Affordable Access

Biotransformation of the pesticide sodium arsenate.

Authors
Type
Published Article
Journal
Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes
Publication Date
Volume
16
Issue
1
Pages
35–47
Identifiers
PMID: 7009715
Source
Medline
License
Unknown

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).

Statistics

Seen <100 times