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Title: The extractability and mineralisation of cypermethrin aged in four UK soils
Authors: Fenlon, Katie A 
Andreou, Kostas 
Jones, Kevin C 
Semple, Kirk T 
Major Field of Science: Natural Sciences;Agricultural Sciences
Field Category: Earth and Related Environmental Sciences
Keywords: Bound residue;Cypermethrin;HPCD;Mineralisation
Issue Date: Jan-2011
Source: Chemosphere, 2011, vol. 82, no. 2, pp. 187-192
Volume: 82
Issue: 2
Start page: 187
End page: 192
Journal: Chemosphere 
Abstract: Cypermethrin is a widely used insecticide that has caused concern due to its toxicity in the aquatic environment. As with all land applied pesticides, the most significant source of water pollution is from the soil, either due to leaching or washoff. The behaviour of cypermethrin in the soil controls the likelihood of future pollution incidents, with two of the most significant processes being the formation of bound residues and microbial degradation. The formation of bound residues and mineralisation was measured in four organically managed soils from the UK. The formation of bound residues was measured using three different extraction solutions, 0.01 M CaCl₂, 0.05 M HPCD and acetonitrile. Biodegradation was assessed by measurement of mineralisation of cypermethrin to CO₂. The formation of bound residues varied according to extraction method, soil type and length of ageing. In two of the four soils studied, acetonitrile extractability decreased from 100% initially to 12-14% following 100 d ageing. The extent of mineralisation increased after 10-21 d ageing, reaching 33% of remaining activity in one soil, however following 100 d ageing the extent of mineralisation was significantly reduced in three out of the four soils. As with the formation of bound residues, mineralisation was impacted by soil type and length of ageing.
ISSN: 00456535
DOI: 10.1016/j.chemosphere.2010.10.025
Rights: © Elsevier
Type: Article
Affiliation : Lancaster University 
Cyprus University of Technology 
Appears in Collections:Άρθρα/Articles

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