活性炭纤维阴极增强电-KMnO4去除水中双氯芬酸

朱云华; 朱轩墨; 王旭旭; 张轩; 郑怀礼; 邓慧萍; 赵纯

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中国环境科学 ›› 2020, Vol. 40 ›› Issue (3) : 1139-1145.

水污染与控制

活性炭纤维阴极增强电-KMnO₄去除水中双氯芬酸

朱云华¹, 朱轩墨², 王旭旭¹, 张轩¹, 郑怀礼¹, 邓慧萍³, 赵纯¹

作者信息 +

Removal of diclofenac in solution by activated carbon fiber cathode enhanced electro-permanganate process

ZHU Yun-hua¹, ZHU Xuan-mo², WANG Xu-xu¹, ZHANG Xuan¹, ZHENG Huai-li¹, DENG Hui-ping³, ZHAO Chun¹

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文章历史 +

摘要

为考察单独活性炭纤维（ACF），高锰酸钾（PM），电化学（E），电-高锰酸钾（E-PM），活性炭纤维-高锰酸钾（ACF-PM）以及电-活性炭纤维阴极-高锰酸钾体系（E-ACF-PM）对水中双氯芬酸的降解效果，研究了电流强度，溶液初始pH值对E-ACF-PM体系去除水中双氯芬酸的影响，通过ACF表面形态分析，自由基捕获实验，络合反应等探索了E-ACF-PM体系的反应机理.结果表明，在E-ACF-PM体系中电化学（E-ACF）和PM之间有明显的协同作用，双氯芬酸被快速去除.随着电流强度增加（50~200mA），双氯芬酸去除率增大；pH值增大，体系对双氯芬酸的去除效果越差，pH值为11时去除率仅为31.70%.与ACF-PM体系相比，E-ACF-PM体系阴极电场可以保护ACF不被破坏，同时吸附在ACF上的Mn （VII）得到电子，快速转化成活性氧化剂Mn （III），实现对目标污染物的快速去除.

Abstract

The removal of diclofenac (DCF) by activated carbon fiber (ACF), potassium permanganate (PM), electrolysis (E), E-PM, ACF-PM, and E-ACF-PM processes were studied. The influences of current intensity and initial pH value on the removal of DCF by E-ACF-PM process were investigated. The reaction mechanism of E-ACF-PM process for DCF removal was also explored by the analysis of ACF surface morphology, radical scavengers experiment and complex reaction. E-ACF and PM processes have an obvious synergistic effect. DCF could be rapidly removed in E-ACF-PM process. The removal of DCF increased with the increase of current intensity from 50 to 200 mA, and decreased significantly as the pH values ranged from acidic to alkaline conditions. Only 31.70% of DCF was removed in E-ACF-PM process at initial pH value of 11. ACF could be protected from destroyed by the cathode electric field in E-ACF-PM process compared with ACF-PM process, and the active oxidant-Mn(III) was generated though PM adsorbed on ACF cathode for the rapid degradation of DCF.

导出引用

朱云华, 朱轩墨, 王旭旭, 张轩, 郑怀礼, 邓慧萍, 赵纯. 活性炭纤维阴极增强电-KMnO₄去除水中双氯芬酸[J]. 中国环境科学. 2020, 40(3): 1139-1145

ZHU Yun-hua, ZHU Xuan-mo, WANG Xu-xu, ZHANG Xuan, ZHENG Huai-li, DENG Hui-ping, ZHAO Chun. Removal of diclofenac in solution by activated carbon fiber cathode enhanced electro-permanganate process[J]. China Environmental Science. 2020, 40(3): 1139-1145

中图分类号： X703.1

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