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Approche alternative du lavage de sols pollués par des hydrocarbures aromatiques polycycliques : utilisation des cyclodextrines avec procédés de recyclage

Abstract : Manufactured Gas Plants sites are mostly contaminated by Polycyclic Aromatic Hydrocarbons (PAHs) under the form of hydrophobic coal tar. Soil washing often uses surfactants or organic solvents, which have a significant environmental impact. This PhD work proposes an alternative way, based on seminatural, non-toxic and easily biodegradable cage-like molecules, β-cyclodextrins. They are able to solubilize hydrophobic molecules, as PAHs, thus extracted them from soil. In order to minimize products costs, a cyclodextrin recycling method, was successfully tested. Several experiments have been done, on a panel of former industrial sites soils, at laboratory and semi-pilot scale, with two conclusive trials of the full extraction process in a continuous mode. Comparison with existing methods indicates that the use of cyclodextrins is in most cases a better method than the ones based on surfactants or organic solvent, according to the current legislation (1996 European Directive IPPC).
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https://tel.archives-ouvertes.fr/tel-00784723
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Submitted on : Monday, February 4, 2013 - 3:31:54 PM
Last modification on : Wednesday, June 24, 2020 - 4:18:33 PM
Long-term archiving on: : Saturday, April 1, 2017 - 3:51:13 PM

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  • HAL Id : tel-00784723, version 1

Citation

Christophe Viglianti. Approche alternative du lavage de sols pollués par des hydrocarbures aromatiques polycycliques : utilisation des cyclodextrines avec procédés de recyclage. Sciences de l'environnement. Ecole Nationale Supérieure des Mines de Saint-Etienne, 2007. Français. ⟨NNT : 2007EMSE0019⟩. ⟨tel-00784723⟩

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