Coffee grounds may help remove toxic metals from water

Representational image. Pic/iStock

Spent coffee grounds can remove toxic heavy metals such as lead, copper, and zinc. New research highlights how a common waste product can be turned into a valuable tool. The findings appear at a time when global coffee consumption continues to rise.

In 2021-22, the world consumed more than 176 million 60-kg bags of coffee. That demand generates massive volumes of spent coffee grounds, most of which end up in landfills.

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