标题: Removal of diesel from soil washing effluent by electro-enhanced Fe2+ activated persulfate process

作者: Liu, FZ (Liu, Fuzhen); Zhao, JJ (Zhao, Jinjin); Ma, YY (Ma, Yanyan); Liu, ZZ (Liu, Zhengzhi); Xu, Y (Xu, Yin); Zhang, H (Zhang, Hui)

来源出版物: JOURNAL OF ELECTROANALYTICAL CHEMISTRY 卷: 906 文献号: 115995 DOI: 10.1016/j.jelechem.2021.115995 出版年: FEB 1 2022

摘要: Electrochemical process coupling with Fe2+/persulfate (Fe2+/PDS) oxidation was applied to treat soil washing effluent containing diesel and surfactant Tween 80. The influence of several important parameters including anode material, initial pH, current density, Fe2+ dosage and PDS dosage on the abatement of diesel by electro/Fe2+/PDS process was investigated. The results show that the platinum anode (Ti/Pt) could achieve higher removal of diesel in comparison with the tantalum or ruthenium-based (Ti/IrO2-Ta2O5 and Ti/IrO2-RuO2) anode, and lower initial pH favors diesel decay. There exist the optimal values of electricity intensity, Fe2+ and PDS dosages for diesel elimination. Under the conditions of pH0 3.0, 1.0 mM Fe2+, 10 mM PDS and 27.8 mA/cm(2) current density, 88.6 % of diesel removal efficiency was obtained while almost 70.0 % of Tween 80 could be recovered. The excitation emission matrix (EEM) fluorescence spectroscopy further verified the degradation of diesel in the electro/Fe2+/PDS process. Soil respiration tests were carried out to evaluate the toxicity of the soil washing effluent before and after electro/Fe2+/PDS process. The reactive radicals formed were identified by electron paramagnetic resonance (EPR) technique. Briefly, coupling electrolysis with Fe2+/PDS oxidation is demonstrated to be an effective method for the abatement of diesel from soil washing effluent with the recovery of surfactant Tween 80.

作者关键词: Soil washing; Electrochemical oxidation; Persulfate; Tween 80; Diesel

地址: [Liu, Fuzhen; Zhao, Jinjin; Ma, Yanyan; Liu, Zhengzhi; Xu, Yin; Zhang, Hui] Wuhan Univ, Sch Resource & Environm Sci, Dept Environm Sci & Engn, Wuhan 430079, Peoples R China.

[Liu, Fuzhen; Xu, Yin] Hubei Univ, Fac Resources & Environm Sci, Hubei Key Lab Reg Dev & Environm Response, Wuhan 430062, Peoples R China.

通讯作者地址: Xu, Y; Zhang, H (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Dept Environm Sci & Engn, Wuhan 430079, Peoples R China.

电子邮件地址: yxu1101@163.com; eeng@whu.edu.cn

影响因子：4.598