Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/9135
Title: Remediation of contaminated soil by a solvent/surfactant system
Authors: Chu, W 
Kwan, CY
Keywords: PCB
Remediation
Soil-washing
Solvent
Surfactant
Issue Date: 2003
Publisher: Pergamon Press
Source: Chemosphere, 2003, v. 53, no. 1, p. 9-15 How to cite?
Journal: Chemosphere 
Abstract: This study investigates a new approach using a solvent/surfactant-aided soil-washing process to improve the performance of conventional surfactant-aided soil remediation. Three surfactants (Brij 35, Tween 80, and SDS) and three organic solvents (acetone, triethylamine, and squalane) were used to evaluate the desorption performances of 4,4′-dichlorobiphenyl (DCB) out of three soils with different sorption characteristics. The performance improvement is likely due to better dissolution of the hydrophobic contaminants from the soil assisted by the solvent, and the formation of solvent-incorporated surfactant micelles, which increases both the size (i.e. capacity) and affinity of micelles for more effective contaminant extraction. The foc of soils were found to be important in determining the performance of a solvent/surfactant-aided soil-washing process. Judging from the experimental data and as verified by the two constants in the proposed soil-washing model, as the organic solvent is coexisting with the surfactant micelles, both the marginal soil-washing performance (right after the use of a very small amount of solvent compared to that of none) and the final soil-washing capacity are increased compared to those of a pure surfactant-aided washing process.
URI: http://hdl.handle.net/10397/9135
ISSN: 0045-6535
EISSN: 1879-1298
DOI: 10.1016/S0045-6535(03)00389-8
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