Highly efficient adsorption and catalytic degradation of ciprofloxacin by a novel heterogeneous Fenton catalyst of hexapod-like pyrite nanosheets mineral clusters

Li, Guiying ¹Li, Shanshan ²Luo, Yingmei ²Luo, Wenming ²Wan, Quan ³Nie, Xin ³An, Taicheng¹

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作者信息

1. Guangdong Univ Technol, Sch Environm Sci & Engn, Inst Environm Hlth & Pollut Control,Guangzhou Key, Guangdong Key Lab Environm Catalysis & Hlth Risk, Guangzhou 510006, Peoples R China
2. Guizhou Normal Univ, Sch Chem & Mat Sci, Guiyang 550001, Peoples R China
3. Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China
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Abstract

Herein, a novel hexapod-like pyrite nanosheets mineral cluster was prepared via a facile hydrothermal method. Compared with classical homogeneous Fenton processes, this catalyst possessed a higher adsorption capacity and catalytic activity to ciprofloxacin (20 mg/L), which could be completely degraded within 10 min at pH 4.0. center dot OH was the main reactive oxygen species responsible for ciprofloxacin degradation. Br- (> 1 mM), I- (> 1 mM), and high concentration of F- ions (> 10 mM) exhibited an inhibition effect on ciprofloxacin degradation, but the Clions (0-100 mM) did not show obvious effects on ciprofloxacin removal. Thirteen intermediates were qualitatively identified, and degradation mechanism was tentatively proposed for ciprofloxacin. Several toxic intermediates were produced, but they could be fully mineralized and detoxified by this heterogeneous Fenton catalyst after 30 min reaction. The work provides a novel heterogeneous Fenton catalyst to purify and detoxify antibiotics as well as other refractory organic pollutants contaminated wastewater.

Key words

Pyrite mineral/Hexapod-like nanosheets clusters/Heterogeneous Fenton catalyst/Ciprofloxacin degradation kinetics/Degradation mechanism

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量100

参考文献量68

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