- Management Committee Member for France of the COST Action ES1205 ENTER The transfer of engineered nanomaterials from wastewater treatment ; stormwater to rivers [ www.es1205.eu ]

- Coordinator for Univ. Paris-Diderot of the Erasmus Mundus doctoral program Environmental Technologies for Contaminated Solids, Soils and Sediments (ETeCoS3)
[ www.internationaldoctorate.unicas.it ]

- Authoring activity for the ANSES Scient. Watch Report on NanoPhysical Agents

- Management Committee Member of the LISA/IPGP High Resolution ICP-MS
[ www.es1205.eu ]

- Session convener at the AGU 2011 Fall Meeting, 5-9 Dec. 2011, San Francisco, California, B54D Spectroscopic and Isotopic Techniques: From Biogeochemical Cycles Comprehension to Biomedical Applications

- Organizing committee of Isotrace 2011 and 2012 Workshops, Sept. 2011-12, Paris and Oléron,France. Trace elements and radiogenics isotopes analyses in Earth Sciences

- Memb. of European NORMAN Network WG4 -Engineered Nanomaterials in the Environment

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