Arsenic

Paper presented to the International assemblage on Water data link in Disasters held in Kolkata on 5-6 December 2002 ARSENIC defilement OF GROUNDWATER IN WEST BENGAL (INDIA): BUILD-UP IN SOIL-CROP SYSTEMS S. K. Sanyal1 and S. K. T. Nasar2 1 Department of rude chemistry and Soil Science, talent of Agriculture Main Campus, Mohanpur, 2 board of directors of Research, Bidhan Chandra Krishi Viswavidyalaya, Kalyani-741235, Nadia, westmost Bengal, India Abstract A large part of the Bengal delta catchment area restrain by the rivers Bhagirathi and Padma is touched by arsenous anhydride contamination of groundwater of geogenic theme the exact term of geochemical reactions releasing arsenic from the aquifer sediments is muted debated. lone(prenominal) less than 10% of the issue forth groundwater accounts for drinking purpose spot more than 90% is utilise for clothe-irrigational requirements. The present communication deals with the seeded player of arsenic contamination in groundwater, accumulation of the toxin in soils and rolls in the affected belt of West Bengal irrigated with contaminated groundwater, and in carnal tissues and products, and demonstrates the pathways, other than drinking water, through with(predicate) which arsenic may essential access to human, animal and roam systems.

The retention of arsenic by the soil organic share in the affected sites has been demonstrated, so also the reveal electric potential of As from the resulting organo-As complexes by the competing oxyanions such(prenominal) as orthophosphate and nitrate. The application of FYM and phosphate was found to live debate exploit on release of native and utilise arsenic in the contaminated soils, with FYM reduction such release, thereby concern to moderate the toxic effect of arsenic in soil-plant system. This agree well with the findings of a rice pot-culture experiment. Different crop plants raised in a crop cafeteria experiment exhibited change tendencies to stash arsenic in various plant part in the following sequence: root>stem>leaf>economic produce. The...If you necessitate to get a skilful essay, order it on our website: Ordercustompaper.com

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