Deng Wei, Lv Xiaoli, Xu Zhe, Zhang Qingrui, Zhao Min, Huang Xianfeng
National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, China; School of Engineering, University of Northern British Columbia, 3333 University Way, V2N 4Z9, British Columbia, Canada.
National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, 325035, China.
J Environ Manage. 2025 May;382:125339. doi: 10.1016/j.jenvman.2025.125339. Epub 2025 Apr 15.
Heavy metal complexes (HMCs) pose significant ecological challenges while also holding attractive economic value. This review comprehensively summarizes advanced techniques for recovering HMCs from wastewater, including reductive recovery, oxidative decomplexation-recovery, and non-redox separation. Physical and chemical separation approaches utilize specific properties of metal complexes for efficient segregation. Specifically, we explore oxidative decomposition techniques, emphasizing the underlying mechanisms and practical application for selective and non-selective decomplexation techniques. The crucial role of cathodic potential on the efficiency and selectivity of electrochemical reduction processes is also examined. In addition, a comprehensive cost assessment, including energy consumption, associated with these recovering processes is investigated, and opinions on the inadequacy of current studies are provided. Overall, this review uniquely integrates findings on selective physical separation, oxidation, and reduction processes as well as the cost assessments for these techniques, providing a novel and comprehensive perspective on heavy metal recovery. It aims to bridge existing gaps in literature and advance the development of effective recovery methodologies for HMCs.
重金属络合物（HMCs）带来了重大的生态挑战，但同时也具有诱人的经济价值。本综述全面总结了从废水中回收HMCs的先进技术，包括还原回收、氧化解络合-回收和非氧化还原分离。物理和化学分离方法利用金属络合物的特定性质进行有效分离。具体而言，我们探讨了氧化分解技术，重点介绍了选择性和非选择性解络合技术的潜在机制和实际应用。还研究了阴极电位对电化学还原过程效率和选择性的关键作用。此外，对这些回收过程的综合成本评估，包括能源消耗，进行了调查，并对当前研究的不足之处提出了看法。总体而言，本综述独特地整合了关于选择性物理分离、氧化和还原过程的研究结果以及这些技术的成本评估，为重金属回收提供了新颖而全面的视角。它旨在弥合现有文献中的差距，并推动HMCs有效回收方法的发展。
