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Low water transport in fractal microstructure of tropical soils: application to chlordecone pesticide trapping

Woignier Thierry, Morell Marc, Morell Olivija, Duffours Laurent, Soler Alain. 2011. Low water transport in fractal microstructure of tropical soils: application to chlordecone pesticide trapping. Ecohydrology and Hydrobiology, 11 (1-2) : pp. 121-128.

Journal article ; Article de revue à comité de lecture
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Abstract : Chlordecone, a toxic organochlorine insecticide, is a major long term source of pollution of soils and water resources in West Indies. Allophanic soils have been strongly polluted and we show that the clay microstructure should be an important physicochemical characteristic limiting the transfer of the pesticide in water. We demonstrate the fractal structure of the allophane clay, at the nanoscale and show that it exist a correlation between the allophane fractal structure and the poor pesticides transfer from allophanic clay to water. We propose that the fractal features and associated poor low transport properties could explain why allophane clay is able to retain pesticides. Comparatively, these allophanic clays could be highly polluted but less contaminant for water resources and diffusion in environment. (Résumé d'auteur)

Mots-clés Agrovoc : Chlordécone, Pollution par l'agriculture, Pollution de l'eau souterraine, Pesticide, Sol tropical, Structure du sol, Argile, Andosol, Diffusion

Mots-clés géographiques Agrovoc : Martinique

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

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

Auteurs et affiliations

  • Woignier Thierry, PRAM (MTQ)
  • Morell Marc, IRD (MTQ)
  • Morell Olivija
  • Duffours Laurent
  • Soler Alain, CIRAD-PERSYST-UPR Systèmes de culture bananes et ananas (MTQ)

Autres liens de la publication

Source : Cirad - Agritrop (https://agritrop.cirad.fr/563414/)

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