Africa’s healthcare funding crisis: 3 strategies to manage deadly diseases

Source: – By Francisca Mutapi, Professor in Global Health Infection and Immunity. and co-Director of the Global Health Academy, University of Edinburgh

The increasing trend of reducing foreign aid to Africa is forcing the continent to reassess its approach to healthcare delivery.

African countries face a major challenge of dealing with high rates of communicable diseases, such as malaria and HIV/Aids, and rising levels of non-communicable diseases. But the continent’s health systems don’t have the resources to provide accessible and affordable healthcare to address these challenges.

Historically, aid has played a critical role in supporting African health systems. It has funded key areas, including medical research, treatment programmes, healthcare infrastructure and workforce salaries. In 2021, half of sub-Saharan Africa’s countries relied on external financing for more than one-third of their health expenditures.

As aid dwindles, a stark reality emerges: many African governments are unable to achieve universal health coverage or address rising healthcare costs.

The reduction in aid restricts healthcare services and threatens to reverse decades of health progress on the continent. A fundamental shift in healthcare strategy is necessary to address this crisis.

The well-known maxim that “prevention is better than cure” holds not just for health outcomes but also for economic efficiency. It’s much more affordable to prevent diseases than it is to treat them.

As an infectious diseases specialist, I have seen how preventable diseases can put a financial burden on health systems and households.

For instance, each year, there are global economic losses of over US$33 billion due to neglected tropical diseases. Many conditions, such as lymphatic filariasis, often require lifelong care. This places a heavy burden on families and stretches national healthcare systems to their limits.

African nations can cut healthcare costs through disease prevention. This often requires fewer specialist health workers and less expensive interventions.

To navigate financial constraints, African nations must rethink and redesign their healthcare systems.

Three key areas where cost-effective, preventive strategies can work are: improving water, sanitation, and hygiene; expanding vaccination programmes; and making non-communicable disease prevention part of community health services.

A shift in healthcare delivery

Improving water, sanitation, and hygiene infrastructure

Many diseases prevalent in Africa are transmitted through contact with contaminated water and soil. Investing in safe water, sanitation, and hygiene (WASH) infrastructure is an opportunity. This alone can prevent a host of illnesses such as parasitic worms and diarrhoeal diseases. It can also improve infection control and strengthen epidemic and pandemic disease control.

Currently, WASH coverage in Africa remains inadequate. Millions are vulnerable to preventable illnesses. According to the World Health Organization (WHO), in 2020 alone, about 510,000 deaths in Africa could have been prevented with improved water and sanitation. Of these, 377,000 deaths were caused by diarrhoeal diseases.

Unsafe WASH conditions also contribute to secondary health issues, such as under-nutrition and parasitic infections. Around 14% of acute respiratory infections and 10% of the undernutrition disease burden – such as stunting – are linked to unsafe WASH conditions.

By investing in functional WASH infrastructure, African governments can significantly reduce the incidence of these diseases. This will lead to lower healthcare costs and improved public health outcomes.

Local production of relevant vaccines

Vaccination is one of the most cost-effective health interventions available for preventing infection. Immunisation efforts save over four million lives every year across the continent.

There is an urgent need for vaccines against diseases prevalent in Africa whose current control is heavily reliant on aid. Neglected tropical diseases are among them.

Vaccines can also prevent some non-communicable diseases. A prime example is the human papillomavirus (HPV) vaccine, which can prevent up to 85% of cervical cancer cases in Africa.

HPV vaccination is also more cost-effective than treating cervical cancer. In some African countries, the cost per vaccine dose averages just under US$20. Treatment costs can reach up to US$2,500 per patient, as seen in Tanzania.

It is vital to invest in a comprehensive vaccine ecosystem. This includes strengthening local research and building innovation hubs. Regulatory bodies across the continent must also be harmonised and markets created to attract vaccine investment.

Integrating disease prevention into community healthcare services

Historically, African healthcare systems were designed to address communicable diseases, such as tuberculosis and HIV. This left them ill-equipped to handle the rising burden of non-communicable diseases, such as type 2 diabetes and cardiovascular diseases. One cost-effective approach is to integrate the prevention and management of these diseases into existing community health programmes.

Community health workers currently provide low-cost interventions for health issues such as pneumonia and malaria. They can be trained to address non-communicable diseases as well.

In some countries, community health workers are already filling the service gap. Getting them more involved in prevention strategies will strengthen primary healthcare services in Africa. This investment will ultimately reduce the long-term financial burden of treating chronic diseases.

A treatment-over-prevention approach will not be affordable

Current estimates suggest that by 2030, an additional US$371 billion per year – roughly US$58 per person – will be required to provide basic primary healthcare services across Africa.

Adding to the challenge is the rising global cost of healthcare, projected to increase by 10.4% this year alone. This marks the third consecutive year of escalating costs. For Africa, costs also come from population growth and the rising burden of non-communicable diseases.

By shifting focus from treatment to prevention, African nations can make healthcare accessible, equitable and financially sustainable despite the decline in foreign aid.

The Conversation

Francisca Mutapi is affiliated with Uniting to Combat NTDs

ref. Africa’s healthcare funding crisis: 3 strategies to manage deadly diseases – https://theconversation.com/africas-healthcare-funding-crisis-3-strategies-to-manage-deadly-diseases-253644

Africa’s traditional fermented foods – and why we should keep consuming them

Source: – By Florence Malongane, Senior lecturer, University of South Africa

Fermentation is a process where microorganisms like bacteria and yeast work together to break down complex carbohydrates and protein into simpler, more digestible forms.

The fermentation process not only extends the shelf life of food but also enhances its nutritional content. During fermentation, beneficial microorganisms produce essential vitamins and minerals.

Fermented foods have many benefits and have been shown to reduce inflammation and infections.

As nutrition researchers we undertook an in-depth assessment of fermented African foods and their potential to improve human health cost-effectively.

By gaining a deeper understanding of the diverse microbiomes present in various fermented indigenous African foods, we aim to enhance human health through targeted dietary interventions.

Going back in history

Fermentation as a preservation method can be traced back a long way.

In the Middle East, between 1,000 and 15,000 years ago, people moved from foraging and hunting to organised food cultivation and production.

Evidence of the alcoholic fermentation of barley into beer and grapes into wine dates back to between 2000 and 4000 BC.

In the Middle East and the Indian subcontinent milk was fermented to create yoghurt and other sweet and savoury fermented milks. White cabbage pickles and fermented olives are very popular in the Middle East.

In India and the Philippines, rice flour was fermented to produce products like noodles.

Africa’s traditions

In Africa, fermented foods hold great cultural significance and health benefits, yet this topic has not been thoroughly researched.

Foods are mostly fermented at home and trends vary by region.

The primary ingredients in African fermented foods are mainly cereals, tubers and milk.

Most of the fermented foods are plants that grow on their own in the wild and are often considered weeds in cropped and cultivated land. These include amaranths, Bidens pilosa, cleome and Corchorus species. The increased availability of African indigenous foods could expand the range of commercially available fermented African foods.

While some products like marula beer have entered the commercial market, the overall consumption of fermented foods among Africans has declined.

This drop is largely due to the widespread availability of refrigeration systems and a growing loss of interest in traditional African foods.

Improving health in Africa

Fermented root plants such as cassava and yam have been shown to decrease creatinine levels, which may indicate enhanced renal function and kidney health. This suggests that the fermentation process not only enriches these root plants with probiotics, but also promotes better physiological responses in the body.

