Biotransformation of the pesticide sodium arsenate

Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
M ShariatpanahiR F Wilkinson

Abstract

Biotransformation is an important parameter in assessing the environmental impact and fate of pesticides since metabolites produced may be either more or less toxic than the parent compound. Sodium arsenate (+5 inorganic), the wood preservative and insecticide, may be converted to both inorganic (+3) and organic compounds (-3) by microorganisms in soil, sediment and water bodies. Biotransformation of sodium arsenate was studied in pure cultures of 5 bacterial species using a mineral salt and limited carbon source medium. Arsenate concentrations were 10 microgram/ml and 100 microgram/ml of arsenic respectively. The rate of biodegradation of the parent compound was described by a first order composite exponential equation of the form Ct = C1e-k1t+C2e-k2t. Rates of production of metabolites (arsenite, monomethylarsine, dimethylarsine and trimethylarsine) were described by a first order exponential equation of the form Ct = Co (1-e-kt).

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Jun 1, 2002·Microbiology and Molecular Biology Reviews : MMBR·Ronald Bentley, Thomas G Chasteen
Jan 25, 2014·Environmental Science and Pollution Research International·Andrea GaionDaniele Fattorini
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May 6, 2021·Environmental Science and Pollution Research International·Lina LinZhengguo Song

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