Tackling the dangers of lead pollution from solar batteries in Africa
A study conducted by the University of Manchester indicates significant health and environmental risks from the informal recycling of lead-acid batteries used in off-grid solar energy systems in Malawi. These batteries are essential for electricity supply in regions without traditional electricity grids, a crucial step towards broader access to electricity in sub-Saharan Africa.
Researchers noted that a typical battery recycling process releases between 3.5 and 4.7 kg of lead, which exceeds safe levels by more than a hundred times the lethal dose for adults. Dr. Christopher Kinally, who led the study during his PhD, highlighted the urgent need for structured waste management to reduce these risks. According to him, “expanding access to solar energy is essential for sustainable development, but must be accompanied by effective waste management strategies to avoid serious consequences for public health.”
The role of the private sector in providing off-grid solar energy solutions is increasing, with projections pointing to potential electricity access for hundreds of millions of people by 2030. However, the lack of formal recycling practices in places like Malawi has resulted in hazardous exposure to lead. Lead, a potent neurotoxin, poses serious risks, especially for children whose brain development can be permanently damaged even at low exposure levels.
The investigation also revealed alarming practices in local communities where technicians, who lack proper training in hazardous waste management, process and recycle these batteries in open markets. They often use rudimentary tools to crack open batteries and extract lead, significantly polluting the environment.
Dr. Alejandro Gallego Schmid, Kinally’s supervisor, stated, “It is critical to address the life cycle of batteries used in solar energy systems, from production to disposal, to maintain the sustainability characteristics of solar energy.”
The findings, published in Applied Energy, are part of a wider study into the impact of unregulated recycling practices in developing economies, highlighting the urgent need for comprehensive research into the health impacts and calling for immediate regulatory reforms.
Research report:Life cycle assessment of informal waste management practices for solar energy systems in Malawi
