Etude de la diffusion et l-adsorption des contaminants dans les sols Algériens

AbdelIllah Bezzar, Fouad Ghomari

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Geoenvironmental Engineering

ABSTRACT: This is a hydraulic and geochemical study on 2 materials: natural clay (AN) and a regenerated material made up of a sand-bentonite (SB) mixture. The hydraulic part allowed us to conclude that a 10% industrial bentonite content mixed with sand offers hydraulic properties that are similar to those of AN material and are lower than the required standards. The geochemical properties of both AN and SB matrixes are comparable with those of some of the synthetic leachates studied. Furthermore, the Langmuir model helped us to identify the adsorption capacities of both matrixes with the following selectivities: Pb > Cu > Cd > Zn. We develop in second technical aspects associated with electrical conductivity measurements within landfill liners. The conductivity measurements were used to quantify the pore fluid concentration and effective diffusion coefficient of (SB) liners. The material (SB) can used as landfill liners because he have a permebilty less than recommended and high adsorption capacity

RÉSUMÉ: la teneur de 10% de bentonite industrielle mélangé au sable, offre des propriétés hydrauliques comparables au matériau AN et sont inférieures aux normes requises. Les propriétés géochimiques des deux matrices (AN) et (SB) sont comparables vis-à-vis de quelques lix : Pb>Cu>Cd>Zn. Nous développons, dans la dernière partie, une méthode non destructive permettant la mesure de la diffusion dans ces matériaux. La conductivité électrique est utilisé pour quantifier la concentration dans les pores et le coefficient de diffusion de la barrière (SB). ffre une faible perméabilité une Mots clef : Diffusion, Adsorption, Langmuir, Méthode non destructifs,

Please include this code when submitting a data update: GEO2011_787

Access this article:
Canadian Geotechnical Society members can access to this article, along with all other Canadian Geotechnical Conference proceedings, in the Member Area. Conference proceedings are also available in many libraries.

Cite this article: