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Biologically-induced hydrolysis of parathion in soil: Kinetics and modelling

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1016/0038-0717(82)90029-3
AuteurRechercher : 1; Rechercher : ; Rechercher :
Affiliation
  1. Conseil national de recherches du Canada. Laboratoire régional des prairies
FormatTexte, Article
Résumé
The hydrolysis of the organophosphorus insecticide, parathion (O,O-diethyl O-p-nitrophenyl phosphorothioate) in a silty loam sierozem soil (Gilat, Israel) occurred primarily through microbial action. Parathion (labelled with ¹⁴C in the alkyl chain) was applied at levels of 10–160 μg dry soil¹⁴ to soil remoistened to 20% and incubated at 25°C for 8 days. Bacterial numbers increased to a maximum 4–5 days after application of parathion and the increase was proportional to the concentration of parathion added. The rate of hydrolysis of parathion per μg applied was independent of the concentration of parathion. A model developed to predict the relationship between parathion concentration, microbial numbers and hydrolysis kinetics was in general agreement with the data experimentally obtained. The course of decomposition of successive additions of parathion, determined experimentally and predicted by the model, was characterized by rapid hydrolysis of parathion and successive increases in bacterial numbers. A portion of the ¹⁴C applied in these experiments was strongly absorbed by the soil and was not used by the soil microorganisms during the incubation period tested.
Date de publication
Maison d’éditionElsevier
Dans
  • Soil Biology and Biochemistry 14, nº 3 (1982) : 223–227.
Langueanglais
Publications évaluées par des pairsOui
Identificateur0038071782900293
NRCC-19882
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Identificateur de l’enregistrement3835a4a4-a4cc-417d-83d6-52487e7e1181
Enregistrement créé2023-11-16
Enregistrement modifié2023-11-16
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