Water filtration by nanotechnology
Scientists at Rice University (US) have discovered a way to use nanotechnology to filter arsenic from drinking water. Their invention includes magnetic interactions between fragments of rust that are 5,000 times smaller than the width of the hair.
By blending these bits with arsenic water, scientists discovered arsenic clinging to iron oxide particles as they were extracted from the water by magnets, thereby reducing the amount of arsenic in the water. About 15 gr of rust can filter 1 liter of water.
Scientists say handheld magnets are enough to filter water, not the big ones like old models.
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