A regenerated adsorbent by ultraviolet irradiation based on viscose fiber cloth/Cu–BTEC MOFs for methylene blue adsorption

To recover dyes and reuse adsorbents in the process of dye wastewater treatment, a new composite adsorbent based on viscose fiber cloth and Cu–BTEC MOFs was designed. The MOF materials were evenly distributed on the fiber surface via an in situ hot pressing process. The adsorbent could effectively adsorb methylene blue as the model dye in the solution, and the adsorption efficiency could reach 84% in 4 h. When the adsorbent is spent after several adsorption cycles, it could be recovered to a higher adsorption efficiency by UV catalytic regeneration. Hence, the explored material should be applicable in the field of wastewater treatment. Graphic abstract