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Hydraulic Conductivity of Soil Sorptive Zones Created by In Situ Injection of a Cationic Surfactant |
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| Authors: | W. James Gellner II Xianda Zhao Matthew Girand Stephen A. Boyd Thomas C. Voice |
| Affiliation: | 1Hazen and Sawyer, Cincinatti, OH 45242. E-mail: jgellner@hazenandsawyer.com 2CTI and Associates, Brighton, MI 48116. E-mail: xzhao@cti-assoc.com 3DaimlerChrysler Corporation, Auburn Hills, MI 48236. E-mail: mg125@dcx.com 4Dept. of Crop and Soil Sciences, Michigan State Univ., East Lansing, MI 48824. E-mail: boyds@msu.edu 5Dept. of Civil and Environmental Engineering, Michigan State Univ., East Lansing, MI 48824 (corresponding author). E-mail: voice@msu.edu |
| Abstract: | The sorptive capabilities of soils for organic contaminants can be greatly enhanced by treatment with cationic surfactants, and this has been suggested as a potential in situ approach for contaminant plume management. The hydraulic properties of soils modified by injection of hexadecyltrimethylammonium (HDTMA) were investigated using soil columns and a fixed-ring consolidometer. Oshtemo soil (87% sand, 10.5% clay, 2.5% silt) under two different effective stresses, was equilibrated with 1?mM NaCl and treated by recirculation of two different HDTMA soil concentrations, one above and one below the cation exchange capacity. No statistically significant changes in hydraulic conductivity occurred as a result of HDTMA treatment at any of the experimental conditions studied. These results suggest that sorptive zones created in situ with HDTMA may be hydraulically feasible. |
| Keywords: | Sorption Hazardous wastes Soil permeability Clays Soils Ground water Subsurface environment Hydraulic conductivity |