Effet de l'agrégation sur le transport de la kaolinite recouverte d'acide humique à travers un sable de quartz d'origine naturelleAggregation effect on the transport of humic-coated kaolinite colloids through a natural quartz sand |
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| Authors: | Rachid Ait Akbour Jamaâ Douch Mohamed Hamdani Philippe Schmitz |
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| Affiliation: | 1. Département de chimie, faculté des sciences, université Ibn-Zohr, BP 28/S 80000 Agadir, Maroc;2. Unité mixte de recherche 5502, CNRS–INP/ENSEEIHT–UPS, allée du Professeur-Camille-Soula, 31400 Toulouse, France |
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| Abstract: | To evaluate the risk of contaminant transport by mobile colloids, it is necessary to understand how colloids and associated pollutants behave during their migration through uncontaminated soil or groundwater. In this study, we investigated the influence of aggregation induced by Ca2+ and trace metals (Pb2+, Cu2+) concentrations on the transport of humic-coated kaolinite colloids through a natural quartz sand at pH=4. Adsorbed divalent cations reduce the colloids surface charge and thereby induce aggregation and deposition in porous media. To cite this article: R. Ait Akbour et al., C. R. Geoscience 334 (2002) 981–985. |
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| Keywords: | kaolinite humic acid divalent cations aggregation kaolinite acide humique cations divalents agrégation Géosciences de surface Pédologie Surface Geosciences Pedology |
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