Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

The quality of water is continuously under threat as increasing concentrations pollutants escape into the aquatic environment. However, these issues can be alleviated by adsorbing onto adsorbents. Chitosan and its composites are attracting considerable interest environmentally acceptable adsorbents have potential to remove many contaminants. In this review development chitosan-based described discussed. Following a short introduction extraction chitin from seafood wastes, followed conversion chitosan, properties chitosan described. Then, emerging chitosan/carbon-based materials, including magnetic combined with graphene oxide, carbon nanotubes, biochar, activated also chitosan-silica introduced. applications materials in removal various heavy metal ions, Cr(VI), Pb(II), Cd(II), Cu(II), different cationic anionic dyes, phenol other organic molecules, such antibiotics, reviewed, compared Adsorption isotherms adsorption kinetics then highlighted details on mechanisms role or silica supports. Based reviewed papers, it clear, that while some challenges remain, promising