Humic acid activated persulfate combined with electrokinetic delivery for remediation of 2, 4-dichlorophenol contaminated soil

Yunfeng Xu; Yufang Jiang; Xiaoxun Huang; Qinqin Lu; Guoqing Shen; Xueping Chen

doi:10.1016/j.scitotenv.2024.177585

Humic acid activated persulfate combined with electrokinetic delivery for remediation of 2, 4-dichlorophenol contaminated soil

Sci Total Environ. 2024 Nov 18:177585. doi: 10.1016/j.scitotenv.2024.177585. Online ahead of print.

Authors

Yunfeng Xu¹, Yufang Jiang¹, Xiaoxun Huang¹, Qinqin Lu¹, Guoqing Shen², Xueping Chen³

Affiliations

¹ College of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
² College of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.
³ College of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China. Electronic address: xpchen@shu.edu.cn.

PMID: 39566640
DOI: 10.1016/j.scitotenv.2024.177585

Abstract

2,4-dichlorophenol (2,4-DCP) is a high-toxicity phenol compound, which is difficult to remove, poses a threat to human health, and seriously damages the soil ecosystems. In this study, an emerging technology, Electrokinetic (EK) remediation, was used to enhance the mobility of persulfate for remediation of soils contaminated with 2,4-dichloropropanol. In order to improve the overall removal efficiency of 2,4-DCP, Na₂S₂O₈ activated by humic acid (HA) on the remediate effect was investigated. The results showed that the dosage of commercial HA did not affect the physical and chemical properties of the soil, and the optimal dosage was 1.5 g/600 g (HA/soil), in which case the removal efficiency of 2,4-DCP was 73.7 %. When the dosage of compost-derived HA was 1.5 g/600 g (HA/soil), the removal efficiency of 2,4-DCP was 68.66 %. From an economic point of view, compost-derived HA could be used as a good substitute for commercial HA.

Keywords: 2,4-Dichlorophenol; Electrokinetic; Humic acid; Persulfate; Soil remediation.