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Enantiomeric fraction and isomeric composition to assess sources of DDT residues in soils

AutorBosch, Carme; Grimalt, Joan O.; Fernandez, P.
Palabras claveChiral pesticides
DDT pollution in soils
Dicofol
Enantiomeric fraction
O,p'-DDT
Fecha de publicación1-nov-2015
EditorElsevier
CitaciónChemosphere 138: 40-46(2015)
ResumenChiral pesticides such as o,p'-DDT can undergo enantioselective microbial degradation in soil. Hence, the enantiomeric fraction (EF) of o,p'-DDT was used as an approach to assess potential recent inputs of DDT in the lower part of the Ebro River basin (NE Spain), a region heavily impacted by agricultural and industrial activities, including a dicofol production and a chloro-alkali plants. The EFs of five out of nineteen soils were not different from the racemic value (0.505. ±. 0.010), confirming that the Ebro River and some of its tributaries, Segre and Cinca rivers, transported fresh DDT residues despite its ban in Spain during the 90s. o,p'-DDT/. p,p'-DDT ratios in soils suggest that recent use of technical DDT and/or DDT-contaminated dicofol may be responsible for the fresh DDT inputs in the Segre River, while in the Ebro River, they indicate a dominant contribution of technical DDT, likely related to the residues accumulated by the chloro-alkali plant discharges. © 2015 Elsevier Ltd.
Versión del editorhttp://dx.doi.org/10.1016/j.chemosphere.2015.05.047
URIhttp://hdl.handle.net/10261/135224
DOI10.1016/j.chemosphere.2015.05.047
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