부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.envpol.2009.04.005 Byline: Pascale Besse-Hoggan (a), Tatiana Alekseeva (b)(c), Martine Sancelme (a), Anne-Marie Delort (a), Claude Forano (c) Abstract: The fate of pesticides in the environment is strongly related to the soil sorption processes that control not only their transfer but also their bioavailability. Cationic (Ca-bentonite) and anionic (Layered Double Hydroxide) clays behave towards the ionisable pesticide atrazine (AT) sorption with opposite tendencies: a noticeable sorption capacity for the first whereas the highly hydrophilic LDH showed no interactions with AT. These clays were modified with different humic acid (HA) contents. HA sorbed on the clay surface and increased AT interactions. The sorption effect on AT biodegradation and on its metabolite formation was studied with Pseudomonas sp. ADP. The biodegradation rate was greatly modulated by the material's sorption capacity and was clearly limited by the desorption rate. More surprisingly, it increased dramatically with LDH. Adsorption of bacterial cells on clay particles facilitates the degradation of non-sorbed chemical, and should be considered for predicting pesticide fate in the environment. Author Affiliation: (a) Laboratoire de Synthese et Etude de Systemes a InterA*t Biologique, UMR-CNRS 6504, Universite Blaise Pascal, 63177 Aubiere Cedex, France (b) Institute of Physical, Chemical and Biological Problems of Soil Science, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russia (c) Laboratoire des Materiaux Inorganiques, UMR-CNRS 6002, Universite Blaise Pascal, 63177 Aubiere Cedex, France Article History: Received 9 January 2009; Revised 7 April 2009; Accepted 11 April 2009