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首页> 外文期刊>RSC Advances >Fenton degradation of 4-chlorophenol using H2O2 in situ generated by Zn-CNTs/O2 system
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Fenton degradation of 4-chlorophenol using H2O2 in situ generated by Zn-CNTs/O2 system

机译：Zn-CNTs / O 2 系统生成的H 2 O 2 原位芬顿降解4-氯苯酚

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In this study, Zn-CNT composites were prepared by the infiltration fusion method and characterized by TEM, XPS and N2 adsorption/desorption experiments. The reaction of Zn-CNTs and O2 in aqueous solution was performed for the in situ generation of H2O2, which was employed to react with Fe2+ for the Fenton degradation of 4-chlorophenol (4-CP). The effect of various parameters, including the initial pH, dosage of Zn-CNTs and Fe2+ concentration on 4-CP degradation was examined. The removal efficiencies of 4-CP and TOC (total organic carbon) were 98.8% and 87.4%, respectively, when the Fe2+ concentration was 20 mg L?1, initial pH was 2.0, Zn-CNT dosage was 2 g L?1, reaction time was 20 min and O2 flow rate was 400 mL min?1. When 4-CP was spiked in the secondary effluent of a municipal wastewater treatment plant, the removal efficiency of 4-CP and TOC was 47.0% and 45.6%, respectively, under the above-mentioned conditions. The intermediate products were detected by LC-MS and IC, and the possible degradation pathway of 4-CP and the reaction mechanism of the Zn-CNTs/O2/Fe2+ system were tentatively proposed.
机译：本研究采用渗透熔融法制备了Zn-CNT复合材料，并通过TEM，XPS和N 2 吸附/脱附实验对其进行了表征。 Zn-CNTs与O 2 在水溶液中的反应用于H 2 < / sub> O 2 ，用于与F 2 + 的Fenton反应降解4-氯苯酚（4-CP）。考察了初始pH值，Zn-CNTs的用量和Fe 2 + 浓度等参数对4-CP降解的影响。当Fe 2 + 浓度为20 mg L 时，4-CP和TOC（总有机碳）的去除效率分别为98.8％和87.4％。 ？1 ，初始pH为2.0，Zn-CNT剂量为2 g L ？1 ，反应时间为20分钟， O 2 流速为400 mL min ？1 。在上述条件下，当在城市污水处理厂的二级废水中加入4-CP时，4-CP和TOC的去除效率分别为47.0％和45.6％。通过LC-MS和IC检测中间产物，以及4-CP的可能降解途径和Zn-CNTs / O 2 / Fe <的反应机理初步提出了small> 2 + 系统。

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