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‘Super sand’ coated with graphite could provide clean drinking water


To test out the coated sand, the researchers ran two model contaminants through it, including mercury at 400 parts per billion and Rhodamine B dye at 10 parts per million. The coarse sand's adsorption capacity of mercury was saturated within 10 minutes, and continued removing mercury for more than 50 minutes and resulted in filtered water with less than one part per billion.

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