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Research on the oxidative degradation of 2,4-dichlorophenol in water by Fe0-CNTs-Cu activation |
PAN Jia-min1, GONG Xiao-bo1,2, CHEN Yong1, CHEN Liu1, LIU Yong1,2 |
1. College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China; 2. Key Laboratory of Special Waste Water Treatment, Sichuan Province Higher Education System, Chengdu 610066, China |
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Abstract In order to efficiently remove chlorophenols pollutants from wastewater, which are persistent, highly toxic and difficult to biodegrade, a new material (Fe0-CNTs-Cu) that could efficiently and selectively reduce oxygen to H2O2 and decompose the in-situ H2O2 to ·OH/O2·- was prepared by high energy ball milling-high temperature melting-liquid phase reduction method. The degradation mechanism of Fe0-CNTs-Cu/O2 system was analysed, and the degradation pathway of 4-CP in this system was speculated. The degradation rate and TOC removal rate of Fe0-CNTs-Cu for 2,4-dichlorophenol (2,4-DCP) under the optimized conditions were 92.3% and 54.2%, respectively. In the Fe0-CNTs-Cu/O2 system, a corrosion cell was formed to induce the selective reduction of O2 on the surface of CNTs to H2O2, Cu0, Cu2O and CNTs as well as the in situ generated Fe2+. The in situ generated H2O2 was catalytically decomposed to the highly oxidized material ·OH/O2·-, which could efficiently oxidatively degrade 2,4-DCP.
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Received: 20 October 2020
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