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Highly efficient adsorption and catalytic degradation of ciprofloxacin by a novel heterogeneous Fenton catalyst of hexapod-like pyrite nanosheets mineral clusters
Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2021-09-20 , DOI: 10.1016/j.apcatb.2021.120734
Xin Nie 1 , Guiying Li 2 , Shanshan Li 3 , Yingmei Luo 3 , Wenming Luo 3 , Quan Wan 1, 4 , Taicheng An 2
Affiliation  

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. 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 Cl ions (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.



中文翻译:

六足类黄铁矿纳米片矿物簇的新型多相芬顿催化剂高效吸附和催化降解环丙沙星

在此,通过简便的水热法制备了一种新型六足类黄铁矿纳米片矿物簇。与经典的均相 Fenton 过程相比,该催化剂对环丙沙星(20 mg/L)具有更高的吸附能力和催化活性,在 pH 4.0 下可在 10 分钟内完全降解。 OH 是导致环丙沙星降解的主要活性氧。Br - (≥ 1 mM)、I - (≥ 1 mM)和高浓度F -离子(≥ 10 mM)对环丙沙星降解有抑制作用,但Cl -离子 (0–100 mM) 对环丙沙星的去除没有显示出明显的影响。定性鉴定了13个中间体,初步提出了环丙沙星的降解机制。产生了几种有毒的中间体,但在反应 30 分钟后,它们可以被这种非均相芬顿催化剂完全矿化和解毒。该工作提供了一种新型的非均相芬顿催化剂来净化和解毒抗生素以及其他难处理的有机污染物污染的废水。

更新日期:2021-09-27
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