双阴膜流动电极电容去离子净化含铬废水

刘翰隆; 张春鹏; 张思瑶; 张洋; 任学志; 杜雅琳; 张爽; 马语璠; 王彧洋

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (7) : 3799-3806.

水污染与控制

双阴膜流动电极电容去离子净化含铬废水

刘翰隆^1,2, 张春鹏^1,2, 张思瑶^1,2, 张洋^1,2, 任学志^1,2, 杜雅琳^1,2, 张爽^1,2, 马语璠¹, 王彧洋^1,2

作者信息 +

Purification of chromium-containing wastewater using symmetric anion-exchange membrane flow-electrode capacitive deionization.

LIU Han-long^1,2, ZHANG Chun-peng^1,2, ZHANG Si-yao^1,2, ZHANG Yang^1,2, REN Xue-zhi^1,2, DU Ya-lin^1,2, ZHANG Shuang^1,2, MA Yu-fan¹, WANG Yu-yang^1,2

Author information +

文章历史 +

摘要

开发了一种完全对称的“双阴膜”流动电极电容去离子(SFCDI)装置处理含六价铬Cr (VI)废水,采用双阴离子交换膜和短路闭合模式,无需高浓度背景离子,即可实现高效Cr (VI)去除.结果表明,这一构型的显著特点是避免了传统FCDI中因使用阳离子交换膜而导致的Cr³⁺回渗与总Cr浓度反弹问题.在1.2V电压、初始pH 5.0条件下,SFCDI在150min内将Cr (VI)浓度从50mg/L降低至0.41mg/L,总Cr去除效率达97.55%,能耗仅为0.12kWh/m³.与传统FCDI相比,SFCDI显著提高了总Cr去除效率并有效阻止Cr³⁺回流.进一步研究分析了电压、活性炭含量、pH值及共存阴离子对处理性能的影响,并验证了SFCDI在连续运行及实际电镀废水处理中的适用性和稳定性.在180min内,对实际电镀废水的Cr (VI)去除率达97.68%,展现出绿色、高效、低能耗的应用潜力.

Abstract

A fully symmetric "dual-anion membrane" flow-electrode capacitive deionization (SFCDI) device was developed for treating wastewater containing hexavalent chromium (Cr(VI)). By employing dual anion-exchange membranes and operating in a short-circuit discharge mode, efficient Cr(VI) removal can be achieved without the need for high concentration background ions. Results showed that, a key feature of this configuration is its ability to prevent Cr³⁺ back-diffusion and total chromium concentration rebound, which are common issues in traditional FCDI systems using cation-exchange membranes. Under conditions of 1.2V applied voltage and an initial pH of 5.0, the SFCDI reduced the Cr(VI) concentration from 50mg/L to 0.41mg/L within 150minutes, achieving a total chromium removal efficiency of 97.55% with an energy consumption of only 0.12kWh/m³. Compared to traditional FCDI, SFCDI significantly improved the total chromium removal efficiency while effectively preventing Cr³⁺ backflow. Further research systematically analyzed the effects of voltage, activated carbon content, pH, and coexisting anions on performance and demonstrated the applicability and stability of SFCDI in continuous operation and actual electroplating wastewater treatment. Within 180minutes, the removal rate of Cr(VI) in actual electroplating wastewater reached 97.68%, showcasing its potential as a green, efficient, and low-energy solution.

导出引用

刘翰隆, 张春鹏, 张思瑶, 张洋, 任学志, 杜雅琳, 张爽, 马语璠, 王彧洋. 双阴膜流动电极电容去离子净化含铬废水[J]. 中国环境科学. 2025, 45(7): 3799-3806

LIU Han-long, ZHANG Chun-peng, ZHANG Si-yao, ZHANG Yang, REN Xue-zhi, DU Ya-lin, ZHANG Shuang, MA Yu-fan, WANG Yu-yang. Purification of chromium-containing wastewater using symmetric anion-exchange membrane flow-electrode capacitive deionization.[J]. China Environmental Science. 2025, 45(7): 3799-3806

中图分类号： X703.1

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