Saaidi Pierre-Loïc, Grünberger Olivier, Samouëlian Anatja, Le Roux Yves, Richard Antoine, Devault Damien A, Feidt Cyril, Benoit Pierre, Evrard Olivier, Imfeld Gwenaël, Mouvet Christophe, Voltz Marc
Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, 91000, Evry, France.
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.
Environ Pollut. 2023 May 1;324:121283. doi: 10.1016/j.envpol.2023.121283. Epub 2023 Feb 17.
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.
最近，孔特等人（2022年）通过在卡比多什等人（2009年）开发的WISORCH模型中引入一个额外的“消散参数”，重新审视了法国西印度群岛（FWI）土壤中十氯酮（CLD）的自然降解情况。孔特等人获得的FWI土壤中CLD浓度的最新数据集使他们能够优化模型参数，从而得出比原始模型中污染持久性估计值显著更短的结果。他们的结论危及了FWI土壤中CLD降解非常有限这一范式，这可能导致对CLD污染管理的全面修订。然而，我们认为他们的研究在几个重要方面存在问题。这包括数据集中和建模方法中的潜在偏差。这导致作者确定的CLD五年估计消散半衰期（DT50）与1972年至1993年应用期至今CLD在土壤中的归宿之间存在不一致。最重要的是，孔特等人提出的CLD在田间的快速消散没有得到数据和估计的充分支持。因此，CLD在FWI土壤中长期存在的范式仍需考虑。
