Document Detail


Pesticide degradation in a 'biobed' composting substrate.
MedLine Citation:
PMID:  12741520     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Pesticides play an important role in the success of modern farming and food production. However, the release of pesticides to the environment arising from non-approved use, poor practice, illegal operations or misuse is increasingly recognised as contributing to water contamination. Biobeds appear to offer a cost-effective method for treating pesticide-contaminated waste. This study was performed to determine whether biobeds can degrade relatively complex pesticide mixtures when applied repeatedly. A pesticide mixture containing isoproturon, pendimethalin, chlorpyrifos, chlorothalonil, epoxiconazole and dimethoate was incubated in biomix and topsoil at concentrations to simulate pesticide disposal. Although the data suggest that interactions between pesticides are possible, the effects were of less significance in biomix than in topsoil. The same mixture was applied on three occasions at 30-day intervals. Degradation was significantly quicker in biomix than in topsoil. The rate of degradation, however, decreased with each additional treatment, possibly due to the toxicity of the pesticide mixture to the microbial community. Incubations with chlorothalonil and pendimethalin carried out in sterile and non-sterile biomix indicated that degradation, rather than irreversible adsorption to the matrix, was the main mechanism responsible for the reduction in recovered residues. Results from these experiments suggest that biobeds offer a viable means of treating pesticide waste.
Authors:
Paul Fogg; Alistair B A Boxall; Allan Walker; Andrew A Jukes
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Pest management science     Volume:  59     ISSN:  1526-498X     ISO Abbreviation:  Pest Manag. Sci.     Publication Date:  2003 May 
Date Detail:
Created Date:  2003-05-13     Completed Date:  2003-12-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100898744     Medline TA:  Pest Manag Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  527-37     Citation Subset:  IM    
Affiliation:
Cranfield Centre for EcoChemistry, Shardlow Hall, Shardlow, Derby, DE72 2GN, UK. p.fogg@cranfield.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Biodegradation, Environmental
Kinetics
Pesticides / metabolism*
Soil / analysis*
Soil Pollutants / metabolism*
Time Factors
Water Pollution / prevention & control
Chemical
Reg. No./Substance:
0/Pesticides; 0/Soil; 0/Soil Pollutants

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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