Doctor
Edouard Metzgeractual position
:
Assistant Teacher in Chemistry in Denis Diderot, Paris 7 University
PhD
Thesis
Title : "Cadmium
benthic transfer processes in two coastal environments, the Sepetiba Bay
(Brésil-RJ) and the Thau lagoon (France-34)". Advisors: Gérard
Sarazin, Didier Jézéquel and Sambasiva Patchineelam.
Abstract
The principal objective of this work was to characterize the behaviour
of cadmium in the sedimentary environment and exchanges with the water
column in two coastal regions which are characterized by organic-rich sediments
and strongly impacted by the human activity. Sepetiba Bay (RJ-Brazil) is
a tropical environment contaminated by a hydrometallurgical plant of zinc.
Thau lagoon (34-France) is a eutrophic Mediterranean lagoon where intensive
shellfish farming strongly influences the distribution of the particulate
organic carbon deposition in the lagoon. The diagenetic understanding of
the behaviour of Cd required the acquisition of various chemical parameters
sensitive to the redox conditions on various space and time scales. With
this intention, several techniques of sampling and measurement were performed
which allowed the observation on millimetre and centimetre scale of chemical
gradients. The important database made us to observe occasional or seasonal
changes affecting the geochemistry of the sediment. We could show that
in these systems, the strongly reducing conditions lead to effective sinks
for Cd from the water column. However, some observed processes generate
redox conditions within the sediment favouring the re-mobilisation of cadmium
into the pore water and diffusion towards the overlying water. Thus the
increase of oxygen penetration depth in the sediment allows an efficient
recycling of cadmium in the sediment of Thau while bio-irrigation and groundwater
inflow solubilize locally cadmium in the Sepetiba Bay.
Keywords
early diagenesis ; sediment-water interface ; trace metals ; redox ;
remobilization ; DGT ; DET ; mangrove ; lagoon ; bioturbation
Curriculum
Vitae: Formation Field training
classes Laboratory
training classes Teaching
Research
field trips
2000-2004
PhD,
Institut de Physique du Globe de Paris, Université Paris 7. Directeur
de Thèse: Gérard Sarazin, Encadrement scientifique: Didier
Jézéquel et Eric
Viollier.
1999-2000
Master
of Fondamental and Appled Geochemistry, Institut de Physique du Globe de
Paris, Université Paris 7
1998-1999
Graduation
in Earth Sciences, section Geology, UP7
1997-1998
Graduation
in Earth Sciences, section Gechemistry, UP7
1996-1997
Licence in
Earth Sciences, UP7
1994-1996
Elementary
and general universitary diplome in Natural Sciences, section Earth Sciences,
section Earth Sciences, UP7
1998-1999
Sources,
rivers and lakes geochemistry around Bort les Orgues, Massif Central, advisor
Gil Michard
Tectonics of Héric gorges, Hérault, advisor Jean Pascal
Cogné
1996-1997
1996-1997
« Stratigraphy in Normandy », « Cartography in Languedoc
», « Alpine geological cross section », advisor Jean
Marcoux
1995-1996
Introduction
to Geology in Languedoc, advisor Gérard Noiret
1999-2000
«
Voltammetric study of speciation of cadmium in East Manch estuaries »,
Laboratoire
de Géochimie des Eaux, advisors Didier Jézéquel
and Eric Viollier
1998-1999
1998-1999
« Temporal study of Seine geochemistry », Laboratoire
de Géochimie et Cosmochimie, IPGP-P7, advisor Jérôme
Gaillardet
1997-1998
«Rb-Sr
dating of a granit from Tibet», Laboratoire de Géochronologie,
IPGP-P7, under direction of Urs Shärer, managed by Catherine Carbonne
«Isotopic and chemical composition of volcanic gasses from the
Soufrière volcan», Laboratoire de Géochimie des Isotopes
Stables, IPGP-P7, under direction of Marc Javoy, managed by Pierre Agrinier
1995-1996
«Palynologic
study of sediments from Liban», Laboratoire de Paléobotanique
du MNHN, undr direction of Philippe Taquet, managed by Jean Dejax
2003-2004
"Water
Geochemistry", Master Géophysique de Surface et Subsurface, IPGP,
40h. Application of chemistry as a tool of geophysical prospection. Applied
problems
"Analytical Chemistry", graduation in Environmental Sciences, UP7,
40h. Analyse of a domestic water. Flame- AAS, spectrophotometry, Winkler
titration, potentiometry,…
2002-2003
«
Analytical geochemistry ateliers » graduation in Geochemistry, UFR
des Sciences Physiques de la Terre, UP7, 8h. Alkalinity measurement of
a fountain watezr using two methods, Gran titration and spectophotometry
2001-2002
«
Physico-chemistry of natural and polluted environments » maîtrise
de chimie, UFR de Chimie, UP7, 36h. Analyse of different mineral waters
by capillary electrophoresis, Ca and Sr determination by flame AAS in a
marine water, analyse of DOC of a domestic water, alkalinity measurement
of a marine water by Gran titration
2002-2003
SEPETIBA
2. November. Mobility of dissolved metals in a tropical mangrove, Itacuruça,
Brazil. Spring campain
SEPETIBA 3. February. Summer campain
MICROBENT 5. May. Benthic fluxes in Thau Lagoon, France. Different
spatial and temporal sampling scales.
