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Reactivity and transfer of tributyl-tin and mercury in aquatic environments; Etude de la reactivite et du transfert du tributyletain et du mercure dans les environnements aquatiques

Abstract

Aquatic ecosystems are particularly affected by tributyl-tin (TBT) and mercury (Hg) chronic contamination. These micro-pollutants are ubiquitous and persistent and occurred at trace level, likely to drastically impair aquatic environments. TBT and Hg biogeochemical cycles are driven by transformation and transfer mechanisms between the different environmental compartments. These natural processes have been studied in details by using novel analytical methods and environmental design to improve the risk assessment. The first part of this work focus on the mechanistic study of TBT and Hg reactivity and transfer in reconstituted aquatic ecosystems. These experiments involve both state-of-the-art analytical speciation techniques, partly based on quantification by isotopic dilution and experimental tools simulating the environmental conditions. Kinetics of TBT and Hg distribution (adsorption, bioaccumulation, biodegradation, clearance) have been simultaneously characterized in all compartments of the microcosms presenting a simple biological organization. In a second step, volatilization kinetics of TBT at real interfaces have been studied to assess the potential remobilization and elimination pathways of butyl-tin compounds. Finally, in a third part, stable isotopic tracers of Hg have been employed to discriminate and quantify the coupled methylation and demethylation kinetics in estuarine sediments, by forcing different environmental factors (oxygenation, microbial activity). (author)
Authors:
Publication Date:
Dec 15, 2004
Product Type:
Thesis/Dissertation
Report Number:
FRNC-TH-6286
Resource Relation:
Other Information: TH: These chimie et microbiologie de l'eau; Available from Bibliotheque de l'Universite de Pau et des Pays de l'Adour. Section Sciences, Domaine Universitaire, 64000 - Pau (France)
Subject:
54 ENVIRONMENTAL SCIENCES; RESEARCH PROGRAMS; MERCURY; BIOGEOCHEMISTRY; ISOTOPE DILUTION; EVAPORATION; BIODEGRADATION; METHYLATION; AQUATIC ECOSYSTEMS; TRACE AMOUNTS; CHEMICAL REACTION KINETICS
OSTI ID:
20885981
Research Organizations:
Pau Univ. et des Pays de l'Adour, Institut National de l'Environnement Industriel et des Risques, 64 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR0604279
Availability:
Commercial reproduction prohibited; OSTI as DE20885981
Submitting Site:
FR
Size:
289 pages
Announcement Date:
Jul 13, 2007

Citation Formats

Tessier, E. Reactivity and transfer of tributyl-tin and mercury in aquatic environments; Etude de la reactivite et du transfert du tributyletain et du mercure dans les environnements aquatiques. France: N. p., 2004. Web.
Tessier, E. Reactivity and transfer of tributyl-tin and mercury in aquatic environments; Etude de la reactivite et du transfert du tributyletain et du mercure dans les environnements aquatiques. France.
Tessier, E. 2004. "Reactivity and transfer of tributyl-tin and mercury in aquatic environments; Etude de la reactivite et du transfert du tributyletain et du mercure dans les environnements aquatiques." France.
@misc{etde_20885981,
title = {Reactivity and transfer of tributyl-tin and mercury in aquatic environments; Etude de la reactivite et du transfert du tributyletain et du mercure dans les environnements aquatiques}
author = {Tessier, E}
abstractNote = {Aquatic ecosystems are particularly affected by tributyl-tin (TBT) and mercury (Hg) chronic contamination. These micro-pollutants are ubiquitous and persistent and occurred at trace level, likely to drastically impair aquatic environments. TBT and Hg biogeochemical cycles are driven by transformation and transfer mechanisms between the different environmental compartments. These natural processes have been studied in details by using novel analytical methods and environmental design to improve the risk assessment. The first part of this work focus on the mechanistic study of TBT and Hg reactivity and transfer in reconstituted aquatic ecosystems. These experiments involve both state-of-the-art analytical speciation techniques, partly based on quantification by isotopic dilution and experimental tools simulating the environmental conditions. Kinetics of TBT and Hg distribution (adsorption, bioaccumulation, biodegradation, clearance) have been simultaneously characterized in all compartments of the microcosms presenting a simple biological organization. In a second step, volatilization kinetics of TBT at real interfaces have been studied to assess the potential remobilization and elimination pathways of butyl-tin compounds. Finally, in a third part, stable isotopic tracers of Hg have been employed to discriminate and quantify the coupled methylation and demethylation kinetics in estuarine sediments, by forcing different environmental factors (oxygenation, microbial activity). (author)}
place = {France}
year = {2004}
month = {Dec}
}