Simple water filter can nail arsenic

By Sid Perkins, 15:50 PM April 15, 2008

From Montreal, at a joint meeting of the American and Canadian Geophysical Unions

Field tests in Nepal suggest that people who live in areas with arsenic-tainted aquifers may be able to purify their drinking water by passing it through a low-cost, low-tech filter with a simple active ingredient—a few handfuls of iron nails.

Groundwater in many areas of the world contains arsenic (SN: 11/15/03, p. 315: Attack of the Rock-Eating Microbes!). In the Terai region of southern Nepal, about 90 percent...

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