期刊
CHEMOSPHERE
卷 208, 期 -, 页码 665-673出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2018.06.016
关键词
In-situ generation H2O2; Zn-0-CNTs-Fe3O4 composite; Heterogeneous Fenton; 4-chlorophenol
资金
- Key Laboratory of Special Wastewater Treatment, Sichuan Province Higher Education System [SWWT2015-1]
A novel Zn-0-CNTs-Fe3O4 composite was synthesized by the chemical co-precipitation combined with high sintering process at nitrogen atmosphere. The as-prepared composite was characterized by SEM, EDS, XRD, XPS, VSM and N-2 adsorption/desorption experiments. A novel heterogeneous Fenton-like system, composed of Zn-0-CNTs-Fe3O4 composite and dissolved oxygen (02) in solution, which can in situ generate H2O2 and (OH)-O-center dot, was used for the degradation of 4-chlorophenol (4-CP). The influences of various operational parameters, including the initial pH, dosage of Zn-0-CNTs-Fe3O4 and initial concentration of 4-CP on the removal of 4-CP were investigated. The removal efficiencies of 4-CP and total organic carbon (TOC) were 99% and 57%, respectively, at the initial pH of 1.5, Zn-0-CNTs-Fe3O4 dosage of 2 g/L, 4-CP initial concentration of 50 mg/L and oxygen flow rate of 400 mL/min. Based on the results of the radical scavenger effect study, the hydroxyl radical was considered as the main reactive oxidants in Zn-0-CNTs-Fe3O4/O-2 system and a possible degradation pathway of 4-CP was proposed. (C) 2018 Published by Elsevier Ltd.
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