2001-2002
SEPETIBA
1. January and February. Preliminary study of porewater in Sepetiba bay
and Itacuruça mangrove.
MICROBENT 1. December-January. Winter campain
MICROBENT 2. April-May. Spring campain
MICROBENT 3. August. Summer campain
2000-2001
Flux Benthique.
Preliminary study of porewater in Thau lagoon.
1999-2000
«MERCAUX
2 ». august 2000. Study of dissolved metallic contaminants
mobility in Seine estuary and Pays de Caux coast
Communications:
Accepted papers
Sedimentary
record of redox-sensitive elements (U, Mn, Mo) in a transitory anoxic basin
(the Thau lagoon, France).
F. Elbaz-Poulichet, J.-L. Seidel, D. Jézéquel, E.
Metzger , F. Prévot, C. Simonucci , G. Sarazin, E. Viollier,
H. Etcheber, J.-M. Jouanneau, O. Weber, O. Radakovitch.
Accepted in Marine Chemistry
Two-dimensional
determination of dissolved iron and sulfur species in marine sediment pore-waters
by thin-films based imaging. Thau lagoon (France).
D. Jézéquel , R. Brayner, E. Metzger, E. Viollier,
F. Prévot, F. Fiévet.
Accepted in Estuarine, Coastal and Shelf Science
Submitted papers
Pore waters
signature of biogeochemical processes in sediments of Thau lagoon (MICROBENT
program).
E. Metzger, C. Simonucci, D. Jézéquel, E. Viollier,
G. Sarazin, F. Prévot.
Submitted to Estuarine, Coastal and Shelf Sciences
Millimetre
scale alkalinity measurement in marine sediment using DET probe and colorimetric
determination.
E. Metzger, D. Jézéquel, E. Viollier, C. Simonucci, G.
Sarazin, F. Prévot.
Submitted to Limnology and oceanography, methods
Influence
of diagenetic processes in Thau lagoon on cadmium behavior and benthic
fluxes.
E. Metzger, D. Jézéquel, F. Elbaz-Poulichet, C.
Simonucci, E. Viollier, G. Sarazin, J.-L. Seidel, F.Prévot .
Submitted to Estuarine, Coastal and Shelf Sciences
Uranium immobilization
in coastal sediment.
C. Simonucci, E. Viollier, E. Metzger, G. Sarazin,
F. Prévot, P. Anschutz, P. Lecroart, G. Chaillou, F. Elbaz-Poulichet.
Submitted to Estuarine, Coastal and Shelf Sciences
Papers in preparation
Iodine internal
cycling in shallow marine sediment (Thau lagoon, France).
C. Simonucci, E. Viollier, E. Metzger, G. Sarazin, F.
Prévot.
To be submitted to Environmental Science & Technology
Geochemical
characterisation of porewater in two contrasted sites in the Sepetiba bay.
E. Metzger, S. Patchineelam, D. Jézéquel, G. Sarazin,
In prep.
Tide effects
on diagenetical processes in mangrove of Itacuruça.
E. Metzger, S. Patchineelam, D. Jézéquel, G. Sarazin,
In prep.
Interactions
between Oxygen, Iron and Sulfide Cycles and Relation with pH: a Microscale
Multitechnique Approach.
