
L'ouvrage fait le point des connaissances sur la biogéochimie, la biodégradation et l'écotoxicologie dans le milieu aquatique de deux familles de tensio-actifs : les las (alkylbenzènesulfonates linéaires) et les ape (alkylphénols éthoxylés). Il présente les méthodes d'analyse, et les niveaux de concentration dans les effluents urbains, les eaux douces, les eaux marines et les sédiments. Il expose les données relatives aux taux et aux vitesses de biodégradation, les mécanismes biochimiques de ce processus et les niveaux de concentration qui entraînent des effets de toxicité aiguë et chronique dans les organismes aquatiques. La conclusion contient des recommandations relatives à certains aspects du devenir des las et des ape dans le milieu naturel qui doivent être mieux connus.
This report reviews the current knowledge about biogeochemistry, biodegradation and ecotoxicology in the aquatic environment of two families of surfactants: the LAS (linear alkylbenzene sulfonates) and APE (alkylphenols ethoxylates). The analytical methods are described. Data are given on concentration levels in sewage. effluents, in freshwaters, in marine waters and in sediments. Datas are also given on biodegradation rates; biochemical pathways and explained. Finally, concentrations levels bringing about acute and chronic toxic effects are given. The conclusion contains some recommendations about some aspects of the environmental fate of LAS and APE which must be further investigated.
Non ionique, Anionique, APE, Biogeochemistry, Ecotoxicologie, Biodégradation, Ecotoxicology, Nonionic, LAS, Surfactant, Tensio actif,, Anionic, Biogéochimie
Non ionique, Anionique, APE, Biogeochemistry, Ecotoxicologie, Biodégradation, Ecotoxicology, Nonionic, LAS, Surfactant, Tensio actif,, Anionic, Biogéochimie
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