Microbial and photolytic degradation of the herbicide acetochlor

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16 Citations (Scopus)

Abstract

Time-course of the microbial degradation of the herbicide acetochlor was studied in commercial black mold and products of degradation were followed using gas chromatography-mass spectrometry (GC-MS). After 1-year-exposure in soil only 9% of the parent molecule was found and two metabolites were identified. The estimated half-life (t(1/2)) of the acetochlor was approximately 90 days. In photolytic degradation studies irradiation of acetochlor resulted in 50% conversion of the parent molecule yielding at least six products, of which five photoproducts accounted for 43% were tentatively identified using GC-MS and their structures were confirmed by chemical synthesis. Products formed by microbial degradation were less phytotoxic to maize, oat and ryegrass seedlings than parent acetochlor.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalInternational Journal of Environmental Analytical Chemistry
Volume78
Issue number1
Publication statusPublished - 2000

Fingerprint

acetochlor
Herbicides
photolysis
biodegradation
herbicide
herbicides
Degradation
degradation
Gas chromatography
Gas Chromatography-Mass Spectrometry
Mass spectrometry
gas chromatography
mass spectrometry
Lolium
Molecules
Metabolites
Seedlings
half life
Zea mays
Half-Life

Keywords

  • Acetochlor
  • Metabolism
  • Photolysis
  • Soil

ASJC Scopus subject areas

  • Analytical Chemistry
  • Environmental Science(all)
  • Environmental Chemistry

Cite this

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abstract = "Time-course of the microbial degradation of the herbicide acetochlor was studied in commercial black mold and products of degradation were followed using gas chromatography-mass spectrometry (GC-MS). After 1-year-exposure in soil only 9{\%} of the parent molecule was found and two metabolites were identified. The estimated half-life (t(1/2)) of the acetochlor was approximately 90 days. In photolytic degradation studies irradiation of acetochlor resulted in 50{\%} conversion of the parent molecule yielding at least six products, of which five photoproducts accounted for 43{\%} were tentatively identified using GC-MS and their structures were confirmed by chemical synthesis. Products formed by microbial degradation were less phytotoxic to maize, oat and ryegrass seedlings than parent acetochlor.",
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AB - Time-course of the microbial degradation of the herbicide acetochlor was studied in commercial black mold and products of degradation were followed using gas chromatography-mass spectrometry (GC-MS). After 1-year-exposure in soil only 9% of the parent molecule was found and two metabolites were identified. The estimated half-life (t(1/2)) of the acetochlor was approximately 90 days. In photolytic degradation studies irradiation of acetochlor resulted in 50% conversion of the parent molecule yielding at least six products, of which five photoproducts accounted for 43% were tentatively identified using GC-MS and their structures were confirmed by chemical synthesis. Products formed by microbial degradation were less phytotoxic to maize, oat and ryegrass seedlings than parent acetochlor.

KW - Acetochlor

KW - Metabolism

KW - Photolysis

KW - Soil

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