Water scarcity is a worldwide concern with various implications, such as water pollution, resulting in global threats to the environment and human health. One of the most challenging problems for wastewater treatment is its severe contamination with micropollutants such as dyes which cannot be completely removed by the current treatment methods. This study investigates the role of metal–organic framework (MOF) doped biopolymer beads (MIL-88B@SA) as a potential sorbent for methylene blue (MB) removal. The structure, morphology, and stability of the MIL-88B@SA were characterized through a series of techniques. The performance of MIL-88B@SA on the MB removal efficiency was studied through batch adsorption and column filtration experiments. Batch adsorption studies indicated removal efficiency of more than 90 % by various adsorption mechanisms like electrostatic interactions (π–π stacking and H-bonding). The adsorption kinetics presented very well-fitted pseudo-first-order and the equilibrium isotherm is consistent with the Langmuir model. In addition, thermodynamic studies showed dye molecule removal is spontaneous and thermodynamically applicable for the entire temperature range. Also, the dynamics adsorption behavior of MIL-88B@SA was also studied by passing MB through a fixed-bed column representing this sorbent has potential for the treatment of micropollutant-containing wastewater in actual sewage and large-scale.

Keywords