Transforming Toxic Arsenic Sludge into a Valuable Commodity
A simple process extracts valuable pure arsenic metal from groundwater treatment waste. By Mason Wakley.
Concentrated arsenic waste generated by groundwater treatment plants can now be easily transformed into metallic arsenic. This new method offers the opportunity to create local, circular production of metallic arsenic, an element in demand for green-energy technologies, while ensuring clean drinking water.
Case van Genuchten from the Geological Survey of Denmark and Greenland has been working to tackle arsenic leaching from minerals into drinking water, dubbed the greatest mass poisoning in human history. His latest work with Kaifeng Wang offers a way to produce metallic arsenic, labelled a critical raw material by the EU and US.
Nearly all groundwater contaminated with arsenic is due to naturally occurring deposits of arsenic-containing minerals dissolving into it.
arsenic leaching from minerals into drinking water, the greatest mass poisoning in human history
Author summary: New method transforms toxic arsenic waste into valuable metal.
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