Degradation of monocrotophos in soils
| Autor: | Vijay A.K.B. Gundi, B. R. Reddy |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis India Vertisol chemistry.chemical_compound Soil Alfisol Environmental Chemistry Soil Pollutants Public Health Environmental and Occupational Health Environmental engineering Agriculture General Medicine General Chemistry Biodegradation Pesticide Pollution Soil contamination Kinetics Biodegradation Environmental chemistry Environmental chemistry Monocrotophos Soil water Aerobie Environmental Pollution |
| Zdroj: | Chemosphere. 62(3) |
| ISSN: | 0045-6535 |
| Popis: | The degradation of a widely used organophosphorus insecticide, monocrotophos (dimethyl (E)-1-methyl-2-methylcarbamoyl vinyl phosphate) in two Indian agricultural soils at two concentration levels, 10 and 100 μg g −1 soil under aerobic conditions at 60% water-holding capacity at 28 ± 4 °C was studied in a laboratory. The degradation of monocrotophos at both concentrations in black vertisol and red alfinsol soils was rapid accounting for 96–98% of the applied quantity and followed the first-order kinetics with rate constants ( k ) of 0.0753 and 0.0606 day −1 and half-lives ( t 1/2 ) of 9.2 and 11.4 days, respectively. Degradation of monocrotophos in soils proceeded by hydrolysis with formation of N -methylacetoacetamide. Even three additions of monocrotophos at 10 μg g −1 soil did not result in its enhanced degradation. However, there was cumulative accumulation of N -methylacetoacetamide in soils pretreated with monocrotophos to the tune of 7–15 μg g −1 soil. Both biotic and abiotic factors were involved in degradation of monocrotophos in soils. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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