Pilot Study on In-situ Electrokinetic Remediation of Chloride Ion Contaminated Soil and Groundwater
A pilot study of in-situ electrokinetic remediation technology was conducted for a site contaminated with high concentrations of chloride ions.The pilot study lasted for 49 days,with a voltage gradient 1 V/cm,and the pH values for cathode and anode electrolytes of 10 and 3 respectively.The total power consumption was 9385 kW·h,which equivalent to a unit energy consumption of 48.5 kW·h/m3.The average removal rate of chloride in groundwater was 42.5%,whereas the removal rates of chloride ions in soil of 1.5 m and 2.5 m depth were 45.4%and 23.4%,respectively.The results showed the removal rate in the upper layer soil was higher than that in the lower layer.The pilot study illustrated that in-situ electrokinetic remediation technology can achieve simultaneous remediation of soil and groundwater without introducing new chemicals to cause secondary pollution.It is an efficient,low-consumption,environmentally friendly technology with a potential of broad application prospects.
In-situ electrokinetic remediationChloride ion pollutionSoil and groundwater remediation
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