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Transfert et transport colloïdal de polluants métalliques
Applications en assainissement routier

Abstract : Impact of transport infrastructures, and more generally of urban spaces, on the environment is one of the ministry in load of the environment concerns. The runoff waters of urban impervious surfaces are composed of complex various pollutants. The topic of this work was to specify the colloidal fraction rôle on the mobility of trace elements in road runoff management. The study was performed at the scale of an infiltration basin equipped to collect and qualify the waters from the road to interstitial volume in the sediment. This global assessment was completed by laboratory column experiments to mimic the variation of ionic strength and hydraulic head. The colloidal fraction collection was collected by ultrafiltration and the characterization was carried out by coupling the physico-chemical analyses (ICP-AES, SAA, SEM, ESEM, STEM, XPS) and a geochemical computer code. The results obtained in situ highlight the existence and the great variability of the colloidal fraction. Only copper was always present in the colloidal fraction from 4 to 59 % of total concentration. A methodology to reduce uncertainty was developed. A strong ionic strength decrease induced a colloidal organic matter release and lead, copper, aluminium mobilization, whereas stop and flow experiment mobilized copper iron, zinc, nickel and organic compounds. The characterization of the colloidal fraction showed that trace elements were associated with aluminium and iron oxides and with organic substances resulting from biological degradation but which are to be identified.
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https://tel.archives-ouvertes.fr/tel-00104567
Contributor : Bertrand Durin <>
Submitted on : Saturday, October 7, 2006 - 12:30:11 PM
Last modification on : Wednesday, May 22, 2019 - 2:54:02 PM
Long-term archiving on: : Friday, November 25, 2016 - 12:03:53 PM

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  • HAL Id : tel-00104567, version 1

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Bertrand Durin. Transfert et transport colloïdal de polluants métalliques
Applications en assainissement routier. Génie des procédés. Université de Nantes, 2006. Français. ⟨tel-00104567⟩

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