| Abstract:Lignin is a renewable natural aromatic polymer, and its active groups on the molecular structure make it an excellent green adsorbent for adsorbing heavy metal ions, wastewater pollutants, gases and organic matter. In this paper, the structural characteristics and application of lignin are summarized. Secondly, the extraction and separation methods of lignin were reviewed, and the modification of lignin and the preparation of adsorption materials were summarized. Finally, the main application fields of lignin-based adsorption materials are summarized, and the future direction of efforts is looked forward to on this basis. |