Among the diverse array of fruits native to Africa, baobab and marula are the most popular fermented fruits. Fermenting them enhances their protein and fibre content. Consuming fermented baobab fruits has been shown to reduce the activity of α-amylase, an enzyme that may have implications for regulating blood sugar.

Millet, maize, African rice and sorghum are the most fermented grains in Africa. When these foods are fermented, they can help reduce blood glucose levels, serum triglycerides and cholesterol.

Amahewu is a traditional beverage produced through the fermentation of sorghum or maize, mostly enjoyed in South Africa and Zimbabwe for its tangy flavour and smooth texture.

In Kenya, a similar fermented cereal beverage known as uji is made of millet and flavoured with milk, adding to its rich and nutritious profile.

Ghana boasts its own version called akasa, which is prepared from a combination of sorghum, corn and millet and known for its unique taste and cultural significance.

In Sudan, the beverage referred to as abreh varies in preparation but shares the same essence of fermentation, while in Nigeria, ogi is another fermented cereal paste, from similar small grains like sorghum and millet, which produce a creamy beverage.

Fermenting sorghum and millet provides essential nutrients and supports metabolic health and gut function.

In Nigeria, fermented cereal beverages are widely used to control diarrhoea in young children.

Sour milk is the most fermented food in Africa, celebrated for its rich flavour and numerous health benefits.

During the fermentation process, bacteria convert the milk sugar, called lactose, into lactic acid.

Kulenaoto, a traditional fermented milk drink enjoyed in Kenya, is known for its creamy texture and slightly tangy flavour. South Africa produces sour milk known as amasi. Nigeria and Togo share a common fermented dairy product known as wara, which is made from fermented soybeans and is often served as a snack.

In Ghana, nyamie is a rich, thick yogurt-like product. In Cameroon, pendidam is a unique fermented milk product that is cherished for its distinctive taste and nutritional benefits, making it a staple in many households.

Regular consumption of fermented sour milk can play a significant role in weight management, decreasing visceral (gut) fat, which is a risk factor for cardiovascular diseases.

Moreover, fermented milk offers valuable protection against folate deficiency.

Looking forward

African fermented foods could be the easiest and least expensive way of introducing beneficial microbes to the gastrointestinal tract, replacing expensive pharmaceutical probiotics.

These processes should be encouraged, and younger generations need to be exposed to the benefits of these traditions.

Vanishing plants could be preserved and distributed through seed banks.

The tradition of fermentation should be encouraged at both household and commercial levels to promote overall health.

The Conversation

The authors do not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and have disclosed no relevant affiliations beyond their academic appointment.

ref. Africa’s traditional fermented foods – and why we should keep consuming them – https://theconversation.com/africas-traditional-fermented-foods-and-why-we-should-keep-consuming-them-243287

Beating malaria: what can be done with shrinking funds and rising threats

Source: – By Taneshka Kruger, UP ISMC: Project Manager and Coordinator, University of Pretoria

Healthcare in Africa faces a perfect storm: high rates of infectious diseases like malaria and HIV, a rise in non-communicable diseases, and dwindling foreign aid.

In 2021, nearly half of the sub-Saharan African countries relied on external financing for more than a third of their health expenditure. But donor fatigue and competing global priorities, such as climate change and geopolitical instability, have placed malaria control programmes under immense pressure. These funding gaps now threaten hard-won progress and ultimately malaria eradication.

The continent’s healthcare funding crisis isn’t new. But its consequences are becoming more severe. As financial contributions shrink, Africa’s ability to respond to deadly diseases like malaria is being tested like never before.

Malaria remains one of the world’s most pressing public health threats. According to the World Health Organization there were an estimated 263 million malaria cases and 597,000 deaths globally in 2023 – an increase of 11 million cases from the previous year.

The WHO African region bore the brunt, with 94% of cases and 95% of deaths. It is now estimated that a child under the age of five dies roughly every 90 seconds due to malaria.

Yet, malaria control efforts since 2000 have averted over 2 billion cases and saved nearly 13 million lives globally. Breakthroughs in diagnostics, treatment and prevention have been critical to this progress. They include insecticide-treated nets, rapid diagnostic tests, artemisinin-based combination therapies (drug combinations to prevent resistance) and malaria vaccines.

Since 2017, the progress has been flat. If the funding gap widens, the risk is not just stagnation; it’s backsliding. Several emerging threats such as climate change and funding shortfalls could undo the gains of the early 2000s to mid-2010s.

New challenges

Resistance to drugs and insecticides, and strains of the malaria parasite Plasmodium falciparum that standard
diagnostics can’t detect, have emerged as challenges. There have also been changes in mosquito behaviour, with vectors increasingly biting outdoors, making bed nets less effective.

Climate change is shifting malaria transmission patterns. And the invasive Asian mosquito species Anopheles stephensi is spreading across Africa, particularly in urban areas.

Add to this the persistent issue of cross-border transmission, and growing funding shortfalls and aid cuts, and it’s clear that the fight against malaria is at a critical point.

As the world observes World Malaria Day 2025 under the theme “Malaria ends with us: reinvest, reimagine, reignite”, the call to action is urgent. Africa must lead the charge against malaria through renewed investment, bold innovation, and revitalised political will.

Reinvest: Prevention is the most cost-effective intervention

We – researchers, policymakers, health workers and communities – need to think smarter about funding. The economic logic of prevention is simple. It’s far cheaper to prevent malaria than to treat it. The total cost of procuring and delivering long-lasting insecticidal nets typically ranges between US$4 and US$7 each and the nets protect families for years. In contrast, treating a single case of severe malaria may cost hundreds of dollars and involve hospitalisation.

In high-burden countries, malaria can consume up to 40% of public health spending.

In Tanzania, for instance, malaria contributes to 30% of the country’s total disease burden. The broader economic toll – lost productivity, work and school absenteeism, and healthcare costs – is staggering. Prevention through long-lasting insecticidal nets, chemoprevention and health education isn’t only humane; it’s fiscally responsible.

Reimagine: New tools, local solutions

We cannot fight tomorrow’s malaria with yesterday’s tools. Resistance, climate-driven shifts in transmission, and urbanisation are changing malaria’s patterns.

This is why re-imagining our approach is urgent.

African countries must scale up innovations like the RTS,S/AS01 vaccine and next-generation mosquito nets. But more importantly, they must build their own capacity to develop, test and produce these tools.

This requires investing in research and development, regional regulatory harmonisation, and local manufacturing.

There is also a need to build leadership capacity within malaria control programmes to manage this adaptive disease with agility and evidence-based decision-making.

Reignite: Community and collaboration matters

Reigniting the malaria fight means shifting power to those on the frontlines. Community health workers remain one of Africa’s greatest untapped resources. Already delivering malaria testing, treatment and health education in remote areas, they can also be trained to manage other health challenges.

Integrating malaria prevention into broader community health services makes sense. It builds resilience, reduces duplication, and ensures continuity even when external funding fluctuates.

Every malaria intervention delivered by a trusted, local health worker is a step towards community ownership of health.

Strengthened collaboration between partners, governments, cross-border nations, and local communities is also needed.

The cost of inaction is unaffordable

Africa’s malaria challenge is part of a deeper health systems crisis. By 2030, the continent will require an additional US$371 billion annually to deliver basic primary healthcare – about US$58 per person.

