Abstract:
In this study, a novel, low-cost, and efficient adsorbent film was fabricated by a solvothermal method. The adsorbent
film was developed to be hydrolytically stable, not vulnerable to aggregation in aqueous environments, and not prone to secondary
contamination. The adsorbent consists of cellulose acetate (CA) as a support embedded with a MOF-5/crystalline nanocellulose
(CNC) composite material. The CA-supported MOF-5/CNC film was characterized using a variety of techniques, including X-ray
diffraction, thermal gravimetric analysis, scanning electron microscopy, X-ray photoelectron spectroscopy, and Fourier transform
infrared spectroscopy, which revealed hydroxyl and carbonyl functional groups on the adsorbent film. The film was evaluated for the
adsorptive removal of methylene blue (MB) from an aqueous solution. Adsorption was characterized by a rapid increase in MB
adsorption during the first hour with equilibrium achieved within 4−5 h into the adsorption process. The maximum adsorption
capacity was determined to be 4.29 mg/g and the maximum dye removal efficiency was 77%. The MB adsorption process best fitted
the Freundlich isotherm and pseudo-second-order kinetic models. Thermodynamic studies showed that the adsorption was
exothermic and feasible. The adsorbent film showed admirable regeneration ability, demonstrating its cost-effectiveness and its
potential as a promising material for wastewater treatment.
