文献详情
An efficient CuO-gamma Fe2O3 composite activates persulfate for organic pollutants removal: Performance, advantages and mechanism
文献类型：期刊
通讯作者：Zhang, GM (reprint author), Renmin Univ China, Sch Environm & Nat Resource, Beijing 100872, Peoples R China.; Zhou, NY (reprint author), Army Logist Univ PLA, Dept Mil Installat, Chongqing 401311, Peoples R China.
期刊名称：CHEMOSPHERE影响因子和分区
年：2020
卷：242
ISSN：0045-6535
关键词：CuO-gamma Fe2O3; Persulfate; Organic pollutants; Removal; Mechanism
摘要：CuO-gamma Fe2O3 was fabricated as a novel and effective persulfate (PS) catalyst to remove bio-refractory organic pollutants. Characterization results showed that CuO-gamma Fe2O3 possessed a relatively large surface area among transition metal oxides which provided favorable adsorption and activation sites for PS to degrade pollutants. There was an obvious synergy between CuO and gamma Fe2O3 in the composite, which played 84.7% role in Acid orange 7 (AO7) removal. Under the optimal conditions (C ...More
CuO-gamma Fe2O3 was fabricated as a novel and effective persulfate (PS) catalyst to remove bio-refractory organic pollutants. Characterization results showed that CuO-gamma Fe2O3 possessed a relatively large surface area among transition metal oxides which provided favorable adsorption and activation sites for PS to degrade pollutants. There was an obvious synergy between CuO and gamma Fe2O3 in the composite, which played 84.7% role in Acid orange 7 (AO7) removal. Under the optimal conditions (CuO-gamma Fe2O3 dosage = 0.6 g L-1, PS dosage = 0.8 g L-1, unadjusted solution pH), almost complete AO7 was rapidly eliminated in 5 min. Moreover, the wide workable pH range (2-13), good stability (0.82 mg L-1 Cu leached, almost no Fe leached) and reusability (4 times) were the significant virtues of CuO-gamma Fe2O3 for wastewater treatment. Besides, the reaction mechanism mainly based on the interaction among Cu(II/III) and Fe(II/III) species for sulfate radical (SO4 center dot-) generation was emphatically elucidated by the analyses of radicals, PS utilization, TOC removal and metal chemical states. Finally, CuO-gamma Fe2O3+PS system displayed desirable removal of multiple organic pollutants with different molecular structures. In light of the prominent advantages of CuO-gamma Fe2O3+PS, this work extended activated PS process in treating refractory organic wastewater. (C) 2019 Elsevier Ltd. All rights reserved. ...Hide

DOI：10.1016/j.chemosphere.2019.125191
百度学术：An efficient CuO-gamma Fe2O3 composite activates persulfate for organic pollutants removal: Performance, advantages and mechanism
语言：外文
基金：National Water Pollution Control and Treatment Science and Technology Major Project of China [2018ZX07110003]
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