Theory and Experiments on Subsurface Contaminant Sorption Systems
| Autor: | Thomas B. Stauffer, Kirk Hatfield, Joe Ziegler, David R. Burris |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
geography
Environmental Engineering geography.geographical_feature_category Environmental engineering Aquifer Sorption Contamination Permeability (earth sciences) Groundwater pollution Environmental chemistry Environmental Chemistry Environmental science Porous medium Water pollution Groundwater General Environmental Science Civil and Structural Engineering |
| Zdroj: | Journal of Environmental Engineering. 118:322-337 |
| ISSN: | 1943-7870 0733-9372 |
| DOI: | 10.1061/(asce)0733-9372(1992)118:3(322) |
| Popis: | Subsurface sorption systems (SSS) are zones created within aquifers to enhance the contaminant sorptive capabilities of the porous media. These systems could reduce contaminant mobility by as much as three orders of magnitude, thus delaying contaminant arrival and reducing maximum concentrations downgradient. Reduced contaminant mobility may also allow time for microbial and abiotic degradation reactions to occur. A few investigators explored the use of cationic surfactants in sorption zones. There are limitations to the use of these surfactants, namely reliance upon cation exchange sites, limited contaminant sorption ability, and their biocidal activity. The possible use of nontoxic, water‐insoluble, nonaqueous phase liquids (NAPL) to form SSSs is examined. Experimental results are presented for a bench‐scale system constructed with sand that is partially saturated with a sorbing NAPL (SNAPL). Residual SNAPL saturations, aqueous phase relative permeabilities, and capture efficiency for a hydrophobic orga... |
| Databáze: | OpenAIRE |
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