Nanotechnology has immensely contributed for the treatment of contaminated water with the development of nano-adsorbents. In last few years, the demand of nano-adsorbents in the water industry has grown rapidly. Therefore, regeneration of utilized adsorbents has become a foremost issue as they are often hazardous. Different techniques for regeneration of adsorbents have been developed such as thermal, steam, chemical, microwave-assisted, electrochemical, and bio-regeneration. For this, different parameters and factors should be taken into account for efficient adsorbents regeneration such as pH, temperature and time. These applied regeneration strategies play a major role in the improvement of adsorbent’s lifetime, adsorption cycles and replacement rate. Moreover, recovery of precious metals can only be possible by desorption of the metals adsorbed through suitable regeneration techniques. Thus, regeneration can contribute towards the balance of ecology and environmental safety by enhancing the application cycles. This comprehensive review is an attempt to help the scientific community working on adsorption studies to take up research initiatives required to address the feasible recovery methods of adsorbed materials from the used adsorbents, to study the possible reuse of the desorbing agents, and to choose a suitable desorbing/regenerating agent for a particular application.

随着纳米吸附剂的发展，纳米技术为污水处理做出了巨大贡献。近年来，水行业对纳米吸附剂的需求增长迅速。因此，使用的吸附剂的再生已成为首要问题，因为它们通常是危险的。已经开发了不同的吸附剂再生技术，例如热再生、蒸汽再生、化学再生、微波辅助再生、电化学再生和生物再生。为此，应考虑不同参数和因素以实现有效的吸附剂再生，例如 pH、温度和时间。这些应用的再生策略在提高吸附剂的寿命、吸附循环和置换率方面发挥着重要作用。而且，只有通过合适的再生技术解吸吸附的金属才能回收贵金属。因此，再生可以通过提高应用周期来促进生态和环境安全的平衡。这篇综合综述试图帮助从事吸附研究的科学界采取必要的研究举措，解决从用过的吸附剂中回收吸附材料的可行方法，研究解吸剂的可能再利用，并选择合适的用于特定应用的解吸/再生剂。