Is a dissipation half-life of 5 years for chlordecone in soils of the French West Indies relevant?

Autor: Saaidi PL; Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, 91000, Evry, France. Electronic address: plsaaidi@genoscope.cns.fr., Grünberger O; Unité Mixte de Recherche sur les Interactions Sols-Agrosystèmes-Hydrosystèmes (LISAH), Université de Montpellier, INRAE, IRD, Institut Agro, 2 Place Viala, 34060 Cedex 1, Montpellier, France., Samouëlian A; Unité Mixte de Recherche sur les Interactions Sols-Agrosystèmes-Hydrosystèmes (LISAH), Université de Montpellier, INRAE, IRD, Institut Agro, 2 Place Viala, 34060 Cedex 1, Montpellier, France., Le Roux Y; Université de Lorraine, INRAE, URAFPA, F-54000 Nancy, France; Université de Lorraine-ENSAIA, Chaire Agrométha, 2 Avenue de la Forêt de Haye, 54500 Vandoeuvre-lès-Nancy, France., Richard A; UR ASTRO Agrosystème Tropicaux, INRAE, F-97170, Petit-Bourg, France., Devault DA; Département des Sciences et Technologies, Centre Universitaire de Formation et de Recherche de Mayotte, RN3, BP53, 97660, Mayotte, Dembeni, France., Feidt C; Université de Lorraine, INRAE, URAFPA, F-54000 Nancy, France., Benoit P; Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 91120, Palaiseau, France., Evrard O; Laboratoire des Sciences du Climat et de l'Environnement (LSCE/IPSL), Unité Mixte de Recherche 8212 (CEA-CNRS-UVSQ), Université Paris-Saclay, Gif-sur-Yvette, France., Imfeld G; Université de Strasbourg, CNRS, ENGEES, ITES UMR7063, F-67084 Strasbourg, France., Mouvet C; Retired from BRGM, Direction Eau, Environnement, Ecotechnologies, Orléans, France., Voltz M; Unité Mixte de Recherche sur les Interactions Sols-Agrosystèmes-Hydrosystèmes (LISAH), Université de Montpellier, INRAE, IRD, Institut Agro, 2 Place Viala, 34060 Cedex 1, Montpellier, France.
Jazyk: angličtina
Zdroj: Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2023 May 01; Vol. 324, pp. 121283. Date of Electronic Publication: 2023 Feb 17.
DOI: 10.1016/j.envpol.2023.121283
Abstrakt: Recently, Comte et al. (2022) re-examined the natural degradation of chlordecone (CLD) in the soils of the French West Indies (FWI) by introducing an additional 'dissipation parameter' into the WISORCH model developed by Cabidoche et al. (2009). Recent data sets of CLD concentrations in FWI soils obtained by Comte et al. enabled them optimizing the model parameters, resulting in significantly shorter estimates of pollution persistence than in the original model. Their conclusions jeopardize the paradigm of a very limited degradation of CLD in FWI soils, which may lead to an entire revision of the management of CLD contamination. However, we believe that their study is questionable on several important aspects. This includes potential biases in the data sets and in the modeling approach. It results in an inconsistency between the estimated dissipation half-life time (DT50) of five years that the authors determined for CLD and the fate of CLD in soil from the application period 1972-1993 until nowadays. Most importantly, a rapid dissipation of CLD in the field as proposed by Comte et al. is not sufficiently supported by data and estimates. Hence, the paradigm of long-term persistence of CLD in FWI soils is still to be considered.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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