In Situ Oxidation Effect and Corrosion Risk Analysis of Groundwater Chlorinated Hydrocarbons
The development and application of chlorinated hydrocarbon contaminated groundwater remediation technology has been a hot topic in the academic field.The optimum parameters for re-pairing chlorinated hydrocarbons by activating Na2S2O8 with Fe2+and NaOH were obtained through a pilot experiment.The high pressure rotary jet technology was applied to an engineering example.After the restoration,the groundwater restoration effect and potential corrosion risk were evaluated.The results showed that the removal rate of vinyl chloride by NaOH activation of Na2S2O8 was higher than that by Fe2+activation,when the persulfate dosage was 2%,the repair re-quirement could be met.After the restoration,the concentrations of vinyl chloride,1,1,2-trichloro-ethane and 1,2-dichloroethane in groundwater were all lower than the restoration target values,and showed a gradually decreasing trend with the extension of time,which met the restoration require-ments.The analysis of groundwater corrosion risk from pH,ORP,residual sulfate and chloride con-centration showed that the corrosion risk is low.
in-situ chemical oxidationchlorinated hydrocarbonsgroundwater remediationeffect evaluationcorrosion risk
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