Abstract
2,4-Dichlorophenol (2,4-DCP) is difficult to degrade rapidly in the environment due to its stable chemical properties, so it was easy to lead to serious chlorophenol pollution in soil. Consequently, a remediation method which is efficient, safe, and economical is required. In this study, electrokinetic (EK) remediation was used to transfer sodium persulfate (Na2S2O8) into soil to degrade 2,4-DCP, and the effect of several factors (including the addition location of Na2S2O8, applied voltage, and running time) on the remediation efficiency was explored. The concentration of Na2S2O8, residual efficiency of 2,4-DCP and distribution characteristics of pH, and electrical conductivity were analyzed. The results showed that the cathode was the optimal position to add Na2S2O8. Under this condition, Na2S2O8 was uniformly distributed in the whole soil column through electromigration. The optimal removal efficiency of 2,4-DCP in soil by adding Na2S2O8 was approximately 26% when the voltage gradient was 1.0 V/cm and the operating time was 9 days, which was mainly due to the degradation of S2O82−.
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This work was supported by the National Natural Science Foundation of China (No. 22278263).
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All authors contributed to the study’s design. Yunfeng Xu provided conceptualization and funding acquisition. Material preparation, data collection, and analysis were performed by Qinqin Lu and Jianfang Fu. Xiaoxun Huang contributed to the draft of the manuscript and analysis. Yangwei Qu and Xueping Chen commented on the manuscript. Weiguo Gao contributed to writing review and editing of the manuscript. All authors read and approved the final manuscript.
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Xu, Y., Huang, X., Qu, Y. et al. Remediation of 2,4-dichlorophenol-contaminated soil by electrokinetic delivery of persulfate technology. Environ Sci Pollut Res 31, 3926–3937 (2024). https://doi.org/10.1007/s11356-023-30450-7
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DOI: https://doi.org/10.1007/s11356-023-30450-7