For malaria in 2023 alone, US$8.3 billion was required to meet global control and elimination targets, yet only US$4 billion was mobilised. This gap has grown consistently, increasing from US$2.6 billion in 2019 to US$4.3 billion in 2023.

The shortfall has led to major gaps in the coverage of essential malaria interventions.

The solution does not lie in simply spending more, but in spending smarter by focusing on prevention, building local innovation, and strengthening primary healthcare systems.

The responsibility is collective. African governments must invest boldly and reform policies to prioritise prevention.

Global partners must support without dominating. And communities must be empowered to take ownership of their health.

The Conversation

The authors do not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and have disclosed no relevant affiliations beyond their academic appointment.

ref. Beating malaria: what can be done with shrinking funds and rising threats – https://theconversation.com/beating-malaria-what-can-be-done-with-shrinking-funds-and-rising-threats-255126

Paper mills: the ‘cartel-like’ companies behind fraudulent scientific journals

Source: The Conversation – Indonesia – By Rizqy Amelia Zein, Lecturer in Social Psychology, Universitas Airlangga

Science and Nature, two leading science journals, have revealed a growing problem: an alarming rise in fraudulent research papers produced by shady paper mill companies. This wave of fake studies is creating a major headache for the academic world, putting the integrity of global academic research at risk.

Paper mill companies offer authorship services to researchers, academics, and students who want their names listed as an author of a scientific article published in reputable scientific journals.

By paying around €180 to €5000 (approximately US$197 – $5472), a person can have their name listed as the author of research paper, without having to painstakingly do research and write the results. No doubt, some experts refer to these paper mills as illegal and criminal organizations.

A 2023 research highlights a dramatic increase in fraudulent scientific articles traced back to paper mills. In just five years, the numbers of retractions soared jumped from 10 in 2019 to 2,099 in 2023.

Paper mills have also extremely overwhelmed major scientific journal publishers. Hindawi and Wiley, publishers of open access journals in the UK, for example, retracted around 1,200 paper mill articles in 2023. SAGE, a global publisher of books, journals and academic library resources and Elsevier, a scholarly publisher in the Netherlands also retracted hundreds of paper mill articles in 2022.

Paper mills are found operating in countries whose research policies incentivise researchers to produce as many scientific articles as possible, such as China, Russia, India and Iran.

However, their customer profile is quite diverse, from both developed and developing countries, including Indonesia, Malaysia, Germany, and the United States (US).

Based on research data and investigative journalist reports from the last five years, I summarise how these paper mills operate and how to detect them.

The paper mill playbook: tactics and oddities

1. Problematic articles

Paper mills generally manipulate the process of publishing scientific articles. These articles usually plagiarise other published articles, contain false and stolen data, or include engineered and duplicated images.

They also offer to rewrite scientific articles using generative artificial intelligence tools, such as ChatGPT and Quillbot, or to translate published articles from other languages into English.

2. A promised path to publication

In some cases, paper mills offer authorship slots before an article is accepted for publication.

In other cases, they offer authorship slots after the article is ready to be published by the journal.

Therefore, it is not uncommon for paper mills to sell authorship slots with a guarantee that the article will definitely be published. In fact, according to the conventions generally accepted in the academic community, no well-run journal can give such a guarantee.

Publishing decisions are normally made only after editors have considered the feedback from peer reviewers. This means, there is no possibility for a manuscript to secure acceptance before passing the peer review process.

3. Fake reviews and corrupt deals

Paper mills also offer a wide range of additional services. For example, they offer fake peer review services to convince potential buyers that the offered articles have passed rigorous review.

To smooth the way for their operations, some paper mills even operate like a cartel, bribing rogue journal editors to ensure publication. A 2024 investigation by a Science journalist revealed that some scientific journal editors were offered as much as $20,000 to cooperate with these schemes. This investigation resulted in more than 30 editors of reputable international journals identified as involved in paper mill activities.

4. Unusual collaboration patterns

One of the peculiarities of paper mill articles is its strange mix of authors. An article on the activity of ground beetles attacking crops in Kazakhstan, for example, is written by authors who are neither affiliated with institutions in Kazakhstan nor experts in insects or agriculture. The authors’ backgrounds are suspiciously heterogeneous, ranging from anaesthesia, dentistry, to biomedical engineering.

5. Anonymous co-authors

Prospective customers of paper mill services usually have to agree to the rules of confidentiality. By agreeing to this rule, buyers have no idea which journal their article will target or who their co-authors will be. Often, the authors listed on the same paper don’t even know each other.

Spotting the red flags: how to detect paper mills articles

Detecting scientific articles produced by paper mills often begins with analyzing retraction patterns carried out by journals.

This can be done in two ways: by tracking post-publication peer reviews on platforms like PubPeer, or by checking the Retraction Watch database, a website that documents retractions of problematic scientific articles.

However, journals rarely state outright that a retraction is due to paper mill fraud. Instead, articles are typically pulled for reasons like improper inclusion of the name and order of authors, inclusion of many irrelevant citations or references, plagiarism, or inclusion of manipulated or duplicated images.

The proportion of scientific articles retracted for being associated with paper mills is much smaller than the estimated total number of paper mill articles currently in circulation.

Retraction Watch data, as of May 2024, only recorded 7,275 retractions of articles related to the paper mill out of a total of 44,000 retractions recorded. In fact, it is estimated that up to 400,000 paper mill articles have infiltrated scientific literature over the past two decades.

Despite significant efforts from publishers and the academic community through organizations such as United2Act, a global alliance initiated by Committee on Publication Ethics (COPE) and STM, these attempts are barely enough.

How paper mills hurt the public

The UK Research Integrity Office—an independent UK charity that offers support to the public, researchers and organisations to promote good academic research practice—estimates that the paper mill industry has gained around $10 million globally.

For example, a Russian paper mill could earn $6.5 million if they sold all the authorship of scientific articles it produced from 2019 to 2021.

In Indonesia, this financial loss directly impacts the public. Public universities rely on the state budget, funded largely by taxpayers, and tuition fees from students to cover operational expenses, including research grants and publication incentives.

Though the exact financial toll of these paper mills is hard to pin down, it is clear that the public are footing the bill for fraudulent research practices, siphoning resources away from enuin academic advancements.

The Conversation

Rizqy Amelia Zein tidak bekerja, menjadi konsultan, memiliki saham, atau menerima dana dari perusahaan atau organisasi mana pun yang akan mengambil untung dari artikel ini, dan telah mengungkapkan bahwa ia tidak memiliki afiliasi selain yang telah disebut di atas.

ref. Paper mills: the ‘cartel-like’ companies behind fraudulent scientific journals – https://theconversation.com/paper-mills-the-cartel-like-companies-behind-fraudulent-scientific-journals-230124

Indonesian social forestry often excludes women from decisions, risking greater inequality

Source: The Conversation – Indonesia – By Tessa Toumbourou, Postdoctoral Research Fellow in Environmental Social Science, The University of Melbourne

Our analysis of Indonesia’s social forestry permits shows that women remain underrepresented in forest management bodies despite efforts to boost their presence, leaving them out of decisions about their forests.

Social forestry redistributes forest management rights to local communities to advance sustainability and local livelihoods. In 2021, the country revised its social forestry regulations to allow one family representative to participate in social forestry management bodies, ‘giving equal opportunity to both men and women.’

