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Study of a vertical profile of pre-emergence herbicide contamination in Middle Garonne sediments

Devault, Damien A. and Ith, Chumnan and Merlina, Georges and Lim, Puy and Pinelli , Eric Study of a vertical profile of pre-emergence herbicide contamination in Middle Garonne sediments. (2010) International Journal of Environmental Analytical Chemistry , vol. 90 (n° 3-6). pp. 311-320. ISSN 0306-7319

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Official URL: http://dx.doi.org/10.1080/03067310902803383

Abstract

The fate of pre-emergence herbicides was investigated in sediment cores at sites selected for their nested sedimentation rates. Sediment was segregated in the coarse fraction (>63 µm) and in clays and silts (<63 µm) from the surface to a 45-cm depth. The fine fraction was more contaminated than the coarse fraction, mainly because of desethylatrazine (DEA). However, pesticides were observed in sediments at depths dated to before these compounds were used. Contaminated ancient sediments showed that contaminated elements migrated into the sediment. The fine fraction DEA profile was associated with the chronology of atrazine use. Comparing the sediment age, the half-life of the pesticides studied and banning dates showed that a non-degraded pesticide stock can be established in sediment.

Item Type:Article
Additional Information:Thanks to Taylor & Francis editor. The original PDF of the article can be found at International Journal of Environmental Analytical Chemistry website : http://www.informaworld.com/smpp/content~content=a919776401~db=all~jumptype=rss
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
French research institutions > Institut national de recherche en sciences et technologies pour l’environnement et l’agriculture - CEMAGREF
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By: Florence Amor
Deposited On:10 Sep 2010 12:03

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