Contamination of water sources by Hg(II) is still a severe environmental issue. Among various Hg(II) removal technologies, the metal-based reductive removal of Hg(II) has been considered as one of the promising and innovative approaches in natural and engineered aquatic environments. A critical review of the recent advances in the metallic catalysts was provided based on the summary of current existing environmental technologies. In this contribution, two types of Hg(II) reduction by metallic catalysts with supports and with surface functionalization (–SH and –NH) were summarized and discussed. This review also addressed the most critical operational parameters, durability of catalysts, and potential limitation in their applications for the treatment of water and wastewater. Finally, future prospects of catalytic Hg(II) removal technologies were provided.

Hg(II) 对水源的污染仍然是一个严重的环境问题。在各种 Hg(II) 去除技术中，基于金属的 Hg(II) 还原去除被认为是自然和工程水生环境中很有前景的创新方法之一。基于对当前现有环境技术的总结，对金属催化剂的最新进展进行了批判性回顾。在这篇文章中，总结和讨论了两种类型的 Hg(II) 还原金属催化剂与载体和表面功能化（-SH 和 -NH）。这篇综述还讨论了最关键的操作参数、催化剂的耐用性，以及它们在处理水和废水方面的应用中的潜在限制。最后，