Long-term pollution by chlordecone of tropical volcanic soils in the French West Indies: a simple leaching model accounts for current residue

Cabidoche Yves-Marie, Achard Raphaël, Cattan Philippe, Clermont Dauphin Claridge, Massat F., Sansoulet Julie. 2009. Long-term pollution by chlordecone of tropical volcanic soils in the French West Indies: a simple leaching model accounts for current residue. Environmental Pollution, 157 : 1697-1705.

Quartile : Q1, Sujet : ENVIRONMENTAL SCIENCES

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Chlordecone was applied between 1972 and 1993 in banana fields of the French West Indies. This resulted in long-term pollution of soils and contamination of waters, aquatic biota, and crops. To assess pollution level and duration according to soil type, WISORCH, a leaching model based on first-order desorption kinetics, was developed and run. Its input parameters are soil organic carbon content (SOC) and SOC/water partitioning coefficient (Koc). It accounts for current chlordecone soil contents and drainage water concentrations. The model was valid for andosol, which indicates that neither physicochemical nor microbial degradation occurred. Dilution by previous deep tillages makes soil scrapping unrealistic. Lixiviation appeared the main way to reduce pollution. Besides the SOC and rainfall increases, Koc increased from nitisol to ferralsol and then andosol while lixiviation efficiency decreased. Consequently, pollution is bound to last for several decades for nitisol, centuries for ferralsol, and half a millennium for andosol.

Mots-clés Agrovoc : Musa, chlordécone, pollution par l'agriculture, persistance des pesticides, pollution de l'eau souterraine, pollution du sol

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

Classification Agris : P02 - Pollution
H01 - Protection des végétaux - Considérations générales
P33 - Chimie et physique du sol

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Cabidoche Yves-Marie, INRA (GLP)
• Achard Raphaël, CIRAD-PERSYST-UPR Systèmes bananes et ananas (MTQ)
• Cattan Philippe, CIRAD-PERSYST-UPR Systèmes bananes et ananas (GLP)
• Clermont Dauphin Claridge, INRA (GLP)
• Massat F., Conseil général (Drôme) (FRA)
• Sansoulet Julie, CIRAD-PERSYST-UPR Recyclage et risque (REU)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/548575/)

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