However, our analysis of 400 most recent social forestry permit documents, combined with extended, multi-method field research at four sites, shows that women are often excluded from management bodies but are more involved in social forestry business groups (Kelompok Usaha Perhutanan Sosial or KUPS). These groups focus on the processing and sale of forest products.

This low level of participation in management excludes women from decisions about who receives benefits such as land for cultivation, seedlings, equipment, extension training, and technical information provided by the government and NGOs. The absence of women’s presence may deepen local inequalities and hamper effective forest management.

Gender gaps in social forestry

We reviewed the 400 most recent decree letters issued in 2024 that granted forestry management rights. These included 100 permits each for the managements of Village Forests (Hutan Desa) and Community Forests (Hutan Kemasyarakatan) and their respective KUPS (Table 1). Village Forests are rights collectively held and managed by village administrations, while Community Forests are issued to specific farmer or community groups.

Our analysis found that across Indonesia women are often underrepresented in management groups. On average, only 19.54% of members in Village Forest’s management bodies were women, with participation ranging from none to 80%. This number was even lower in Community Forests, averaging 13.95% women, with some groups having no female members and others up to 56.52%.

However, the available data often lacked details about gender in KUPS-related decrees. Only 19 of 100 Village Forests’ KUPS decrees and 23 of 100 Community Forests’ KUPS decrees included this information.

When gender data was included, women were more involved in KUPS of Village Forests, with an average of 46.32% participation. In contrast, their participation in Community Forests’ KUPS was just 13.06%.

These numbers show that progress in gender representation in Indonesia’s social forestry is mixed. While women are more active in economic activities linked to KUPS, they are still sidelined in formal management roles and decision-making.

Understanding uneven participation

Our field research also highlighted how women and men are participating in, and deriving benefits from, social forestry in Indonesia, while exploring factors influencing women’s (and men’s) involvement.

We focused on four social forestry sites — two Village Forests (Sintang; West Kalimantan province, and Muara Enim; South Sumatra province) and two Community Forests (Gunungkidul; Special Region of Yogyakarta, and Enrekang; South Sulawesi province). We selected sites that reflect different levels of women’s participation.

Table 2 highlights a disparity: while women actively engage in forest land use — such as collecting and processing non-timber forest products and cultivating social forestry land — in two sites (Enrekang and Muara Enim) they are not involved in management bodies where decisions about land use, forest resources and benefit distribution are made.

For example, Masna (pseudonym), a farmer and forest user from Enrekang, shared that her involvement in her village’s forest management body (Kelompok Tani Hutan) was limited to preparing snacks while men made decisions.

Why does this happen?

Deeply rooted gender norms significantly limit women’s involvement in social forestry in some sites. These norms often designate unpaid household and care-giving duties to women, positioning men as the primary decision-makers. This affects women’s confidence and participation in village meetings, where forest management decisions are made reduce women’s participation.

Our findings align with earlier studies showing how gender roles, influenced by discourse promoted by the New Order regime, continue to shape these practices of recognising men as breadwinners and landowners, reinforcing their dominance in formal discussions and decision-making bodies.

Although there are no educational requirements for joining social forestry, research shows that those with more education tend to have more influence. In our study, women in social forestry households averaged fewer years of education (6.6 years) compared to men (8.1 years). Lower education levels, socio-economic challenges, and low confidence in public forums, where education often boosts credibility, can further exclude women.

Geographic barriers such as remote forest locations, rough terrain, and poor roads also hinder women’s participation, making travel difficult and limiting their ability to be involved.

Assistance helps, as do local women leaders

In the Sintang and Gunungkidul sites, women have taken on greater roles in forest management bodies.

In Sintang, support from the Indonesian NGO PUPUK (Association for the Improvement of Small Business) significantly boosted women’s participation in the village forest management body. PUPUK facilitated discussions, provided training at convenient times for women, and encouraged male leaders to back greater female involvement. The number of female members increased from just one in 2018 to 12 women and nine men in a newly formed management body in 2022.

The social forestry group in Gunungkidul – initially a male-dominated, government-led reforestation project – evolved into a community-driven initiative with strong female leadership. Support from both government and NGOs enabled women to take more active roles in forestry and agriculture, especially as many men (and some women) left to seek work elsewhere.

A university-educated woman now leads this group and has inspired younger women to join forest management and KUPS activities. These include producing traditional herbal drinks (wedang uwuh) and making snacks from taro, cassava, and arrowroot grown on forest land.

Across the study sites, women involved in KUPS have developed skills in forest management, financial planning, product processing, and marketing, earning modest incomes. These activities have also shifted gender roles. For example, in Sintang, when Mirna (pseudonym) became head of the KUPS, her husband started taking on domestic chores like cooking and childcare to support her work.

What’s next?

Tackling gender disparities in social forestry requires targeted policies to ensure women’s voices, especially from marginalised groups, are heard in decision-making processes that affect their livelihoods and access to resources.

Introducing quotas or affirmative measures for forest management bodies can help close the gender gap and ensure more equitable benefit distribution. Evidence from other Global South regions suggests that at least 30% female representation in forest management bodies is necessary for meaningful participation, enabling women to influence decisions more effectively.

Inclusive governance also depends on fair representation of different ethnic and socio-economic groups, particularly poorer households. When disadvantaged groups are poorly represented, the distribution of benefits suffers, limiting the equitable flow of resources and opportunities.

Partnerships with NGOs and civil society groups skilled in addressing gender differences can empower women and marginalized men with the skills and confidence needed to engage in decision-making bodies.

Creating safe spaces is also vital. This includes holding gender-specific discussions in local languages at times that fit with both women’s and men’s schedules.

The government must also commit to regularly monitoring women’s participation by collecting and publishing accurate gender-disaggregated data, specific to each site and region.

A decree issued by Ministry of Environment and Forestry in August introduces a policy shift that allows individuals — not just groups — to apply for social forestry. This could boost women’s participation, provided targeted support helps them step into leadership roles. Without this backing, the risk remains that social forestry will continue to be dominated by elite men.


Rahpriyanto Alam Surya Putra, the director of The Asia Foundation’s Environmental Governance program in Indonesia, and Ike Sulistiowati, Director of PUPUK Indonesia, contributed to this study.

The Conversation

Tessa Toumbourou received funding from the Australian Department of Foreign Affairs and Trade through KONEKSI (Knowledge Partnership Platform Australia-Indonesia). The views expressed in this publication do not represent the views of the Australian Government.

Andrea received funding from the Australian Department of Foreign Affairs and Trade through KONEKSI (Knowledge Partnership Platform Australia-Indonesia). The views expressed in this publication do not represent the views of the Australian Government.

Gutomo received funding from the Australian Department of Foreign Affairs and Trade through KONEKSI (Knowledge Partnership Platform Australia-Indonesia). The views expressed in this publication do not represent the views of the Australian Government.

Ilmiawan received funding from the Australian Department of Foreign Affairs and Trade through KONEKSI (Knowledge Partnership Platform Australia-Indonesia). The views expressed in this publication do not represent the views of the Australian Government.

Lilis received funding from the Australian Department of Foreign Affairs and Trade through KONEKSI (Knowledge Partnership Platform Australia-Indonesia). The views expressed in this publication do not represent the views of the Australian Government.

Rumayya received funding from the Australian Department of Foreign Affairs and Trade through KONEKSI (Knowledge Partnership Platform Australia-Indonesia). The views expressed in this publication do not represent the views of the Australian Government.

