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Comparative fate of an organochlorine, chlordecone, and a related compound, chlordecone-5b-hydro, in soils and plants

Clostre Florence, Cattan Philippe, Gaude Jean-Marie, Carles Céline, Letourmy Philippe, Lesueur Jannoyer Magalie. 2015. Comparative fate of an organochlorine, chlordecone, and a related compound, chlordecone-5b-hydro, in soils and plants. Science of the Total Environment, 532 : pp. 292-300.

Journal article ; Article de recherche ; Article de revue à facteur d'impact
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Quartile : Q1, Sujet : ENVIRONMENTAL SCIENCES

Abstract : We address the problem of the comparative environmental fate of a pesticide, chlordecone (CLD), and a related compound, chlordecone-5b-hydro (CLD-5b-hydro). We used a large database including data from two types of contaminated volcanic soils, andosol and nitisol, and thirteen crops grown in the French West Indies in historically polluted soils. We performed in-depth statistical analysis of the effect of different parameters (soil type, crop, organ, etc.) on the ratio of CLD-5b-hydro to CLD in both soils and plants. The environmental fate of the two compounds differed depending on the type of soil. Proportionally, more CLD-5b-hydro than CLD was measured in nitisols than in andosols. Compared to CLD, we also found a preferential transfer of CLD-5b-hydro from the soil to the plant. Finally, mobilization of the two compounds differed according to the species of crop but also within the plant, with increasing ratios from the roots to the top of the plant. The properties of the compound played a key role in the underlying processes. Because CLD-5b-hydro is more soluble in water and has a lower Kow than CLD, CLD-5b-hydro (1) was more easily absorbed from soils by plants, (2) was less adsorbed onto plant tissues and (3) was transported in greater quantities through the transpiration stream. Due to the amounts of CLD-5b-hydro we measured in some plant parts such as cucurbit fruits, an assessment of the toxicity of this CLD monodechlorinated product is recommended. (Résumé d'auteur)

Mots-clés Agrovoc : Persistance des pesticides, Chlordécone, Composé organochlore, Contamination chimique, Pollution du sol, Pollution par l'agriculture, Plante de culture, Sol volcanique, Andosol, Facteur édaphique, Composition chimique, Pesticide, Musa

Mots-clés géographiques Agrovoc : Antilles françaises, Martinique, Guadeloupe

Mots-clés complémentaires : Nitisol

Mots-clés libres : Persistent organic pollutant, Dechlorinated product, Preferential uptake, Plant contamination, Environmental factors, Volcanic soils

Classification Agris : P02 - Pollution
H01 - Protection of plants - General aspects
P33 - Soil chemistry and physics
F60 - Plant physiology and biochemistry

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

Auteurs et affiliations

  • Clostre Florence, PRAM (MTQ)
  • Cattan Philippe, CIRAD-PERSYST-UPR Systèmes de culture bananes et ananas (GLP)
  • Gaude Jean-Marie, PRAM (MTQ)
  • Carles Céline, PRAM (MTQ)
  • Letourmy Philippe, CIRAD-PERSYST-UPR AIDA (FRA) ORCID: 0000-0003-1040-0860
  • Lesueur Jannoyer Magalie, CIRAD-PERSYST-UPR HortSys (MTQ)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/576645/)

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