Organochlorine pesticides contaminated soil decontamination using TritonX-100-enhanced advanced oxidation under electrokinetic remediation

Fidèle Suanon; Liu Tang; Hongjie Sheng; Yuhao Fu; Leilei Xiang; Ziquan Wang; Xiangwen Shao; Daouda Mama; Xin Jiang; Fang Wang

doi:10.1016/j.jhazmat.2020.122388

Organochlorine pesticides contaminated soil decontamination using TritonX-100-enhanced advanced oxidation under electrokinetic remediation

J Hazard Mater. 2020 Jul 5:393:122388. doi: 10.1016/j.jhazmat.2020.122388. Epub 2020 Feb 24.

Authors

Fidèle Suanon¹, Liu Tang², Hongjie Sheng³, Yuhao Fu³, Leilei Xiang³, Ziquan Wang⁴, Xiangwen Shao⁵, Daouda Mama⁶, Xin Jiang³, Fang Wang⁷

Affiliations

¹ Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; National Institute of Water, University of Abomey-Calavi, 01 BP: 526, Cotonou, Benin.
² Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; College of Civil Engineering, Fuzhou University, Fujian, 350116, China.
³ Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
⁴ Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China.
⁵ College of Civil Engineering, Fuzhou University, Fujian, 350116, China.
⁶ National Institute of Water, University of Abomey-Calavi, 01 BP: 526, Cotonou, Benin.
⁷ Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China. Electronic address: wangfang@issas.ac.cn.

PMID: 32120218
DOI: 10.1016/j.jhazmat.2020.122388

Abstract

Remediation of organochlorine pesticides (OCPs)-contaminated soils is urgently required especially in China. Surfactants have emerged as reliable and efficient co-solvent for the treatment of hardly soluble organic pollutants in contaminated soil. Here, we report the use of TritonX-100 (TX-100) in advanced oxidation under electrokinetic technology (EK) for OCPs removal from a historically contaminated soil from a former pharmaceutical industrial wasteland. Result shows that TX-100 (10%) played a key role in soil remediation. In effect, after a treatment period of 15 days, pollutants washed ranged from 50.68% (4,4'-DDT) to 76.07% (HCB), when TX-100 was used as the electrolyte (EK-TX-100). A simple advanced oxidation of the soil using sodium persulfate (PS) under EK approach (EK-PS) was limited to achieve good removal efficiency of the pollutants; as the result of OCPs' hardly dissolvable nature. The achieved removal efficiency were comprised between 22.62% (2,4-DDT) and 55.78% (1,2,4,5-TCB). With the application of TX-100 as co-solvent (EK-TX-100/PS), the pollutants removal efficiency significantly improved (p < 0.05). The treatment efficiency was shifted and up to 88.05% (1,2,4-TCB) was achieved, while the lowest removal efficiency was 56.36% (4,4'-DDE). We come to the conclusion that the use of TX-100-enhanced advanced oxidation (EK-TX-100/PS) as a reliable treatment for remediating organochlorine contaminated soil.

Keywords: Advanced oxidation; Aged contaminated soil; Electrokinetic remediation; Organochlorine pesticide residues; TritonX-100.

Publication types

Research Support, Non-U.S. Gov't