Yulia received funding from the Australian Department of Foreign Affairs and Trade through KONEKSI (Knowledge Partnership Platform Australia-Indonesia). The views expressed in this publication do not represent the views of the Australian Government.

ref. Indonesian social forestry often excludes women from decisions, risking greater inequality – https://theconversation.com/indonesian-social-forestry-often-excludes-women-from-decisions-risking-greater-inequality-238904

Reflecting on 20 years of the Aceh tsunami: From ‘megathrust’ threat to disaster mitigation

Source: The Conversation – Indonesia – By Zulfakriza Z., Associate Professor, Global Geophysics Research Group, Institut Teknologi Bandung

20 years have passed since the Aceh tsunami, which left deep scars on Indonesia, especially for those directly affected. Aceh was also recovering from a three-decade armed conflict between the Free Aceh Movement and the national government

Throughout December 2024, The Conversation Indonesia, in collaboration with academics, is publishing a special edition honouring the 20 years of efforts to rebuild Aceh. We hope this series of articles preserves our collective memory while inspiring reflection on the journey of recovery and peace in the land of ‘Serambi Makkah.’


Sunday, December 26, 2004, 7:58:53 AM (WIB, GMT+7): A 9.1 moment magnitude (Mw) earthquake occurred off the west coast of Aceh. The quake, originating from a depth of 30 kilometers below the sea, triggered a tsunami that devastated the province.

Research in 2021 suggested the earthquake’s magnitude was actually greater than what was previously recorded — 9.2 Mw. Scientists came to this conclusion after recalculating tsunami data using Green’s Function, a mathematical method that analyses how tsunami waves are formed and spread. This gave them a more accurate estimate of how strong the earthquake was.

From December 26, 2004, to February 26, 2005, the United States Geological Survey (USGS) documented about 2,050 aftershocks, a series of aftershock caused by the mainshock.

The effects of the 2004 Aceh earthquake and tsunami extended beyond Indonesia, affecting coastlines in Southeast Asia, South Asia, and possibly Africa. More than 227,000 people were killed, with Aceh alone accounting for approximately 167,000.

The 2004 Aceh Earthquake and Tsunami is known as one of the most devastating natural disasters in history. While it left deep wounds, it also demonstrated the fundamental need for disaster preparedness.

Tectonic map, megathrust zones, and seismic gaps

Indonesia is prone to disasters due to its location in a tectonically active zone where four major plates — Indo-Australian, Eurasian, Pacific, and Philippine — with convergence movement.

Comprising Earth’s rigid outer layer or lithosphere, a tectonic plate is a large, irregularly shaped sheet of solid rock that moves and interacts with other plates to sculpt the surface of the planet over geological time. These plate clashes have the potential to trigger massive earthquakes, particularly in western Sumatra, southern Java, Bali, Nusa Tenggara, the Banda Sea, Maluku, Papua, and Sulawesi.

A shift between two tectonic plates in the Indian Ocean resulted in a thrust fault, causing the 2004 Aceh earthquake. The fault stretched 500 kilometers – roughly the distance between Jakarta and Yogyakarta – with a breadth of about 150 kilometers. Known as a “megathrust earthquake,” the plates shifted by more than 20 meters, releasing enormous energy and causing tsunami waves up to 35 meters high – the height of a 10-story building.

Aside from earthquakes and tsunamis, tectonic movements can also trigger volcanic activity. Indonesia, which is part of the Pacific Ring of Fire, has 127 active volcanoes, making it the world’s most seismically and volcanically active region.

Between 1900 and 2023, Indonesia recorded 14,820 earthquakes with magnitudes greater than 5 Mw. Among these, 15 were more than 8 Mw, including the 2004 Aceh earthquake. Other big earthquakes, like those in Sumba (1977), Biak (1996), Nias (2005), and Bengkulu (2007), also triggered tsunamis, causing substantial casualties and damage.

Indonesia also has several megathrust zones – areas along tectonic plate boundaries prone to generating large earthquakes like the 2004 Aceh event. There are 13 identified megathrust zones near the waters off western Sumatra, southern Java, Bali, Nusa Tenggara, northern Sulawesi, Halmahera, and Papua. These zones are prone to generate quakes of magnitudes ranging from 7.8 to 9.2 Mw, capable of delivering major destruction and tsunamis.

Over the last 30 years, some of Indonesia’s megathrust zones have been releasing seismic energy. These zones were the source of major earthquakes such as 1996 Biak, 1994 Banyuwangi, 2004 Aceh, 2005 Nias, 2006 Pangandaran, and 2007 Bengkulu.

However, data from the past 123 years show that some parts of the megathrust zones rarely experience large earthquakes. This could be because tectonic movements in these locations are stuck, causing stress to build up over time. These “seismic gaps” indicate high-risk zones for future big earthquakes.

A seismic gap, for example, exists between the megathrust zones off the western and eastern coasts of Java. For instance, in western Java’s subduction zone, the slip deficit — or plate movement locked in place — has reached 40-60 mm per year. If this energy is eventually released, it might result in a significant earthquake and possibly a tsunami.

Advances in disaster research

Indonesia’s high disaster risk has attracted scholars from all around the world, particularly following the 2004 Aceh Tsunami. From 2005 to 2024, Google Scholar recorded approximately 1,000 scientific works on Indonesian earthquakes and tsunamis.

These studies have improved our understanding of earthquake causes and trends. For example, research on the 2018 Palu and Sunda Strait tsunamis revealed that neither was directly caused by earthquakes. The Palu tsunami resulted from an undersea landslide triggered by a 7.5 Mw earthquake on September 28, 2018. Meanwhile, the Sunda Strait tsunami was caused by the fall of Mount Anak Krakatau’s volcanic side.

Indonesian academics have also investigated big earthquake origins and aftershocks. Teams from the National Research and Innovation Agency (BRIN), the Meteorology, Climatology, and Geophysics Agency (BMKG), and the Bandung Institute of Technology (ITB) have looked at aftershock patterns to learn more about where earthquakes come from and how they work. Among those closely studied are 2018 Lombok and 2022 Cianjur. This has led to new ideas for reducing risk and damage.

The Indonesian Tsunami Early Warning System (InaTEWS), managed by BMKG, continues to encourage seismic research collaborations. By 2024, the system would have 521 seismic stations spread across Indonesia. This extensive network allows for faster broadcast of earthquake data to the public, notably timely tsunami warnings after major earthquakes.

Mitigation requires collaboration

While scientists continue to investigate tectonic motions, accurately predicting earthquakes and tsunamis remains impossible. Therefore, mitigation and risk reduction are crucial.

Disaster mitigation efforts include public education and the use of earthquake-resistant infrastructure. These require the support of a wide range of stakeholders.

In 2007, three years after the Aceh Tsunami, Indonesia passed a Disaster Management Law, detailing risk reduction activities, including mitigation. This law promotes collaboration among five major elements: government, communities, academics, corporations, and the media — a framework known as the “pentahelix.”

The government acts as a regulator, the media disseminates information, corporations provide financial and technological support, communities serve as field implementers, and academics act as innovators.

Collaboration is essential for successful catastrophe mitigation. However, problems such as sectoral ego frequently impede efforts. For example, a refusal to share data across authorities can jeopardise earthquake research and mitigation efforts.

Finally, disaster risk mitigation is a shared responsibility. Building a more robust and sustainable mitigation system requires improved institutional coordination and communication.

