School of Environment and Civil Engineering, Research Center for Eco-Environment Engineering, Dongguan University of Technology, Dongguan 523106, Guangdong, PR China.
Bonnietech (Dongguan) Applied Materials Company, Dongguan 523106, Guangdong, PR China.
J Hazard Mater. 2023 Sep 5;457:131785. doi: 10.1016/j.jhazmat.2023.131785. Epub 2023 Jun 7.
In modern industry, selective extraction and recovery of Cu from strongly acidic electroplating effluent are crucial to reduce carbon emissions, alleviate resource scarcity, and mitigate water pollution, yielding considerable economic and environmental benefits. This study proposed a high-efficiency CuSe electrode to selectively remove Cu from electroplating effluent via hybrid capacitive deionization (HCDI). The potential of this electrode was thoroughly evaluated to assess its effectiveness. The CuSe electrode exhibited superior deionization performance in terms of Cu adsorption capacity, selectivity, and applicability in various water matrices. Specifically, under strong acid conditions (1 M H), the CuSe electrode maintained an optimal adsorption capacity of 357.36 mg g toward Cu. In systems containing salt ions, heavy metals, and actual electroplating wastewater, the CuSe electrode achieved a remarkable removal efficiency of up to 90% for Cu with a high distribution coefficient K. Notably, the capacitive deionization (CDI) system demonstrated the simultaneous removal of Cu-EDTA. The removal mechanism was further revealed using ex-situ X-ray diffraction and X-ray photoelectron spectroscopy analyses. Overall, this study presents a practical approach that extends the capabilities of CDI platforms for effectively removing and recovering Cu from acidic electroplating effluent.
在现代工业中，从强酸性电镀废水中选择性地提取和回收铜对于减少碳排放、缓解资源短缺和减轻水污染至关重要，具有显著的经济效益和环境效益。本研究提出了一种高效的 CuSe 电极，通过混合电容去离子（HCDI）技术从电镀废水中选择性地去除铜。本研究深入评估了该电极的潜力，以评估其有效性。CuSe 电极在铜吸附容量、选择性和在各种水基质中的适用性方面表现出优异的去离子性能。具体而言，在强酸条件（1 M H）下，CuSe 电极对铜的最佳吸附容量为 357.36 mg g。在含有盐离子、重金属和实际电镀废水的系统中，CuSe 电极对铜的去除效率高达 90%，分配系数 K 很高。值得注意的是，电容去离子（CDI）系统还实现了 Cu-EDTA 的同时去除。通过原位 X 射线衍射和 X 射线光电子能谱分析进一步揭示了去除机制。总的来说，本研究提出了一种实用的方法，扩展了 CDI 平台从酸性电镀废水中有效去除和回收铜的能力。
