Arsenic

Paper presented to the International collection on Water conjoin in Disasters held in Kolkata on 5-6 December 2002 ARSENIC pollution OF GROUNDWATER IN WEST BENGAL (INDIA): BUILD-UP IN SOIL-CROP SYSTEMS S. K. Sanyal1 and S. K. T. Nasar2 1 Department of rural chemistry and Soil Science, ability of Agriculture Main Campus, Mohanpur, 2 board of directors of Research, Bidhan Chandra Krishi Viswavidyalaya, Kalyani-741235, Nadia, due west Bengal, India Abstract A large part of the Bengal delta drainage basin restrain by the rivers Bhagirathi and Padma is alter by arsenous anhydride taint of groundwater of geogenic theme the exact order of geochemical reactions releasing arsenic from the aquifer sediments is mollify debated. lone(prenominal) less than 10% of the intact groundwater accounts for drinking purpose combat more than 90% is use for clothe-irrigational requirements. The present communication deals with the cum of arsenic contamination in groundwater, accumulation of the toxin in soils and operates in the affected belt of West Bengal irrigated with contaminated groundwater, and in sottish tissues and products, and demonstrates the pathways, other than drinking water, by means of which arsenic may lease access to human, animal and growth systems.

The retention of arsenic by the soil organic division in the affected sites has been demonstrated, so also the spark latent 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 debate matter on release of native and utilise arsenic in the contaminated soils, with FYM decrease such release, thereby lean to moderate the toxic effect of arsenic in soil-plant system. This concord well with the findings of a strain pot-culture experiment. Different crop plants raise in a crop cafeteria experiment exhibited change tendencies to hive up arsenic in diverse plant part in the following sequence: root>stem>leaf>economic produce. The...If you privation to get a safe essay, order it on our website: Orderessay

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