A novel porous amino-functionalized cellulose composite for highly efficient adsorption of anionic pollutant in water: behavior and mechanism

Abstract A large amount of domestic and industrial wastewater can pose a great threat to our environment. Thus, searching effective and eco-friendly ways for adsorbing and removing toxic substances (Cr6+, Mn7+, and methyl orange (MO)) in wastewater is urgent and highly desirable. An efficient, mesoporous, and amino-functionalized polydivinylbenzene (PDVB)-cellulose nanocrystal (CNC/PDVB-NH2) with high stability and super-hydrophobicity was developed by crosslinking in this study. The pseudo-second-order model and Langmuir model expressed the adsorption kinetics and isotherm well, indicating the adsorption of Cr6+ and Mn7+ ions on CNC/PDVB-NH2 was monolayer chemisorption. The maximum adsorption amount (qm) of Cr6+ and Mn7+ ions on CNC/PDVB-NH2 was 130.39 mg/g and 308.94 mg/g, respectively. For negatively charged dye methyl orange (MO) also maintain adsorption effect. These results indicated the CNC/PDVB-NH2 can be used as an efficient and reliable absorbent for wastewater treatment, which was worthy of promotion for large-scale application.