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Use of fluorescence spectroscopy and voltammetry for the analysis of metal-organic matter interactions in the New Caledonia lagoon
Merdy P., Bonnefoy A., Martias C., Garnier C., Huclier S.
International Journal of Environmental Analytical Chemistry (2012) 868-893 - http://hal.in2p3.fr/in2p3-00679672
Chimie/Radiochimie
Planète et Univers/Sciences de la Terre/Géochimie
Sciences de l'environnement/Milieux et Changements globaux
Use of fluorescence spectroscopy and voltammetry for the analysis of metal-organic matter interactions in the New Caledonia lagoon
P. Merdy1, A. Bonnefoy1, C. Martias1, C. Garnier1, S. Huclier2
1 :  PROTEE - PROcessus de Transfert et d'Echanges dans l'Environnement
http://protee.univ-tln.fr/
Université de Toulon : EA3819
Université de Toulon - BP 20132 83957 La Garde cedex
France
2 :  SUBATECH - Laboratoire SUBATECH Nantes
http://www-subatech.in2p3.fr/
CNRS : UMR6457 – IN2P3 – Université de Nantes – École Nationale Supérieure des Mines - Nantes
4, rue Alfred Kastler - 44070 Nantes Cedex 03
France
Fluorescence, polarographic and potentiometric analysis of sea water from the New Caledonia lagoon (located south of Noumea) allowed the determination of the specific properties of the dissolved and particulate phases of organic matter (OM)-metal complexes according to various regions of the lagoon. In particular, OM complexes with Ni, Zn, Pb, Cu, Cd were chosen in this study due to the sensitivity of these complexes to affect biocenosis of the nearby enclosed coral reef as well as their availability to enter the coast from erosion (terrigenous OM) or human activities from nickel extraction or pollution from waste sites (anthopogenic OM) that exist throughout New Caledonia. Combined with geochemical modelling, the OM-metal complexes analysis allowed the determination of their conditional stability constants which in turn helped in predicting the fate of the metal pollution in the lagoon. For the first time, fluorescence, polarographic and potentiometric techniques combined with geochemical models that employed discrete pKa distribution on OM enabled the determination of the origin of the OM, as either natural or anthopogenic.

Articles dans des revues avec comité de lecture
2012
International Journal of Environmental Analytical Chemistry
Publisher Taylor & Francis: STM, Behavioural Science and Public Health Titles
ISSN 0306-7319 (eISSN : 1029-0397)
868-893

SUBATECH-Radiochimie