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纳米Fe_3 C/炭纤维非均相电芬顿降解二甲基砷的研究
Alternative TitleFe_3C loaded carbon nanofibers as heterogeneous catalysts for the electro - fenton degradation of dimethyl arsenic
李建斐; 李一兵; 孙猛; 安晓强; 许文泽; 童雅婷; 兰华春
Source Publication环境科学学报
Abstract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H_2O_2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pH、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pH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%.
Other AbstractThis 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 Fe_3 C loaded carbon nanofibers (Fe_3 C/CF) as heterogeneous catalysts for the electric fenton degradation of DMA. It is found that Fe_3C/CF could react with H_2O_2 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).
KeywordFe_3c/碳纤维催化剂 二甲基砷 非均相电芬顿 电催化降解
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Document Type期刊论文
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李建斐,李一兵,孙猛,等. 纳米Fe_3 C/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.
APA 李建斐.,李一兵.,孙猛.,安晓强.,许文泽.,...&兰华春.(2016).纳米Fe_3 C/炭纤维非均相电芬顿降解二甲基砷的研究.环境科学学报,36(9),3230-3236.
MLA 李建斐,et al."纳米Fe_3 C/炭纤维非均相电芬顿降解二甲基砷的研究".环境科学学报 36.9(2016):3230-3236.
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