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Fe2+/HClO Reaction Produces (FeO2+)-O-IV: An Enhanced Advanced Oxidation Process

文献类型： 外文期刊

作者： Liang, Sheng 1 ; Zhu, Liuyi 1 ; Hua, Jian 2 ; Duan, Weijian 1 ; Yang, Puu-Tai 4 ; Wang, Shan-Li 4 ; Wei, Chaohai 1 ; Liu, 1 ;

作者机构： 1.South China Univ Technol, Sch Environm & Energy, Minist Educ, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Guangzhou 510006, Peoples R China

2.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510640, Peoples R China

3.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China

4.Natl Taiwan Univ, Dept Agr Chem, Taipei 10617, Taiwan

期刊名称：ENVIRONMENTAL SCIENCE & TECHNOLOGY （ 影响因子：9.028； 五年影响因子：9.922 ）

ISSN： 0013-936X

年卷期： 2020 年 54 卷 10 期

页码：

收录情况： SCI

摘要： The reaction between Fe2+ and HClO constitutes a promising advanced oxidation process (AOP) for removing pollutants from wastewater, and (OH)-O-center dot has been considered the dominant reactive oxidant despite limited evidence for this. Herein, we demonstrate that the Fe2+/HClO reaction enables the production of (FeO2+)-O-IV rather than (OH)-O-center dot in acid medium, a finding that is strongly supported by multiple lines of evidence. Both X-ray absorption near-edge structure spectroscopic tests and Mossbauer spectroscopic tests confirmed the appearance of (FeO2+)-O-IV as the reactive intermediate in the reaction between Fe2+ and HClO. The determination of (FeO2+)-O-IV generation was also derived from the methyl phenyl sulfoxide (PMSO)-based probe experiments with respect to the formation of PMSO2 without (OH)-O-center dot adducts and the density functional theory studies according to the lower energy barrier for producing (FeO2+)-O-IV compared with (OH)-O-center dot. A dual-anode electrolytic system was established for the in situ generation of Fe2+ and HClO that allows the production of (FeO2+)-O-IV. The system exhibits an enhanced capacity for oxidizing a model pollutant ( e.g., phosphite) from industrial wastewater, making it an attractive and promising AOP for the abatement of aqueous contaminants.

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