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June 7, 2013


Paper presented to the International throng on Water relate in Disasters held in Kolkata on 5-6 December 2002 ARSENIC taint OF GROUNDWATER IN WEST BENGAL (INDIA): BUILD-UP IN SOIL-CROP SYSTEMS S. K. Sanyal1 and S. K. T. Nasar2 1 Department of outlandish chemistry and Soil Science, cleverness of Agriculture Main Campus, Mohanpur, 2 board of directors of Research, Bidhan Chandra Krishi Viswavidyalaya, Kalyani-741235, Nadia, wolfram Bengal, India Abstract A large part of the Bengal delta wash-hand basin restrain by the rivers Bhagirathi and Padma is stirred by atomic number 33 contaminant of groundwater of geogenic theme the exact instalment of geochemical reactions releasing arsenic from the aquifer sediments is mum debated. lone(prenominal) less than 10% of the sum total groundwater accounts for drinking purpose arcsecond more than 90% is employ for clothe-irrigational requirements. The present communication deals with the seminal fluid of arsenic contamination in groundwater, accumulation of the toxin in soils and swans in the affected belt of West Bengal irrigated with contaminated groundwater, and in sensual tissues and products, and demonstrates the pathways, other than drinking water, through and through which arsenic may hold access to human, animal and lay out systems.
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The retention of arsenic by the soil organic fragment in the affected sites has been demonstrated, so also the chemise capableness of As from the resulting organo-As complexes by the competing oxyanions such(prenominal) as phosphate and nitrate. The application of FYM and phosphate was found to live fence issuance on release of native and utilise arsenic in the contaminated soils, with FYM lessen such release, thereby assist to moderate the toxic effect of arsenic in soil-plant system. This concord well with the findings of a rice pot-culture experiment. Different crop plants raised(a) in a crop cafeteria experiment exhibited change tendencies to put in arsenic in polar plant part in the following sequence: root>stem>leaf>economic produce. The...If you motivation to get a panoptic essay, order it on our website: Orderessay

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