| 堆叠碳纤维电极在膜电容去离子脱盐中的应用 |
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| 引用本文： | 陈旭东,李朝霞,马俊俊,王晓菊,牛建瑞,张 静,刘 春.堆叠碳纤维电极在膜电容去离子脱盐中的应用[J].河北科技大学学报,2023,44(5):513-522. |
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| 作者姓名： | 陈旭东 李朝霞 马俊俊 王晓菊 牛建瑞 张 静 刘 春 |
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| 作者单位： | 河北省科学院地理科学研究所;石家庄市排水管护中心;河北科技大学环境科学与工程学院 |
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| 摘 要： | 为了提高电化学脱盐装置中电极总吸附容量及脱盐性能，提出一种将堆叠碳纤维作为电极，且在电极之间加入钛网提升电极片层间导电性的方法。采用控制变量法设计脱盐实验，考察进水盐质量浓度、堆叠碳纤维电极厚度、增加钛网导体对脱盐性能的影响，并从吸附热力学和动力学角度分析吸附过程。结果表明：堆叠碳纤维电极会导致脱盐效率有所下降，其每层吸附容量由9.74 mg/g下降到2.86 mg/g。但通过增加多层钛网作为导电体可以有效提升脱盐速度，当增加至3层时，装置的脱盐速度较单层提高了2.1倍。堆叠碳纤维电极可解决单层电极吸附容量有限和无法长时间处理高浓度含盐水的问题，加入钛网可有效提升多层电极的导电性，从而提升脱盐性能。所提方法可为多层电极的设计及提升电极导电性提供新思路，对于电容去离子的工程化应用具有指导意义。
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| 关 键 词： | 环境工程学其他学科 堆叠电极 膜电容去离子 活性碳纤维 钛网 脱盐性能 |
| 收稿时间： | 2023/7/4 0:00:00 |
| 修稿时间： | 2023/9/28 0:00:00 |
Application of stacked carbon fiber electrodes in desalination of membrane capacitive deionization |
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| CHEN Xudong,LI Zhaoxi,MA Junjun,WANG Xiaoju,NIU Jianrui,ZHANG Jing,LIU Chun.Application of stacked carbon fiber electrodes in desalination of membrane capacitive deionization[J].Journal of Hebei University of Science and Technology,2023,44(5):513-522. |
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| Authors: | CHEN Xudong LI Zhaoxi MA Junjun WANG Xiaoju NIU Jianrui ZHANG Jing LIU Chun |
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| Abstract: | In order to improve the total adsorption capacity and desalination performance of the electrode in electrochemical desalination device, the stacked carbon fibers were used as the electrode, and titanium mesh was added between the electrodes to enhance the conductivity between the electrode layers. The control variaties was used to design desalination experiments to investigate the effects of inlet salt concentration, stacked carbon fiber electrode thickness and increased titanium mesh conductor on desalination performanceThe adsorption process was analyzed from the perspective of adsorption thermodynamics and kinetics. The experimental results show that stacking carbon fiber electrodes could lead to a decrease in desalination efficiency, the adsorption capacity of each layer decreases from 974 mg/g to 286 mg/g. But adding multiple layers of titanium mesh as a conductive material can effectively improve the desalination rate. When the spacing increases by three layers of titanium mesh, the adsorption speed increases by 21 times compared to the first layer. Stacking carbon fiber electrodes can solve the problem of limited adsorption capacity of single-layer electrodes and inability of handling high concentration saline water for a long time. Adding titanium mesh can effectively improve the conductivity of multi-layer electrodes, thereby improving desalination performance. It provides new ideas for the design of multi-layer electrodes and the improvement of electrode conductivity, and has guiding significance for the engineering application of capacitive deionization. |
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| Keywords: | other disciplines of environmental engineering stack electrode membrane capacitance deionization activated carbon fiber titanium mesh desalination performance |
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