02 Sep '11, 3pm

Can we use discarded plastic water bottles to purify water in developing countries? Researchers may have found a way-

02 Sep 2011: Process Uses Plastic Bottles To Remove Arsenic from Drinking Water U.S. researchers say they have developed a simple, inexpensive process that uses common plastic bottles to remove arsenic from drinking water , a problem facing nearly 100 million people in developing nations. In the process, pieces of plastic soda or water bottles are coated with cysteine — an amino acid found in dietary supplements and foods — and dropped into arsenic-contaminated water. After the mixture is stirred, the coated plastic bits grab hold of the arsenic like a magnet, stripping significant levels of the contaminant from the water, said Tsanangurayi Tongesayi, a professor of analytical and environmental chemistry at Monmouth University and leader of the study. During tests, researchers found that they could reduce arsenic levels from 20 parts per billion — or nearly twice the U.S. ...

Full article: http://e360.yale.edu/digest/process_uses_plastic_bottles_...

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