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PILOT-SCALE ELECTRO-KINETIC REMEDIATION OF LEAD POLLUTED FIELD SEDIMENTS: MODEL DESIGNATION, NUMERICAL SIMULATION, AND FEASIBILITY EVALUATION
Mao, X., X. Shao, and Z. Zhang.
Environmental Sciences Europe 31:25(2019)

Model simulation and feasibility analysis were used to optimize the pilot-scale remediation and recycling of Pb-polluted sediments using electro-kinetic remediation (EKR). A 2D reactive-transport model was designed and implemented to fully describe the transport mechanisms and geochemical reactions of Pb in sediments, focusing on the assumptions of model parameters for better construction of the real contaminated sediment environment. The timing and duration of electrode polarity inversion (EPI) were optimized based on the simulation results of pH profiles, Pb mobilizations and distributions, and Pb removal efficiencies. The accuracies of the predicted results were then validated through a comparison with the experimental data of the pilot-scale EKR tests. Subsequently, a parametric study was performed to analyze the energy consumption of EKR with optimal operating parameters. A feasibility analysis determined that the method has low energy consumption and is a cost-effective remediation technique. https://link.springer.com/content/pdf/10.1186%2Fs12302-019-0209-x.pdf



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