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Old July 2, 2003, 10:43 AM
amit amit is offline
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Join Date: January 31, 2003
Location: New Delhi, India
Posts: 127
Default serious arsenic crisis in bangladesh. a big health disaster :(

The Arsenic Crisis
An environmental health disaster is unfolding in West Bengal and Bangladesh. Tens of millions of persons in many districts are drinking ground water with arsenic concentrations far above acceptable levels. Thousands of people have already been diagnosed with poisoning symptoms, even though much of the at-risk population has not yet been assessed for arsenic-related health problems.
Over the last two decades in Bengal, untreated tube well water was heavily promoted and developed as a safe and environmentally acceptable alternative to microbiologically unsafe untreated surface water. In the 1980s, scientists began finding evidence of arsenic contamination, but only very recently (mid-1990s) has the crisis emerged into broad public awareness. The origin of the arsenic pollution is geological in this case - the arsenic is released to groundwater under naturally occurring aquifer conditions.



"Analyses based on 18,417 (4,125 lab) aggregated by union. The surface estimated based on the union-wise probability assigned to the centroid of each union. Calculation by IDW using a fixed radius of 7.5 km, a 1.5 km grid, and 3.125 union data points."

Color version of Fig. 1, Arsenic in groundwater: testing pollution mechanisms for sedimentary aquifers in Bangladesh. J.M. McArthur, P. Ravenscroft, S. Safiullah and M.F. Thirlwall. Water Resources Research, in press. J.M. McArthur. View the paper at the London Arsenic Group website.

taken from http://bicn.com/acic
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