The Conversation

Zulfakriza Z. tidak bekerja, menjadi konsultan, memiliki saham, atau menerima dana dari perusahaan atau organisasi mana pun yang akan mengambil untung dari artikel ini, dan telah mengungkapkan bahwa ia tidak memiliki afiliasi selain yang telah disebut di atas.

ref. Reflecting on 20 years of the Aceh tsunami: From ‘megathrust’ threat to disaster mitigation – https://theconversation.com/reflecting-on-20-years-of-the-aceh-tsunami-from-megathrust-threat-to-disaster-mitigation-245142

Lessons from Aceh: How language unites and segregates in conflicts

Source: The Conversation – Indonesia – By Saiful Akmal, Chair professor, Universitas Islam Negeri Ar-Raniry

20 years have passed since the Aceh tsunami, leaving deep scars on Indonesia, especially for those directly affected. Aceh was also recovering from a three-decade armed conflict between the Free Aceh Movement and the national government

Throughout December 2024, The Conversation Indonesia, in collaboration with academics, is publishing a special edition honouring the 20 years of efforts to rebuild Aceh. We hope this series of articles preserves our collective memory while inspiring reflection on the journey of recovery and peace in the land of ‘Serambi Makkah.’


In December 2022, the Aceh People’s Representative Council (DPR) officially enacted the 2022 Qanun (regional regulation) on the Acehnese language. This regulation mandates that the use of Indonesian, in any form of communications, from scientific works to public services, must be accompanies by Acehnese translations. This move reflects Aceh’s autonomy in preserving local cultures, a key demand of the now-defunct Free Aceh Movement (GAM), which sought independence from Indonesia.

The Aceh conflict that ended with the signing of a peace agreement in August 2005, less than a year after the Aceh devastating tsunami, stemmed from locals’ dissatisfaction with the central government. The separatist movement was triggered by economic inequality and natural resource exploitation.

The Qanun reaffirms the Indonesian government and GAM’s commitment to peace following three-decade armed conflict, as outlined in the 2005 Helsinki Agreement. Language — as an important element in culture — can aid in resolving conflicts. It can reduce psychological barriers and foster trust. Local languages, in particular, can strenthen nationalism by promoting empathy and cultural appreciation.

Language for political mobilisation

The use of language can excarcebate conflicts. It can be used to agitate and mobilise people, create hostile narratives, and be used as a propaganda tool to assert group identity and define friends and foes.

During Soeharto’s dictatorship era, the government’s nationalism policy emphasised the exclusive use of Indonesian as national language, even in regions with strong local cultures and languages like Aceh. Local languages are considered less important than Indonesian. This has led to a decline in the use and teaching of local languages in schools, which in turn can threaten the survival and development of these languages.

During the conflict, using Acehnese could be risky, especially in areas sympathetic to GAM. Speaking local language could lead to accusation of supporting the movement, often resulting in intimidation and arrests by the Indonesian military.

GAM, on the other hand, used Acehnese to raise people’s spirit and gather support during the conflict. Cassettes with songs in local languages played in villages created a sense of solidarity while drawing a stark line between “us” and “them.” This demonstrates how language can be a powerful tool in social and political mobilisation.

Language for conflict resolution

In Aceh, the role of local language in promoting conflict resolution is significant for the following reasons:

1. Reduces psychological barriers

In 2005, Hamid Awaluddin, a Bugis descendant and former Minister of Justice and Human Rights who represented the government in the negotiation of conflict resolution in Aceh, read ‘pantun’, a traditional Malay poem, in Acehnese:

pat ujeun yang hana pirang, pat prang yang hana reuda,” (is there rain that will not stop? Is there a war that cannot be ended?).

Although his Acehnese was not fluent, Hamid’s efforts were warmly received by Wali Nanggroe, Aceh’s cultural leadership, and other people who represented the local communities. His decision to use the local language had created an intimate atmosphere, which then helped reduce tension and increased mutual trust between the two parties.

Language in such contexts becomes a powerful instrument in a peace negotiation process, serving not only as a technical communication tool, but also as a symbol of empathy and respect. It allows the conflicting parties to feel more valued and share emotions, which then can pave the way for a more constructive and inclusive dialogue.

2. Strengthening the sense of nationalism

Case studies show that the recognition of the Acehnese language, identity and culture by the central government can foster Indonesian nationalism among the local communities. According to a research, building something from within, and respecting local conditions contributes to a more permanent peace-building effort.

The government’s move to acknowledge local languages of Aceh and Gayo as intangible heritages has allowed the people to use them in public spaces. As a result, this strengthened the sense of belonging of Acehnese people to the state

By providing space to local languages, the state shows respect for existing cultural diversity–allowing local communities feel more integrated with the national framework.

An inclusive approach

The establishment of the Acehnese Language Qanun is not without risks. While it is true that the Acehnese Language Qanun can increase nationalism because it makes people feel appreciated and recognised, it may negatively impact other ethnic languages.

Aceh is home to 13 other local languages. Enacting Acehnese as an official regional language can make non-Acehnese groups feel isolated, as evidenced by past protests from the Gayo community and other minorities.

For example, protests arose when being fluent in Acehnese became one of the requirements to become a local leader such as a Wali Nanggroe. Additionally, replacing the Gayo hymn with the Acehnese hymn in ceremonial activities has angered the Gayo people as the majority ethnic group in the area.

Without proper mitigation, this policy risks alienating minority groups, potentially leading to feelings of forced assimilation for minority languages. This will harm the efforts to build sustainable peace in Aceh. Therefore, an inclusive approach to language policy is very important.

The efforts to promote the Acehnese language should be accompanied by similar steps to recognise and preserve the languages and cultural expressions of other ethnic groups in Aceh.

This inclusive approach is crucial to building long-term peace and social cohesion in the region. After all, Aceh’s experience teaches us that language has two sides in conflict resolution: as a tool that strengthens peace, or sharpens differences.

The Conversation

Saiful Akmal received funding from the Ministry of Religion of the Republic of Indonesia in 2024 for research entitled “Language, Identity, and Conflict Resolution: The Case of Aceh and Patani.”.

Melly Masni menerima dana dari Kementerian Agama Republik Indonesia tahun 2024 untuk riset berjudul “Language, Identity, and Conflict resolution: The Case of Aceh and Patani”.

ref. Lessons from Aceh: How language unites and segregates in conflicts – https://theconversation.com/lessons-from-aceh-how-language-unites-and-segregates-in-conflicts-245481

High skills, low protection: the legal hurdles for foreign workers in Indonesia

Source: The Conversation – Indonesia – By Wayne Palmer, Senior Research Fellow, Bielefeld University

ilikeyellow/Shutterstock

Developing countries like Indonesia use foreign high-skilled and high-wage workers to drive economic growth and innovation. However, protection of their legal rights is often neglected, affecting these workers’ productivity and well-being and Indonesia’s reputation as a destination country for employment.

My research delves into the flaws of Indonesia’s labour market institutions, such as the national labour dispute settlement system, revealing that current mechanisms are inadequate in protecting the rights of high-skilled foreign workers.

The study

My findings show the national dispute settlement system exhibits significant systemic shortcomings, such as processing cases slowly and siding with employers, which limit its capacity to protect all workers effectively. But disputes involving foreign workers are further complicated by the fact that immigration law allows employers to cancel residence permits, meaning that the government requires the workers to leave the country even though the workers may have been unfairly dismissed.

