Enhanced oxidation of 2,4-dichlorophenol in ferrate(VI) and copper oxide system via the formation of trivalent copper ion and singlet oxygen

Guihai Zhang; Yidan Luo; Jiancheng Cheng; Xinlong Hua; Guizhou Xu; Mengqin Yu; Zhu Wang; Yalan Zhang; Wei Liu; Yingxin Du; Xianchuan Xie; Daishe Wu; Zugen Liu

doi:10.1016/j.chemosphere.2024.143970

Enhanced oxidation of 2,4-dichlorophenol in ferrate(VI) and copper oxide system via the formation of trivalent copper ion and singlet oxygen

Chemosphere. 2024 Dec 15:143970. doi: 10.1016/j.chemosphere.2024.143970. Online ahead of print.

Authors

Guihai Zhang¹, Yidan Luo², Jiancheng Cheng¹, Xinlong Hua¹, Guizhou Xu³, Mengqin Yu¹, Zhu Wang¹, Yalan Zhang¹, Wei Liu¹, Yingxin Du¹, Xianchuan Xie⁴, Daishe Wu⁵, Zugen Liu⁶

Affiliations

¹ Key Laboratory of Poyang Lake Environment and Resource Utilization, Engineering Research Center of Watershed Carbon Neutralization, Ministry of Education, School of Resource and Environment, Nanchang University, Nanchang 330031, China.
² Key Laboratory of Poyang Lake Environment and Resource Utilization, Engineering Research Center of Watershed Carbon Neutralization, Ministry of Education, School of Resource and Environment, Nanchang University, Nanchang 330031, China; School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang, 330063, China; Jiangxi Key Laboratory of Environmental Pollution Control, Jiangxi Academy of Eco-Environmental Sciences and Planning, Nanchang, 330039, China.
³ State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, P. R. China.
⁴ Key Laboratory of Poyang Lake Environment and Resource Utilization, Engineering Research Center of Watershed Carbon Neutralization, Ministry of Education, School of Resource and Environment, Nanchang University, Nanchang 330031, China; Jiangxi Nanxin Environmental Protection Technology Co. LTD, Jiujiang City Jiangxi Province, 330300, China. Electronic address: xchxie@ncu.edu.cn.
⁵ Key Laboratory of Poyang Lake Environment and Resource Utilization, Engineering Research Center of Watershed Carbon Neutralization, Ministry of Education, School of Resource and Environment, Nanchang University, Nanchang 330031, China; School of Materials and Chemical Engineering, Pingxiang University, Pingxiang 337000,China. Electronic address: dswu@ncu.edu.cn.
⁶ Jiangxi Key Laboratory of Environmental Pollution Control, Jiangxi Academy of Eco-Environmental Sciences and Planning, Nanchang, 330039, China. Electronic address: 445341812@qq.com.

PMID: 39689757
DOI: 10.1016/j.chemosphere.2024.143970

Abstract

Improving the activity of ferrate is one of the main research focus in environmental field. Here, we demonstrate a novel copper oxide (CuO)-Ferrate(VI) system wherein CuO plays a key role in activating Fe(VI) to effectively eliminate phenolic contaminants. The dominant reactive species were determined to be Cu(III) and ¹O₂, confirmed by in situ Raman spectroscopy, quenching experiments, and EPR tests. The results indicated that Fe(VI) preferentially reacts with CuO, forming Cu(III) and ¹O₂. Subsequently, deprotonated 2,4-dichlorophenol (2,4-DCP) was adsorbed with Cu(III) via electrostatic adsorption and was directly oxidized by Cu(III). Co-existing ion experiments demonstrated the strong stability of the CuO/Fe(VI) system against environmental background substances, maintaining effective removal efficiency over multiple cycles. In summary, this study highlights the potential advantages of CuO-assisted Fe(VI) activation, offering a new route for the efficient utilization of Fe(VI) in eliminating phenolic pollutants.

Keywords: 2; 4-dichlorophenol; cupric oxide; ferrate(VI); non-radical oxidation.