Econ. Environ. Geol. 2002; 35(2): 149-154
Published online April 30, 2002
© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY
Effect of Surfactant Concentration and pH on Surfactant-Enhanced Remediation in Iowa Soil Contaminated by TCB
Correspondence to : Dal-Heui Lee
Abstract
Column tests were carried out to examine the effect of surfactant solution conditions on surfactant-enhanced remediation of contaminated soil. The selected conditions of the surfactant solution were concentration and pH. 1,2,4-trichlorobenzene (TCB) was chosen as the model hydrophobic organic substances. Sodium diphenyl oxide disulfonate (DOSL) and octylphenoxypoly ethoxyethanol (OPEE) surfactants were selected for this study. Two Iowa soils, Fruitfield sand and Webster clay loam, were leached with surfactant solution. The test results revealed that an optimum condition was achieved for 4 %(v/v) of concentration and 10 of pH, respectively. The maximum recoveries of added TCB (93-98%) were obtained when optimal conditions of each surfactant solution parameter were simultaneously met. The optimum conditions of these parameters may be useful for surfactant-assisted remediation in soil contaminated by TCB.
Keywords surfactant, TCB, Remediation, Optimum conditions, Soil
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Econ. Environ. Geol. 2002; 35(2): 149-154
Published online April 30, 2002
Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.
Effect of Surfactant Concentration and pH on Surfactant-Enhanced Remediation in Iowa Soil Contaminated by TCB
Dal-Heui Lee1* and Robert D. Cody2
1Korea Biosystems, KIST Venture Town 945B, Hawolgok-dong, Sungbuk-gu, Seoul 136-791, Korea
2Department of Geological and Atmospheric Sciences, 253 Science I, Iowa State University, Ames, IA, USA 50011
Correspondence to:
Dal-Heui Lee
Abstract
Column tests were carried out to examine the effect of surfactant solution conditions on surfactant-enhanced remediation of contaminated soil. The selected conditions of the surfactant solution were concentration and pH. 1,2,4-trichlorobenzene (TCB) was chosen as the model hydrophobic organic substances. Sodium diphenyl oxide disulfonate (DOSL) and octylphenoxypoly ethoxyethanol (OPEE) surfactants were selected for this study. Two Iowa soils, Fruitfield sand and Webster clay loam, were leached with surfactant solution. The test results revealed that an optimum condition was achieved for 4 %(v/v) of concentration and 10 of pH, respectively. The maximum recoveries of added TCB (93-98%) were obtained when optimal conditions of each surfactant solution parameter were simultaneously met. The optimum conditions of these parameters may be useful for surfactant-assisted remediation in soil contaminated by TCB.
Keywords surfactant, TCB, Remediation, Optimum conditions, Soil
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