Foreign workers are mainly from Northeast Asia (China, Japan and Korea), and their use on investment-tied projects coupled with Indonesia’s downstreaming programme will ensure their numbers continue to grow. In 2023, the Indonesian government issued 168,048 permits for foreigners to work in Indonesia with the top three destinations being Central Sulawesi (18,678), Jakarta (13,862) and West Java (10,807). By July 2024, the government had already issued more than 14% more permits than by the same time the previous year.

My study examined 92 labour disputes involving foreign workers between 2006 (when the new national dispute settlement system was implemented) and 2022, which were settled by the Industrial Relations Court. One additional dispute was filed in 2023, but the Industrial Relations Court has not yet published the settlement despite a legal requirement to do so.

I complemented these court settlements with 98 qualitative interviews with other stakeholders, including policymakers, labour rights activists, legal professionals, and other foreign workers, such as foreign spouses, remote workers and digital nomads.

As in other countries too, the number of registered labour disputes is only the tip of the iceberg, as workers tend to cut their losses and move on rather than invest time, energy and limited financial resources in challenging their better-resourced employers.

Employers were all Indonesian companies, so no foreign workers who filed a lawsuit worked for a multinational company, and those who did so had at least 20 nationalities.


CC BY

In terms of geographical distribution, the studied disputes were settled in 13 local jurisdictions, and were mostly lodged by workers rather than employers.

The nature of the disputes mostly involved claims that an employment contract had been terminated prematurely (87 cases), while a much smaller number involved resignation (4 cases) or were unknown (1 case). Of the 92 claims, 83 were initiated by workers, and eight by an employer. In one case, the lodging party was not recorded in the final decision.

Hiring a private lawyer

Employers used the Immigration Law to undermine the protective role of the Manpower Law – as it stands foreign workers are only entitled to employment protection if they hold a valid residence permit, which employers can and do shorten. Doing so shows that the Indonesian government prioritizes the flexibility of employers at the expense of employment protection for foreign workers.

In at least 92% cases, foreign workers used paid assistance of a private lawyer to represent themselves at formal meetings and hearings required by the Disputes Settlement Law, the cost of which could be hefty.

As one foreign worker explained:

It’s always in the back of your mind, to do whatever to make employers happy if you want to stay. No matter what the work permit and contract say, they can ask immigration to kick us out within a week!“

A retired government official responsible for designing policy regarding foreign workers was surprised when he heard this, explaining that:

I thought they could look after themselves because they earn such high wages. Well, higher than the average Indonesian worker, that is.

Hiring a private lawyer is the only way to represent themselves throughout the dispute resolution process because they need to leave Indonesia once they are fired. Not having the legal right to remain in Indonesia makes it very difficult – even impossible – to do it without them.

Addressing institutional failures

Engaging a private lawyer served as an ‘institutional fix’ that enabled most foreign workers to engage with Indonesia’s labour dispute settlement system by attending formal meetings and hearings, as well as filling out required paperwork and sending essential letters and replies.

Addressing this institutional failure requires a shift in law and policy. Firstly, legal reforms are essential to ensure that immigration and employment laws are integrated to enable foreign workers to have access to legal processes intended to help protect labour rights. At a minimum, this would involve amending policy to prevent employers from cancelling residence permits so that foreign workers need to leave the country prematurely.

Alternatively, the Directorate-General of Immigration could still permit employers to do so, but then provide the affected foreign workers with a limited-stay visa so that they can remain in Indonesia to engage with the legal process. The Hong Kong Immigration Department does this for Indonesian migrant workers.

Secondly, there is a need for enhanced support systems that provide immediate and effective assistance to foreign workers. Government agencies tasked with settling labour disputes, such as local manpower offices and the Industrial Relations Court, should be equipped with adequate resources and trained personnel to handle migrant labour issues. Doing so would decrease the reliance of foreign workers on private lawyers.

Failure to protect the employment rights of foreign workers has the potential to damage Indonesia’s reputation as a destination country for employment. Such damage could undermine Indonesia’s ambitious plans to build a new capital city (Ibu Kota Nusantara) with the assistance of foreign workers, and undermine the government’s downstreaming programme, which helps Indonesia earn more from the export of raw minerals.

The Conversation

Wayne Palmer has received research funding from the International Labour Organization, the Freedom Fund, and the Australian Research Council.

ref. High skills, low protection: the legal hurdles for foreign workers in Indonesia – https://theconversation.com/high-skills-low-protection-the-legal-hurdles-for-foreign-workers-in-indonesia-230795

There’s gold trapped in your iPhone – and chemists have found a safe new way to extract it

Source: The Conversation – Canada – By Justin M. Chalker, Professor of Chemistry, Flinders University

A sample of refined gold recovered from mining and e-waste recycling trials. Justin Chalker

In 2022, humans produced an estimated 62 million tonnes of electronic waste – enough to fill more than 1.5 million garbage trucks. This was up 82% from 2010 and is expected to rise to 82 million tonnes in 2030.

This e-waste includes old laptops and phones, which contain precious materials such as gold. Less than one quarter of it is properly collected and recycled. But a new technique colleagues and I have developed to safely and sustainably extract gold from e-waste could help change that.

Our new gold-extraction technique, which we describe in a new paper published today in Nature Sustainability, could also make small-scale gold mining less poisonous for people – and the planet.

Soaring global demand

Gold has long played a crucial role in human life. It has been a form of currency and a medium for art and fashion for centuries. Gold is also essential in modern industries including the electronics, chemical manufacture and aerospace sectors.

But while global demand for this precious metal is soaring, mining it is harmful to the environment.

Deforestation and use of toxic chemicals are two such problems. In formal, large-scale mining, highly toxic cyanide is widely used to extract gold from ore. While cyanide can be degraded, its use can cause harm to wildlife, and tailings dams which store the toxic byproducts of mining operations pose a risk to the wider environment.

In small-scale and artisanal mining, mercury is used extensively to extract gold. In this practice, the gold reacts with mercury to form a dense amalgam that can be easily isolated. The gold is then recovered by heating the amalgam to vaporise the mercury.

Small-scale and artisanal mining is the largest source of mercury pollution on Earth, and the mercury emissions are dangerous to the miners and pollute the environment. New methods are required to reduce the impacts of gold mining.

A bucket full of telephone circuit board parts.
In 2022, humans produced an estimated 62 million tonnes of electronic waste.
DAMRONG RATTANAPONG/Shutterstock

A safer alternative

Our interdisciplinary team of scientists and engineers has developed a new technique to extract gold from ore and e-waste. The aim was to provide a safer alternative to mercury and cyanide and reduce the health and environmental impacts of gold mining.

Many techniques have previously been reported for extracting gold from ore or e-waste, including mercury- and cyanide-free methods. However, many of these methods are limited in rate, yield, scale and cost. Often these methods also consider only one step in the entire gold recovery process, and recycling and waste management is often neglected.

In contrast, our approach considered sustainability throughout the whole process of gold extraction, recovery and refining. Our new leaching technology uses a chemical commonly used in water sanitation and pool chlorination: trichloroisocyanuric acid.

When this widely available and low-cost chemical is activated with salt water, it can react with gold and convert it into a water-soluble form.

To recover the gold from the solution, we invented a sulphur-rich polymer sorbent. Polymer sorbents isolate a certain substance from a liquid or gas, and ours is made by joining a key building block (a monomer) together through a chain reaction.

Our polymer sorbent is interesting because it is derived from elemental sulphur: a low-cost and highly abundant feedstock. The petroleum sector generates more sulphur than it can use or sell, so our polymer synthesis is a new use for this underused resource.

