The electrodynamic coupled circulation well technology remediates pollution in low-permeability aquifers
DU Zhong-hai1,2, DONG Yan-hong3, LIU Fang-yuan1,2, DONG Shu-jun1,2, CHEN Shao-yin1,2, DONG Qian1,2, ZHOU Rui1,2
1. National and Local Joint Engineering Laboratory of Petrochemical Contaminated Site Control and Remediation Technology, Jilin University, Changchun 130061, China; 2. College of New Energy and Environment, Jilin University, Changchun 130061, China; 3. China Northeast Municipal Engineering Design and Research Institute Co. Ltd, Changchun 130021, China
Abstract：A electrodynamic coupled circulation well remediation technique was proposed, with chromate ions as the typical target contaminant. The effectiveness and removal patterns of this technique on groundwater pollution in low-permeability aquifers were investigated. Compared to conventional circulation well techniques, the electrodynamic coupled circulation well technique expanded the remediation radius by 1.25 times, eliminated the remediation blind zone (from 35.56% to 0), and increased the pollutant removal rate from 76.01% to 90.56%. Additionally, the electrodynamic power consumption was reduced by three orders of magnitude compared to electrodynamic remediation techniques, resulting in a higher pollutant removal rate, potentially doubling or tripling the efficiency. This technology coupled with the electric power method realizes the enhanced directional migration of charged ion components in low-permeability aquifers, solves the problems of low mass transfer efficiency, small repair range, and hydraulic circulation blind spots in circulation wells in low-permeability aquifers, and significantly improves the restoration effect.
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