Cellulose-based beads for the adsorptive removal of wastewater effluents: a review

Wastewater pollution is a major issue requiring advanced treatment methods such as nanotechnologies. In particular, nanocelluloses appear promising as adsorbents due to their elevated surface area, which can be functionalized. Here we review cellulose-based beads with focus on preparation, properties, kinetics, adsorption isotherm modeling and application for wastewater treatment, especially for the removal of metal ions and dyes. Preparation of cellulose-based beads is mainly done by the ionotropic gelation method. High adsorption capacities up to 568.62 mg g(-1) for heavy metal ions and 1550.55 mg g(-1) for dyes have been reported. We also discuss the regeneration capability of cellulose-based beads.

Automated summary

Wastewater pollution is a significant issue that requires advanced treatment methods, such as nanotechnologies. Nanocelluloses, in particular, show promise as adsorbents due to their high surface area and ability to be functionalized. This review focuses on cellulose-based beads and covers their preparation, properties, kinetics, adsorption isotherm modeling, and application in wastewater treatment, specifically for removing metal ions and dyes.