Kinetic analysis of enhanced biodegradation of carbofuran

Journal Article · Wed Feb 28 23:00:00 EST 1990 · Journal of Agricultural and Food Chemistry; (USA)

DOI:https://doi.org/10.1021/jf00093a068· OSTI ID:6524601

Scow, K M; Merica, R R; Alexander, M ^[1]

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1. Cornell Univ., Ithaca, NY (USA)

Mineralization of 0.01, 0.1, 5.0, and 50 mg of carbonyl-{sup 14}C-labeled 2,3-dihydro-2,2-dimethylbenzofuran-7-yl methylcarbamate (carbofuran) per kilogram of soil was measured in soil that had not been exposed to the pesticide and in soil that had been previously treated with the same concentrations of carbofuran. The stimulation in mineralization rate as a result of previous treatment of the soil with carbofuran was not the result of a substantial increase in the size of the microbial population able to use the compound, as indicated by most probable number counts. Of the Monod (single-substrate) and dual-substrate models of biodegradation kinetics, model I of the dual-substrate models provided the best fit to all curves of mineralization of carbonyl-labeled carbofuran. The fact that model I fit the data supports the hypothesis that the microorganisms mineralizing the carbonyl-labeled molecule do not grow at the expense of the methylcarbamate moiety. This study demonstrates the usefulness of kinetic models for characterizing microbial processes in soil.

• OSTI ID: 6524601
• Journal Information: Journal of Agricultural and Food Chemistry; (USA), Journal Name: Journal of Agricultural and Food Chemistry; (USA) Vol. 38:3; ISSN 0021-8561; ISSN JAFCA
• Country of Publication: United States
• Language: English

Related Subjects

553003* -- Agriculture & Food Technology-- Pest & Disease Control-- (1987-)
60 APPLIED LIFE SCIENCES
BIOCHEMICAL REACTION KINETICS
BIODEGRADATION
CARBON 14 COMPOUNDS
CHEMICAL REACTIONS
DECOMPOSITION
INSECTICIDES
ISOTOPE APPLICATIONS
KINETICS
LABELLED COMPOUNDS
MINERALIZATION
PESTICIDES
REACTION KINETICS
SOILS
TRACER TECHNIQUES