标题: Degradation of 2,4-DCP using persulfate and iron/E-carbon micro-electrolysis coupling system

作者: Ma, YS (Ma, Yongsong); Gu, YX (Gu, Yuxing); Jiang, D (Jiang, Da); Mao, XH (Mao, Xuhui); Wang, DH (Wang, Dihua)

来源出版物: JOURNAL OF HAZARDOUS MATERIALS 卷: 413 文献号: 125381 DOI: 10.1016/j.jhazmat.2021.125381 出版年: JUL 5 2021

摘要: The greenhouse gas carbon dioxide (CO2) was converted to a novel CO2 conversion material (electrolytic carbon, EC) by molten salt electrochemical conversion, which served as the carbon source to prepare an iron-carbon composite (Fe-EC). The composite was used to activate persulfate (PS) and degrade 2,4-dichlorophenol (2,4-DCP) in an aqueous solution. The effects of several essential operating parameters such as PS dosage and pH on 2,4-DCP degradation were investigated. The removal efficiency of 2,4-DCP (20 mg L-1) was 97.8% in the presence of Fe-EC (50 mg L-1) and PS (1 mmol L-1). Moreover, the average % reaction stoichiometric efficiency (RSE) (calculated for all selected times 5-60 min) was maintained at 23.07%. Electron paramagnetic resonance (EPR), classical radical scavenging experiments, and density functional theory (DFT) calculations were integrated for a mechanistic study, which disclosed that the active species in the system were identified as SO4 center dot-, center dot OH, and O-2(center dot-). Moreover, the iron-carbon micro-electrolysis/PS (ICE-PS) system had a high tolerance to a wide range of pH, which would provide theoretical guidance for the treatment of organic pollutants in practical industrial wastewater.

入藏号: WOS:000647587900006

语言: English

文献类型: Article

作者关键词: CO2 conversion carbon; Persulfate; 2,4-DCP; Enhanced corrosion; DFT calculations

地址: [Ma, Yongsong; Gu, Yuxing; Jiang, Da; Mao, Xuhui; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

通讯作者地址: Wang, DH (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

电子邮件地址: wangdh@whu.edu.cn

影响因子：9.038