Sponge made of coffee grounds scrubs lead and mercury from water
Homes, restaurants, and the coffee industry collectively produce about 6 million tons of spent coffee grounds every year. Researchers have now come up with a practical way to use some of this waste. They have made a rubbery foam from used coffee powder and silicone that can pull lead and mercury ions from water (ACS […]
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- On June 14, 2016
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