With the development of our society, the desire to recover valuable metal resources from metal-containing wastewaters or natural water bodies is becoming increasingly stronger nowadays. To overcome the limitations of single techniques, coupling technologies with synergistic effects are attracting increasing attention regarding metal resource recovery from water with particular interest in electrochemical coupling technologies in view of the advantages of electrochemical methods. This state-of-the-art review comprehensively presented the mechanisms and performance of electrochemical coupling systems for metal recovery from water. To give a clear overview of current research trends, technologies coupled with electrochemical processes can be categorized into six main types: electrochemical techniques, membrane modules, adsorption/extraction techniques, sonication technologies, energy supply techniques and others. The electrochemical coupling system has shown synergistic advantages (e.g., improving metal recovery efficiency, reducing energy consumption) over single technologies. We then discuss the remaining challenges, present corresponding solutions, and put forward future directions for current electrochemical coupled systems towards metal recovery. This review is conducive to broadening the potential applications of electrochemical coupling processes for metal recovery and sustainable water treatment.

随着社会的发展，从含金属废水或天然水体中回收有价值的金属资源的愿望越来越强烈。为了克服单一技术的局限性，具有协同效应的耦合技术在从水中回收金属资源方面越来越受到关注，鉴于电化学方法的优势，电化学耦合技术尤其受到关注。这篇最先进的综述全面介绍了电化学耦合系统从水中回收金属的机制和性能。为了清晰地概述当前的研究趋势，与电化学过程相结合的技术可以分为六大类：电化学技术、膜组件、吸附/提取技术、超声技术、能量供应技术等。与单一技术相比，电化学耦合系统显示出协同优势（例如，提高金属回收效率、降低能耗）。然后，我们讨论了剩余的挑战，提出了相应的解决方案，并提出了当前电化学耦合系统在金属回收方面的未来方向。本综述有利于拓宽电化学耦合工艺在金属回收和可持续水处理方面的潜在应用。然后，我们讨论了剩余的挑战，提出了相应的解决方案，并提出了当前电化学耦合系统在金属回收方面的未来方向。本综述有利于拓宽电化学耦合工艺在金属回收和可持续水处理方面的潜在应用。然后，我们讨论了剩余的挑战，提出了相应的解决方案，并提出了当前电化学耦合系统在金属回收方面的未来方向。本综述有利于拓宽电化学耦合工艺在金属回收和可持续水处理方面的潜在应用。