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Review

Acidic Wastewater from Electrode Foil Manufacturing: Treatment Advances and Future Pathways

1
Center of New Energy Research, School of Intelligence Science and Technology (School of Future Technology), Xinjiang University, Urumqi 830047, China
2
Department of Foreign Languages, Yantai Nanshan University, Yantai 265713, China
3
Sinopec Research Institute of Petroleum Processing Co., Ltd., Beijing 100083, China
4
Shihezi Joinchin Electrode Foil Co., Ltd., No. 21, Beiba Road, Shihezi Development Zone, Shihezi 20393, China
5
Wanhua Chemical Group Co., Ltd. Yantai 600309, China
*
Authors to whom correspondence should be addressed.
Water 2025, 17(22), 3325; https://doi.org/10.3390/w17223325
Submission received: 9 September 2025 / Revised: 11 November 2025 / Accepted: 13 November 2025 / Published: 20 November 2025
(This article belongs to the Section Wastewater Treatment and Reuse)

Abstract

The rapid expansion of the electrode foil industry has led to the generation of large volumes of acidic wastewater containing strong acids (sulfuric and hydrochloric) and metal ions (such as aluminum and copper). The generated wastewater poses serious environmental challenges, including infrastructure corrosion, soil acidification, and toxicity to aquatic life. This review evaluates three primary treatment approaches: neutralization (adjusting pH and removing metals), ion adsorption (selective recovery of metals and acid recycling), and membrane separation (precision resource recovery). Neutralization is cost-effective for pH adjustment and metal removal but is limited by secondary pollution and low resource recovery. Ion adsorption allows for the targeted recovery of metals and recycling of acid, although it faces challenges related to high costs and scalability. Membrane separation offers accurate separation and resource recovery but is affected by fouling and high energy requirements. Future research should focus on integrated treatment strategies, AI-driven process optimization, and the development of advanced materials to enhance sustainable wastewater management. These efforts aim to provide a scientific basis and technical reference for wastewater treatment in the electrode foil industry.
Keywords: acidic wastewater; metal ions; neutralization; ion adsorption; membrane separation acidic wastewater; metal ions; neutralization; ion adsorption; membrane separation

Share and Cite

MDPI and ACS Style

Wu, G.; Wang, L.; Qin, B.; Meng, F.; He, Y.; Wang, X.; Bai, J.; Zhang, J.; Wang, Y. Acidic Wastewater from Electrode Foil Manufacturing: Treatment Advances and Future Pathways. Water 2025, 17, 3325. https://doi.org/10.3390/w17223325

AMA Style

Wu G, Wang L, Qin B, Meng F, He Y, Wang X, Bai J, Zhang J, Wang Y. Acidic Wastewater from Electrode Foil Manufacturing: Treatment Advances and Future Pathways. Water. 2025; 17(22):3325. https://doi.org/10.3390/w17223325

Chicago/Turabian Style

Wu, Guodong, Lu Wang, Bing Qin, Fanbin Meng, Yonghu He, Xin Wang, Jing Bai, Jingpeng Zhang, and Yuanhao Wang. 2025. "Acidic Wastewater from Electrode Foil Manufacturing: Treatment Advances and Future Pathways" Water 17, no. 22: 3325. https://doi.org/10.3390/w17223325

APA Style

Wu, G., Wang, L., Qin, B., Meng, F., He, Y., Wang, X., Bai, J., Zhang, J., & Wang, Y. (2025). Acidic Wastewater from Electrode Foil Manufacturing: Treatment Advances and Future Pathways. Water, 17(22), 3325. https://doi.org/10.3390/w17223325

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