%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Devault, D. A.
%A Laplanche, C.
%A Pascaline, H.
%A Bristeau, S.
%A Mouvet, C.
%A Macarie, Hervé
%T Natural transformation of chlordecone into 5b-hydrochlordecone in French West Indies soils : statistical evidence for investigating long-term persistence of organic pollutants
%B Crop protection and environmental health : legacy management and new concepts
%D 2016
%E Devault, D.A.
%E Macarie, Hervé
%E Lemoine, S.
%L fdi:010066130
%G ENG
%J Environmental Science and Pollution Research
%@ 0944-1344
%K Kepone ; Curlone ; Pesticides ; Banana ; Martinique ; Hierarchical Bayesian ; modelling ; Data censoring
%K MARTINIQUE
%M ISI:000368199300010
%N 1
%P 81-97
%U https://www.documentation.ird.fr/hor/fdi:010066130
%> https://www.documentation.ird.fr/intranet/publi/2016/02/010066130.pdf
%V 23
%W Horizon (IRD)
%X Chlordecone (CLD) was an organochlorine insecticide whose previous use resulted in an extensive pollution of the environment with severe health effects and social consequences. A closely related compound, 5b-hydrochlordecone (5b-hydroCLD), has been searched for and often detected in environmental matrices from the geographical area where CLD was applied. The current consensus considered that its presence was not the result of a biotic or abiotic dechlorination of CLD in these matrices but rather the consequence of its presence as impurity (synthesis by-product) in the CLD released into the environment. The aim of the present study was to determine if and to what extent degradation of CLD into 5b-hydroCLD occurred in the field. To test this hypothesis, the ratios of 5b-hydroCLD and CLD concentrations in a dataset of 810 soils collected between 2006 and 2012 in Martinique were compared to the ratios measured in 3 samples of the CLD dust commercial formulations applied in the banana fields of French West Indies (FWI) and 1 sample of the technical-grade CLD corresponding to the active ingredient used in such formulations. Soil data were processed with a hierarchical Bayesian model to account for random measurement errors and data censoring. Any pathway of CLD transformation into 5b-hydroCLD occurring over the long term in FWI soils would indeed change the ratio of 5b-hydroCLD/CLD compared to what it was in the initially applied formulations. Results showed a significant increase of the 5b-hydroCLD/CLD ratio in the soils-25 times greater in soil than in commercial formulations-which suggested that natural CLD transformation into 5b-hydroCLD over the long term occurred in these soils. Results from this study may impact future decisions for the remediation of the polluted areas.
%B Colloque Annuel du Groupement Français des Pesticides (GFP)
%8 2014/05/26-29
%$ 068 ; 076 ; 038 ; 020