| 纳米Fe3C/炭纤维非均相电芬顿降解二甲基砷的研究 |
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| 引用本文： | 李建斐,李一兵,孙猛,安晓强,许文泽,童雅婷,兰华春.纳米Fe3C/炭纤维非均相电芬顿降解二甲基砷的研究[J].环境科学学报,2016,36(9):3230-3236. |
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| 作者姓名： | 李建斐 李一兵 孙猛 安晓强 许文泽 童雅婷 兰华春 |
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| 作者单位： | 1. 河北工业大学土木工程学院, 天津 300400;2. 中国科学院生态环境研究中心, 饮用水科学与技术重点实验室, 北京 100085,河北工业大学土木工程学院, 天津 300400,中国科学院生态环境研究中心, 饮用水科学与技术重点实验室, 北京 100085,中国科学院生态环境研究中心, 饮用水科学与技术重点实验室, 北京 100085,1. 河北工业大学土木工程学院, 天津 300400;2. 中国科学院生态环境研究中心, 饮用水科学与技术重点实验室, 北京 100085,1. 河北工业大学土木工程学院, 天津 300400;2. 中国科学院生态环境研究中心, 饮用水科学与技术重点实验室, 北京 100085,中国科学院生态环境研究中心, 饮用水科学与技术重点实验室, 北京 100085 |
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| 基金项目： | 国家自然科学基金（No.51478455） |
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| 摘 要： | 针对结构稳定且难以靠常规方法去除的二甲基砷,制备新型负载Fe_3C纳米粒子的炭纤维催化剂,并对其非均相电芬顿降解二甲基砷进行了研究.结果表明,纳米Fe_3C/CF与阴极产生的H2O2发生电芬顿催化反应产生羟基自由基将二甲基砷降解为一甲基砷和As(V),As(V)可被同步吸附在Fe_3C/CF催化剂表面.通过考察电催化过程中初始p H、反应物初始浓度、电流强度和催化剂投加量等因素对催化氧化DMA效果的影响,表明在初始p H为3,二甲基砷初始浓度为5 mg·L~(-1),Fe_3C/CF投量为500 mg·L~(-1)的最佳条件下,经非均相电芬顿反应360 min后,二甲基砷去除率高达96%.
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| 关 键 词： | Fe3C/碳纤维催化剂 二甲基砷 非均相电芬顿 电催化降解 |
| 收稿时间： | 2015/11/1 0:00:00 |
| 修稿时间： | 2015/11/15 0:00:00 |
Fe3C loaded carbon nanofibers as heterogeneous catalysts for the electro-fenton degradation of dimethyl arsenic |
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| LI Jianfei,LI Yibing,SUN Meng,An Xiaoqiang,XU Wenze,TONG Yating and LAN Huachun.Fe3C loaded carbon nanofibers as heterogeneous catalysts for the electro-fenton degradation of dimethyl arsenic[J].Acta Scientiae Circumstantiae,2016,36(9):3230-3236. |
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| Authors: | LI Jianfei LI Yibing SUN Meng An Xiaoqiang XU Wenze TONG Yating and LAN Huachun |
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| Institution: | 1. College of Civil Engineering, Hebei University of Technology, Tianjin 300400;2. State Key Laboratory of Environment Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,College of Civil Engineering, Hebei University of Technology, Tianjin 300400,State Key Laboratory of Environment Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,State Key Laboratory of Environment Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,1. College of Civil Engineering, Hebei University of Technology, Tianjin 300400;2. State Key Laboratory of Environment Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,1. College of Civil Engineering, Hebei University of Technology, Tianjin 300400;2. State Key Laboratory of Environment Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 and State Key Laboratory of Environment Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 |
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| Abstract: | This work focuses on the removal of dimethyl arsenic (DMA), a typical pollutant with stable structure but difficult to be removed from water by traditional adsorption method. Here, we developed novel Fe3C loaded carbon nanofibers (Fe3C/CF) as heterogeneous catalysts for the electric fenton degradation of DMA. It is found that Fe3C/CF could react with H2O2 during the Electro-Fenton process. Due to the presence of hydroxyl radicals around the cathode, DMA was finally degraded into methyl arsenic (MMA) and As (V). The influence of experimental factors on the Electro-Fenton degradation of DMA was investigated, including initial pH, initial concentration, current density and catalyst dosage. The highest removal efficiency of 96% could be achieved under the condition of initial pH 3, initial concentration of 5 mg·L-1, current density at 0.15A and catalyst dosage of 500 mg·L-1. |
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| Keywords: | Fe3C loaded carbon nanofibers dimethyl arsenic heterogeneous electro-fenton electrocatalytic degradation |
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