Titre :
|
Retention capacities of immiscible chemicals in unsaturated soils
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Auteurs :
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S. Guigard ;
W. Stiver ;
R. Zytner
|
Type de document :
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article/chapitre/communication
|
Année de publication :
|
1996
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Format :
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p. 277-289
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Langues:
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= Anglais
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Catégories :
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DECHETS
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Mots-clés:
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MILIEU NON SATURE
;
CAPACITE DE RETENTION
;
HUMIDITE DU SOL
;
COMPOSE ORGANIQUE
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Résumé :
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Retention capacities were measured in the laboratory for n-hexane and tetrachloroethylene (PCE) in three soils at varying soil water contents. Two experimental techniques were used; 1) saturation/drainage experiments where the soil columns were saturated with the chemical and allowed to drain freely for 24 h, and 2) spill simulations where a known amount of chemical was spilled on the surface of the soil column and allowed to infiltrate for one hour. Results show that the retention capacities on a volume basis were independent of chemical type. However, the retention capacities did decrease with decreasing porosity and increasing soil water content. The decrease of retention capacity with respect to soil water content was significant, with the decreases ranging from 38% to 94%.
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Source :
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Water air and soil pollution, vol.89
|