Facilely constructing physical-linked γ-Fe2O3/CeO2/cellulose nanofibril films for highly effective, recyclable, and multi-removal of heavy metals and dyes from wastewater

The problems of heavy metal and dye contamination in wastewater urgently requires green, efficient, and convenient removal strategy. In this paper, a new type of γ-Fe 2 O 3 /CeO 2 /cellulose nanofibril (CNF) composite film (CNFMONP film) adsorbent based on nanocellulose was facilely prepared which is green, easy to be recycled, and has high-efficiency adsorption performance. The proposed CNFMONP films exhibited rough surface, excellent mechanical properties, and stability performance, as well as satisfying adsorption removal performance for Pb 2+ and Cu 2+ , with removal rates of 77.9% and 69.6%, respectively. In addition, a removal rate of up to 95.4% for the dye methylene blue (MB) was also achieved under UV illumination. The adsorption kinetics showed that the CNFMONP films were mainly chemisorbed for heavy metals. Besides, isotherm analysis indicated that monolayer adsorption is the adsorption behavior of the proposed film types adsorbent for heavy metals and dyes. Furthermore, the CNFMONP films still have excellent adsorption affinity after five rounds of cycles, with high adsorption efficiency of 75.0% for Pb 2+ in complex environment. Therefore, environmentally friendly CNFMONP films with excellent stabilization and adsorption properties were simply prepared, which may provide a highly efficient way for recyclable and multi adsorption of heavy metals and dyes.