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SPECIALTIES
Biogeochemical
processes in aquatic systems
Environmental
Bio-Inorganic Geochemistry.
SELECTED
PUBLICATIONS
" XAS Speciation of
As in a Hyper-Accumulating Fern." Webb
S.M., Gaillard J.-F., Ma L, and Tu C. (2003). Environ.
Sci. Technol., 37, 754-760
"Evidence for a
Dynamic Cycle Between Mn and Co in the Water Column of a Stratified
Lake". Taillefert M., MacGregor B. J.,
Gaillard J.-F., Lienemann C.-P., Perret D., and Stahl D. A. (2002) Enviro.
Sci. Technol., 36, 468-476
"The
Diverstiy of Natural Hydrous Iron Oxides"
Perret D., Gaillard J.-F.,
Dominik J.,
and Atteia O. (2000). Environ. Sci. Technol., 34,
3540-3546.
"Zinc
Speciation in a Contaminated Aquatic Environment: Characterization of
Environmental
Particles by Analytical Electron Microscopy" Webb
S. M., Leppard G. G., and J.-F. Gaillard (2000). Environ. Sci.
Technol.,
34, 1926-1933.
"Speciation,
Reactivity, and Cycling of Fe and Pb in a Meromictic Lake" Taillefert
M., Lienemann C.-P., Gaillard J.-F., & D. Perret (2000) Geochim.
Cosmochim. Acta, 64, 169-183.
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Research
interests focus on biogeochemical processes in aquatic systems, with a
special emphasis on the chemical speciation of metals, and
metal-microbes
interactions. Our research group is conducting field studies,
laboratory
experiments, and modeling approaches to investigate the fate of metals
in natural waters. Our current activities are centered on the chemical
speciation of Zn, Cd, Pb and Cr in freshwater environments (water &
sediments), and soils.
To investigate the chemical speciation of metals, we are using an
analytical
multi-method approach relying on electrochemistry, electron
microscopy, and X-ray absorption spectroscopy. These
complementary techniques allows us respectively to determine the truly
dissolved metal fraction as well as the presence, concentrations, and
conditional
stability constants of dissolved ligands; probe elemental
associations
at the nano-scale; and establish the coordination and the valence
state of the metal using direct methods.
ACADEMIC
QUALIFICATIONS
M.S.T., 1979,
Environmental
Engineering, University of Savoie -France-.
Dr.,
1982, Water Sciences,
University Pierre et Marie Curie (Paris VI) -France-.
D. Sc.,
1987, Physical Sciences:
Geochemistry, University Denis Diderot (Paris 7) & Institut de
Physique
du Globe de Paris -France-.
PROFESSIONAL
EXPERIENCE
Maître
de Conférences,
Dept. of Chemistry, University Denis Diderot (Paris 7)
Chief
Scientist, Southern Ocean
France-JGOFS
Associate
Editor: Journal
of Hydrology.
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