Hydrometallurgy recycling of heavy metals from electroplating sludge: Recent development and challenge

IF 3.7 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design Pub Date : 2025-02-01 DOI:10.1016/j.cherd.2024.12.035

Zhu Suiyi , Lan Xin , Zheng Minglin , Lin Yingzi , Li Siwen , Htet Oo Kaung , Yang Weilu , Qin Wensheng , Jadambaa Temuujin , Yu Yang , Liu Jiancong , Luo Wenjing , Chen Yu

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引用次数: 0

Abstract

Electroplating sludge contains various heavy metals along with impurities such as iron, aluminum, silicon, and calcium. The hydrometallurgical route offers significant advantages for recovering high-purity heavy metal products from sludge, including sponge, salt, and oxyhydroxides. This paper reviews classical hydrometallurgical processes, such as selective leaching, thermochemical extraction, precipitation, and crystallization. Given the co-dissolution of heavy metals and impurities in acidic or alkaline solutions, the efficient separation of impurities is emphasized to simplify these often complex hydrometallurgical processes. Additionally, this review explores the chemical transformation and separation of impurities into byproducts such as gypsum, anorthite, hematite, giniite, boehmite, and natroalunite. Ultimately, this review provides a theoretical foundation for the effective treatment and resource recovery of industrial electroplating sludge.

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来源期刊

Chemical Engineering Research & Design 工程技术-工程：化工

CiteScore

6.10

自引率

7.70%

发文量

623

审稿时长

42 days

期刊介绍： ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering. Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.