K. Dedieu, E. Metzger, C. Simonucci, C. Rabouille, D. Jézéquel,
E. Viollier,, G. Sarazin and F. Prévot, In prep.
Posters:
Spéciation du cadmium en mesure directe dans l'estuaire de la Seine. E. Metzger, D. Jézéquel, E. Viollier, F. Prévot et G. Sarazin (2001) Congrès des Doctorants de l'IPGP. 6-8 mars 2001. Paris. .pdf (100 ko)
Technologies in situ à haute résolution spatiale pour l'étude des processus biogéochimiques à l'interface eau-sédiment. D. Jézéquel, E. Viollier, C. Simonucci, E. Metzger, F. Prévot, D. Lavergne, M. Evrard et G. Sarazin. LGE. C. Rabouille et P. Lhenoret. LSCE. P. Anchutz et G. Chaillou. DGO. R. de Witt. LOB. (2002) Compte-rendu d'activités PNEC-ATI. .pdf (100 ko)
Biogeochemical Dynamics In Shallow Marine Sediments. D. Jézéquel, E. Viollier, E. Metzger, C. Simonucci, G. Sarazin, D. Lavergne, M. Evrard & F. Prévot,.LGE. C. Rabouille. LSCE. J.-J. Bourrand, LGIS (2002) BENTHIC DYNAMICS: IN-SITU SURVEILLANCE OF THE SEDIMENT-WATER INTERFACE Aberdeen, Scotland, March 25th - 29th, 2002. .pdf (1000 ko)
Kinetic study of uranium and iodine transport across the marine sediment-water interface. C. Simonucci, E. Viollier, D. Jézéquel, G. Sarazin, E. Metzger et F. Prévot. LGE. P. Anschutz. DGO. J.-J. Bourrand.LGIS. (2002). EGS 2002. Nice. .pdf (1000 ko)
Metals distribution obtained by gel probes through the sediment/water interface in a Mediterranean Lagoon. E. Metzger, D. Jézéquel, B. Muresan, C. Simonucci, E. Viollier, G. Sarazin, F. Prévot, M. Pèpe, D. Lavergne LGE, J.-J. Bourrand. LGIS. (2002). European Meeting on Environmental Chemistry, december 11-14 2002, Geneva, Switzeland. .pdf (1000 ko)
Les nouveaux
outils d'investigation des fluides sédimentaires superficiels: vers
des technologies in situ de haute résolution . C. Rabouille1,
D. Jézéquel2 E. Viollier2, P. Anschutz3,
R. De Wit4, K. Dedieu1,
E. Metzger2,G.
Chaillou3, C.Simonucci2,B. Muresan2 F.
Prévot2 et G. Sarazin2 (2003).
1LSCE, CEA-CNRS Gif-sur-Yvette ; 2LGE, Université
Denis Diderot-Paris 7 ; 3EPOC-DGO, Université Bordeaux
I ; 4EPOC-LOB Arcachon, Université Bordeaux I
Compte-rendu d'activités PNEC-ATI.
.pdf
(645 ko)
Oral presentations:
Spéciation du cadmium en mesure directe dans l'estuaire de la Seine. E. Metzger, D. Jézéquel, E. Viollier, F. Prévot et G. Sarazin (2001) XXIII Colloque de l'Union des Océanographes de France. 5-7 septembre 2001. Villeneuve d'Ascq. Résumé. Abstract.
Distribution du cadmium à l’interface eau-sédiment dans deux milieux côtiers: l’Étang de Thau (France) et la Baie de Sepetiba (Brésil). E. Metzger, D. Jézéquel, B. Muresan, C. Simonucci, E. Viollier, F. Prévot et G. Sarazin (2002) Congrès des Doctorants de l'IPGP. 19-21 mars 2002. Résumé.
Dynamique des contaminants dans le sédiment : mesure à haute résolution spatiale de la composition des eaux interstitielles au moyen de peepers gel. D Jézéquel, F Prévot, G Sarazin, E Viollier, E Metzger, C Simonucci, B Muresan, M Pèpe, D Lavergne J-J Bourrand. Colloquium Microbent Project. Gif s/Yvette. july 2002
Distribution du cadmium dans les eaux interstitielles des sédiments de l'Etang de Thau (France) et de la Baie de Sepetiba (Brésil). E. Metzger, D. Jézéquel, C. Simonucci, E. Viollier, F. Prévot S. Patchineelam et G. Sarazin (2003) Congrès des Doctorants de l'IPGP. 11-13 mars 2003. Résumé.
Diagenèse
précoce dans les sédiments de l’étang de Thau : impact
sur la mobilité des métaux .
E. Metzger, C. Simonucci,
D. Jézéquel, E. Viollier, G. Sarazin, F. Prévot. (2003)
Final Colloquium Microbent Project. Nantes. november 17-18 2003.
Résumé.