Our polymer could selectively bind and remove gold from the solution, even when many other types of metals were present in the mixture.

The simple leaching and recovery methods were demonstrated on ore, circuit boards from obsolete computers and scientific waste. Importantly, we also developed methods to regenerate and recycle both the leaching chemical and the polymer sorbent. We also established methods to purify and recycle the water used in the process.

In developing the recyclable polymer sorbent, we invented some exciting new chemistry to make the polymer using light, and then “un-make” the sorbent after it bound gold. This recycling method converted the polymer back to its original monomer building block and separated it from the gold.

The recovered monomer could then be re-made into the gold-binding polymer: an important demonstration of how the process is aligned with a circular economy.

A long and complex road ahead

In future work, we plan to collaborate with industry, government and not-for-profit groups to test our method in small-scale mining operations. Our long-term aim is to provide a robust and safe method for extracting gold, eliminating the need for highly toxic chemicals such as cyanide and mercury.

There will be many challenges to overcome including scaling up the production of the polymer sorbent and the chemical recycling processes. For uptake, we also need to ensure that the rate, yield and cost are competitive with more traditional methods of gold mining. Our preliminary results are encouraging. But there is still a long and complex road ahead before our new techniques replace cyanide and mercury.

Our broader motivation is to support the livelihood of the millions of artisanal and small-scale miners that rely on mercury to recover gold.

They typically operate in remote and rural regions with few other economic opportunities. Our goal is to support these miners economically while offering safer alternatives to mercury. Likewise, the rise of “urban mining” and e-waste recycling would benefit from safer and operationally simple methods for precious metal recovery.

Success in recovering gold from e-waste will also reduce the need for primary mining and therefore lessen its environmental impact.

The Conversation

Justin M. Chalker is an inventor on patents associated with the gold leaching and recovery technology. Both patents are wholly owned by Flinders University. This research was supported financially by the Australian Research Council and Flinders University. He has an ongoing collaboration with Mercury Free Mining and Adelaide Control Engineering: organisations that supported the developments and trials reported in this study.

ref. There’s gold trapped in your iPhone – and chemists have found a safe new way to extract it – https://theconversation.com/theres-gold-trapped-in-your-iphone-and-chemists-have-found-a-safe-new-way-to-extract-it-259817

‘Do not eat’: what’s in those little desiccant sachets and how do they work?

Source: The Conversation – Canada – By Kamil Zuber, Senior Industry Research Fellow, Future Industries Institute, University of South Australia

towfiqu ahamed/Getty Images

When you buy a new electronic appliance, shoes, medicines or even some food items, you often find a small paper sachet with the warning: “silica gel, do not eat”.

What exactly is it, is it toxic, and can you use it for anything?

The importance of desiccants

That little sachet is a desiccant – a type of material that removes excess moisture from the air.

It’s important during the transport and storage of a wide range of products because we can’t always control the environment. Humid conditions can cause damage through corrosion, decay, the growth of mould and microorganisms.

This is why manufacturers include sachets with desiccants to make sure you receive the goods in pristine condition.

The most common desiccant is silica gel. The small, hard and translucent beads are made of silicon dioxide (like most sands or quartz) – a hydrophilic or water-loving material. Importantly, the beads are porous on the nano-scale, with pore sizes only 15 times larger than the radius of their atoms.

Silica gel looks somewhat like a sponge when viewed with scanning electron microscopy.
Trabelsi et al. (2009), CC BY-NC-ND

These pores have a capillary effect, meaning they condense and draw moisture into the bead similar to how trees transport water through the channelled structures in wood.

In addition, sponge-like porosity makes their surface area very large. A single gram of silica gel can have an area of up to 700 square metres – almost four tennis courts – making them exceptionally efficient at capturing and storing water.

Is silica gel toxic?

The “do not eat” warning is easily the most prominent text on silica gel sachets.

According to health professionals, most silica beads found in these sachets are non-toxic and don’t present the same risk as silica dust, for example. They mainly pose a choking hazard, which is good enough reason to keep them away from children and pets.

However, if silica gel is accidentally ingested, it’s still recommended to contact health professionals to determine the best course of action.

Some variants of silica gel contain a moisture-sensitive dye. One particular variant, based on cobalt chloride, is blue when the desiccant is dry and turns pink when saturated with moisture. While the dye is toxic, in desiccant pellets it is present only in a small amount – approximately 1% of the total weight.

Two plastic containers, one with blue translucent beads, one with pink.
Indicating silica gel with cobalt chloride – ‘fresh’ on the left, ‘used’ on the right.
Reza Rio/Shutterstock

Desiccants come in other forms, too

Apart from silica gel, a number of other materials are used as moisture absorbers and desiccants. These are zeolites, activated alumina and activated carbon – materials engineered to be highly porous.

Another desiccant type you’ll often see in moisture absorbers for larger areas like pantries or wardrobes is calcium chloride. It typically comes in a box filled with powder or crystals found in most hardware stores, and is a type of salt.

Kitchen salt – sodium chloride – attracts water and easily becomes lumpy. Calcium chloride works in the same way, but has an even stronger hygroscopic effect and “traps” the water through a hydration reaction. Once the salt is saturated, you’ll see liquid separating in the container.

A shelf in a wardrobe with a purple box with white powder inside in the corner.
Closet and pantry dehumidifiers like this one typically contain calcium chloride which binds water.
Healthy Happy/Shutterstock

I found something that doesn’t seem to be silica gel – what is it?

Some food items such as tortilla wraps, noodles, beef jerky, and some medicines and vitamins contain slightly different sachets, labelled “oxygen absorbers”.

These small packets don’t contain desiccants. Instead, they have chemical compounds that “scavenge” or bond oxygen.

Their purpose is similar to desiccants – they extend the shelf life of food products and sensitive chemicals such as medicines. But they do so by directly preventing oxidation. When some foods are exposed to oxygen, their chemical composition changes and can lead to decay (apples turning brown when cut is an example of oxidation).

There is a whole range of compounds used as oxygen absorbers. These chemicals have a stronger affinity to oxygen than the protected substance. They range from simple compounds such as iron which “rusts” by using up oxygen, to more complex such as plastic films that work when exposed to light.

A pile of various sachets and sheets found inside products.
Some of the sachets in your products are oxygen absorbers, not desiccants – but they may look similar.
Sergio Yoneda/Shutterstock

Can I reuse a desiccant?

Although desiccants and dehumidifiers are considered disposable, you can relatively easily reuse them.

To “recharge” or dehydrate silica gel, you can place it in an oven at approximately 115–125°C for 2–3 hours, although you shouldn’t do this if it’s in a plastic sachet that could melt in the heat.

Interestingly, due to how they bind water, some desiccants require temperatures well above the boiling point of water to dehydrate (for example, calcium chloride hydrates completely dehydrate at 200°C).

After dehydration, silica gel sachets may be useful for drying small electronic items (like your phone after you accidentally dropped it into water), keeping your camera dry, or preventing your family photos and old films from sticking to each other.

This is a good alternative to the questionable method of using uncooked rice, as silica gel doesn’t decompose and won’t leave starch residues on your things.

The Conversation

Kamil Zuber does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. ‘Do not eat’: what’s in those little desiccant sachets and how do they work? – https://theconversation.com/do-not-eat-whats-in-those-little-desiccant-sachets-and-how-do-they-work-258398