Numerical simulation of surfactant enhanced aquifer remediation processes at DNAPLs contaminated aquifer

作者：Lu Wen Xi^*; Luo Jian Nan; Xin Xin; Chen She Ming

来源：Earth Science - Journal of China University of Geosciences, 2012, 37(5): 1075-1081.

DOI：10.3799/dqkx.2012.114

• Contaminated aquifer
• Dense non-aqueous phase liquids
• Interaction mechanisms
• Mathematical descriptions
• Modeling results
• Nonaqueous phase liquids
• Pump and treat
• Removal efficiencies
• Surfactant enhanced aquifer remediation
• Three-dimensional numerical simulations

According to the migration of water, surfactant, DNAPLs (dense nonaqueous phase liquid), and their interaction mechanism, a three-dimensional numerical simulation model was build to simulate the process of surfactant enhanced aquifer remediation at DNAPLs contaminated aquifer. The model was applied to a heterogeneous PCE-contaminated aquifer for simulating both the contamination process and remediation process. The result show that the numerical simulation model provided the mathematical description of migration and fate of NAPLs (nonaqueous phase liquids) in surfactant enhanced aquifer remediation processes, and with limited time and parameters it can depict NAPLs migration law in aquifer realistically and simulate surfactant remediation processes effectively. Moreover, the modeling results show that, it's removal efficiency is 63.5% after 40 days remediation due to the solubilization and mobilization of surfactant which is 32% higher than that of pump and treat (removal efficiency is 31.8%).

• 出版日期2012