A huge concern in many parts of the world is drinkable water. The World Health Organization (WHO) reports that about 884 million people around the world do not have access to clean drinking water.
Researchers have now come up with a novel idea that could help ease this health issue. Sand itself is a good filter for biological waste, but not so hot at removing heavy metals, which can make people sick.
The research shows that coating grains of sand with a carbon material dramatically reduced the heavy metals in water.
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