Batch and fixed-bed column adsorption of tetrabromobisphenol A onto metal organic resin: equilibrium, kinetic and mechanism studies

Abstract

Tetrabromobisphenol A (TBBPA) poses a serious threat to the environment and human health. Many advanced treatment systems have been introduced to address this problem. In this study, three kinds of metal organic resins (MORs; Cu-MOR, Cr-MOR and Zn-MOR) were successfully prepared by fabricating MOF materials and commercial resin. The resulting MOR composites retain the porous structures of the MOF materials and convenient features of commercial resin, making them potential adsorbents for column runs and industrial application. Cu-MOR and Cr-MOR showed a good adsorption capacity for TBBPA molecules. The uptake capacities were 24.68 and 26.58 mg g⁻¹, respectively. For the first time, the successful application of Cr-MOR in column experiments for TBBPA removal was demonstrated. FT-IR and XPS analysis verified the adsorption of TBBPA onto the MOR and provided useful results for the removal mechanism. Pore filling, π–π interactions, hydrogen bonding and electrostatic interactions were examined to reveal the adsorption mechanism. In summary, this study extends the practical application of MOF materials in environmental treatment and demonstrates the good affinity of MORs for low concentrations of TBBPA in contaminated water.