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11-18-2009, 05:33 PM
It seemed like a good idea--because rivers and ponds in Bangladesh were contaminated with bacteria, Bangladeshis switched to wells. But soon after, in the early ‘80s, researchers realized those wells were harming Bangladeshis with a new poison--arsenic.
The underground sediment of the Ganges Delta contains arsenic. In 2002 M.I.T. researchers determined that microbes digesting organic carbon were freeing that trapped arsenic. But where did the carbon come from and how was the arsenic getting into the water supply? The M.I.T. team now thinks they have the answers, which they report in the journal Nature Geoscience .
[More] (http://www.scientificamerican.com/podcast/episode.cfm?id=why-bangladesh-water-contains-arsen-09-11-16)
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The underground sediment of the Ganges Delta contains arsenic. In 2002 M.I.T. researchers determined that microbes digesting organic carbon were freeing that trapped arsenic. But where did the carbon come from and how was the arsenic getting into the water supply? The M.I.T. team now thinks they have the answers, which they report in the journal Nature Geoscience .
[More] (http://www.scientificamerican.com/podcast/episode.cfm?id=why-bangladesh-water-contains-arsen-09-11-16)
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