Procédé de traitement in situ des sites pollués par réduction chimique à l'aide de micro et nanoparticules de fer zérovalent

Abstract : This thesis aims at a better understanding of mechanisms governing the efficiency of zerovalent iron (ZVI) particles in soil and groundwater remediation. In these processes ZVI is injected in situ as micro and/or nanoparticles slurry in areas contaminated by electron acceptor pollutants. At first, we characterized industrial powders and particles synthetized with green tea in the laboratory. In order to compare the reactivity of all the particles, a batch test has been carried out with nitrate solution. Differences in pathways and kinetic reduction have been exhibited. Secondly, we combined ZVI with sodium thiosulfate to investigate hexavalent chromium degradation (soil and water matrices). The results are conclusive and were used to design a pilot on a Soléo Services site. Finally, remediation cases of sites contaminated by chlorinated solvents have been investigated. Lab experiments have been run to explain the influence of operating conditions on the treatment efficacy
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Tanina Kabeche. Procédé de traitement in situ des sites pollués par réduction chimique à l'aide de micro et nanoparticules de fer zérovalent. Autre. Université de Lorraine, 2014. Français. ⟨NNT : 2014LORR0034⟩. ⟨tel-01750680⟩

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