Copper removal and recovery from electroplating effluent with wide pH ranges through hybrid capacitive deionization using CuSe electrode

Shiyong Wang; Haohong Zhuang; Xiaoyan Shen; Lin Zhao; Zhihao Pan; Lizhi Liu; Sihao Lv; Gang Wang

doi:10.1016/j.jhazmat.2023.131785

Copper removal and recovery from electroplating effluent with wide pH ranges through hybrid capacitive deionization using CuSe electrode

J Hazard Mater. 2023 Sep 5:457:131785. doi: 10.1016/j.jhazmat.2023.131785. Epub 2023 Jun 7.

Authors

Shiyong Wang¹, Haohong Zhuang¹, Xiaoyan Shen¹, Lin Zhao¹, Zhihao Pan¹, Lizhi Liu², Sihao Lv¹, Gang Wang³

Affiliations

¹ School of Environment and Civil Engineering, Research Center for Eco-Environment Engineering, Dongguan University of Technology, Dongguan 523106, Guangdong, PR China.
² Bonnietech (Dongguan) Applied Materials Company, Dongguan 523106, Guangdong, PR China.
³ School of Environment and Civil Engineering, Research Center for Eco-Environment Engineering, Dongguan University of Technology, Dongguan 523106, Guangdong, PR China; Guangdong Provincial Key Laboratory of Intelligent Disaster Prevention and Emergency Technologies for Urban Lifeline Engineering, Dongguan 523106, Guangdong, PR China. Electronic address: wghy1979@163.com.

PMID: 37301073
DOI: 10.1016/j.jhazmat.2023.131785

Abstract

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^-1 toward Cu²⁺. In systems containing salt ions, heavy metals, and actual electroplating wastewater, the CuSe electrode achieved a remarkable removal efficiency of up to 90% for Cu²⁺ with a high distribution coefficient K_d. 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.

Keywords: Acidic electroplating effluent; Copper ion; CuSe; Hybrid capacitive deionization; Selective adsorption.