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IMAGE: In our pilot study, we found that 70 percent of the zinc present in fly ash can be recycled. The zinc is not extracted as a pure metal, which would. view more
Credit: JO Yxell /Chalmers University of Technology
Incineration of solid waste produces millions of tonnes of waste fly ash in Europe each year, that most commonly ends up in landfill. But this ash often contains significant amounts of precious metals, such as zinc. A unique method developed by researchers at Chalmers University of Technology, Sweden, can now help extract these precious metals, potentially leading to reductions in environmental pollution, landfill and transport.