Efficient degradation of ciprofloxacin in wastewater by CuFe2O4/CuS photocatalyst activated peroxynomosulfate

被引：58

作者：

Jia, Xinyu ^{[1
,2
,3
]}

Zhang, Jinhui ^{[1
]}

Huang, Qinglin ^{[2
]}

Xiong, Chunyu ^{[2
]}

Ji, Haixia ^{[2
]}

Ren, Qifang ^{[3
]}

Jin, Zhen ^{[2
]}

Chen, Shaohua ^{[1
,2
,3
]}

Guo, Wanmi ^{[3
]}

Chen, Jing ^{[3
]}

Ge, Yao ^{[3
]}

Ding, Yi ^{[1
,2
,3
,4
]}

机构：

[1] Anhui Jianzhu Univ, Anhui Adv Bldg Mat Engn Lab, Hefei 230601, Anhui, Peoples R China

[2] Anhui Jianzhu Univ, Anhui Prov Key Lab Environm Pollut Control & Resou, Hefei, Peoples R China

[3] Anhui Jianzhu Univ, Key Lab Huizhou Architecture Anhui Prov, Hefei 230022, Anhui, Peoples R China

[4] State Key Lab Sil Sand Resources Utilizat, Hefei 230022, Anhui, Peoples R China

来源：

ENVIRONMENTAL RESEARCH | 2024年 / 241卷

关键词：

Peroxymonosulfate; Ciprofloxacin; DFT calculation; Degradation pathway; SURFACE; MECHANISM;

D O I：

10.1016/j.envres.2023.117639

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, CuFe2O4/CuS composite photocatalysts were successfully synthesized for the activation of peroxynomosulfate to remove ciprofloxacin from wastewater. The structural composition and morphology of the materials were analyzed by XRD, SEM, TEM, and Raman spectroscopy. The electrochemical properties of the samples were tested by an electrochemical workstation. The band gap of the samples was calculated by DFT and compared with the experimental values. The effects of different catalysts, oxidant PMS concentrations, and coexisting ions on the experiments were investigated. The reusability and stability of the photocatalysts were also investigated. The mechanism of the photocatalytic degradation process was proposed based on the free radical trapping experiment. The results show that the p-p heterojunction formed between the two contact surfaces of the CuFe2O4 nanoparticle and CuS promoted the charge transfer between the interfaces and inhibited the recombination of electrons and holes. CuFe2O4-5/CuS photocatalyst has the best catalytic activity, and the removal rate of ciprofloxacin is 93.7%. The intermediates in the degradation process were tested by liquid chromatography-mass spectrometry (LC-MS), and the molecular structure characteristics of ciprofloxacin were analyzed by combining with DFT calculations. The possible degradation pathways of pollutants were proposed. This study reveals the great potential of the photocatalyst CuFe2O4/CuS in the activation of PMS for the degradation of ciprofloxacin wastewater.

引用

页数：16

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