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Numerical Study on Operating Factors Affecting Performance of Surfactant-Enhanced Aquifer Remediation Process  

Lee, Kun-Sang (Department of Environmental and Energy Systems Engineering, Kyonggi University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.32, no.7, 2010 , pp. 690-698 More about this Journal
Abstract
Contamination of groundwater resources by organic chemicals has become an issue of increasing environmental concern. Surfactant-enhanced aquifer remediation (SEAR) is widely recognized as one of the most promising techniques to remediate organic contaminations in-situ. Solutions of surfactant or surfactant with polymer are used to dramatically expedite the process, which in turn, may reduce the treatment time of a site compared to use of water alone. In the design of surfactant-based technologies for remediation of organic contaminated aquifers, it is very important to have a considerable analysis using extensive numerical simulations prior to full-scale implementation. This study investigated the formation and flow of microemulsions during SEAR of organic-contaminated aquifer using the finite difference model UTCHEM, a three-dimensional, multicomponent, multiphase, compositional model. The remediation process variables considered in this study were the sequence of injection fluids, the injection and extraction rate, the concentrations of polymer in surfactant slug and chase water, and the duration of surfactant injection. For each variable, temporal changes in injection and production wells and spatial distributions of relative saturations in the organic phase were compared. Cleanup time and cumulative organic recovery were also quantified. The study would provide useful information to design strategies for the remediation of nonaqueous phase liquid-contaminated aquifers.
Keywords
Surfactant-enhanced Remediation; Nonaqueous Phase Liquids; Aquifer; Polymer; UTCHEM;
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Times Cited By KSCI : 1  (Citation Analysis)
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