CTAC改性活性炭制备CDI电极性能

刘晓艳; 王一楠; 陆谢娟; 陈才; 吴晓晖; 毛娟

doi:10.7524/j.issn.0254-6108.2019100902

环境化学

CTAC改性活性炭制备CDI电极性能

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刘晓艳, 王一楠, 陆谢娟, 陈才, 吴晓晖, 毛娟. CTAC改性活性炭制备CDI电极性能[J]. 环境化学, 2020, (3): 821-827. doi: 10.7524/j.issn.0254-6108.2019100902

引用本文:

刘晓艳, 王一楠, 陆谢娟, 陈才, 吴晓晖, 毛娟. CTAC改性活性炭制备CDI电极性能[J]. 环境化学, 2020, (3): 821-827. doi: 10.7524/j.issn.0254-6108.2019100902

LIU Xiaoyan, WANG Yinan, LU Xiejuan, CHEN Cai, WU Xiaohui, MAO Juan. Investigation on the electrode performance of CTAC modified activated carbon in capacitive deionization[J]. Environmental Chemistry, 2020, (3): 821-827. doi: 10.7524/j.issn.0254-6108.2019100902

Citation:

LIU Xiaoyan, WANG Yinan, LU Xiejuan, CHEN Cai, WU Xiaohui, MAO Juan. Investigation on the electrode performance of CTAC modified activated carbon in capacitive deionization[J]. Environmental Chemistry, 2020, (3): 821-827. doi: 10.7524/j.issn.0254-6108.2019100902

CTAC改性活性炭制备CDI电极性能

1. 武汉科技大学城市建设学院, 武汉, 430065;
2. 华中科技大学环境科学与工程学院, 武汉, 430074

通讯作者: 陆谢娟, E-mail: xiejuan_lu@163.com ;

基金项目:
国家重点研发计划项目（2016YFC0400704）资助.

Investigation on the electrode performance of CTAC modified activated carbon in capacitive deionization

1. School of Urban Construction, Wuhan University of Science and Technology, Wuhan, 430065, China;
2. School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China

Corresponding author: LU Xiejuan, xiejuan_lu@163.com ;

Fund Project: Supported by the National Key Research and Development Program of China (2016YFC0400704).

摘要: 采用十六烷基三甲基氯化铵（CTAC）改性粉末活性炭（PAC），来提高活性炭电极的电化学性能和电极对砷离子的吸附能力.以质量浓度为1 mmol·L^-1的CTAC改性粉末活性炭（PAC）12 h，并以此活性炭制备电极，电极的比电容为67 F·g^-1，相比未改性PAC电极提升45%，电极扩散电阻稍有增加.通过优化电极制备成分配比，以CB：PVDF：CTAC-PAC=15：5：80比例制备的CTAC-PAC电极的比电容为112 F·g^-1，相比未改性PAC电极提升143%，扩散电阻稍有增加.在100 μg·L^-1砷溶液吸附实验中，优化制备条件后的CTAC-PAC电极，对砷离子吸附量相比未改性PAC电极提升32%，出水砷浓度为8 μg·L^-1.
- 电容去离子 /
- 阳离子表面活性剂 /
- 粉末活性炭 /
- 改性活性炭电极 /
- 除砷
Abstract: The electrochemical performance of activated carbon electrode was improved using the powdered activated carbon (PAC) modified with hexadecyl trimethyl ammonium chloride (CTAC), also the arsenic ions adsorption capacity of the electrode was enhanced. The activated carbon was prepared by CTAC with a mass concentration of 1 mmol·L^-1 for 12h, specific capacitance was shown as 67 F·g^-1, which was increased 45% comparing with the original PAC electrode, and the diffusion resistance of the electrode was also enhanced slightly. The composition ratio of CB:PVDF:CTAC-PAC was optimized as 15:5:80, with a 112 F·g^-1 of the specific capacitance of the CTAC-PAC electrode, which was 143% higher than that of the pristine PAC electrode, the diffusion resistance was also increased slightly. Employing the optimized CTAC-PAC electrode, the adsorption capacity of arsenic ions was to be 32% higher than that of the raw PAC electrode with 100 μg·L^-1 of arsenic feed loading, the effluent concentration of arsenic was 8 μg·L^-1.
- capacitive deionization /
- cationic surface active agent /
- powdered activated carbon /
- modified activated carbon electrode /
- arsenic removal

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CTAC改性活性炭制备CDI电极性能

通讯作者: 陆谢娟, E-mail: xiejuan_lu@163.com ;

1. 武汉科技大学城市建设学院, 武汉, 430065;
2. 华中科技大学环境科学与工程学院, 武汉, 430074

收稿日期: 2019-10-20

基金项目:

国家重点研发计划项目（2016YFC0400704）资助.

关键词:

摘要: 采用十六烷基三甲基氯化铵（CTAC）改性粉末活性炭（PAC），来提高活性炭电极的电化学性能和电极对砷离子的吸附能力.以质量浓度为1 mmol·L^-1的CTAC改性粉末活性炭（PAC）12 h，并以此活性炭制备电极，电极的比电容为67 F·g^-1，相比未改性PAC电极提升45%，电极扩散电阻稍有增加.通过优化电极制备成分配比，以CB：PVDF：CTAC-PAC=15：5：80比例制备的CTAC-PAC电极的比电容为112 F·g^-1，相比未改性PAC电极提升143%，扩散电阻稍有增加.在100 μg·L^-1砷溶液吸附实验中，优化制备条件后的CTAC-PAC电极，对砷离子吸附量相比未改性PAC电极提升32%，出水砷浓度为8 μg·L^-1.

English Abstract

Investigation on the electrode performance of CTAC modified activated carbon in capacitive deionization

Corresponding author: LU Xiejuan, xiejuan_lu@163.com ;

1. School of Urban Construction, Wuhan University of Science and Technology, Wuhan, 430065, China;
2. School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China

Received Date: 2019-10-20

Fund Project: Supported by the National Key Research and Development Program of China (2016YFC0400704).

Keywords:

Abstract: The electrochemical performance of activated carbon electrode was improved using the powdered activated carbon (PAC) modified with hexadecyl trimethyl ammonium chloride (CTAC), also the arsenic ions adsorption capacity of the electrode was enhanced. The activated carbon was prepared by CTAC with a mass concentration of 1 mmol·L^-1 for 12h, specific capacitance was shown as 67 F·g^-1, which was increased 45% comparing with the original PAC electrode, and the diffusion resistance of the electrode was also enhanced slightly. The composition ratio of CB:PVDF:CTAC-PAC was optimized as 15:5:80, with a 112 F·g^-1 of the specific capacitance of the CTAC-PAC electrode, which was 143% higher than that of the pristine PAC electrode, the diffusion resistance was also increased slightly. Employing the optimized CTAC-PAC electrode, the adsorption capacity of arsenic ions was to be 32% higher than that of the raw PAC electrode with 100 μg·L^-1 of arsenic feed loading, the effluent concentration of arsenic was 8 μg·L^-1.