Characterisation, modeling, and optimisation of acid blue 113 dye degradation from aqueous media via catalytic ozonation using NH2-modified MIL-68 (Al) composite nano sorbent

The present study employed an NH2-MIL-68 (Al) composite for investigating the efficiency of the catalytic ozonation process for degradation of acid blue 113 dye (AB113) from an aqueous media. A facile one-step solvothermal method was used to synthesise NH2-MIL-68 (Al). The effect of varied operational parameters such as pH (3–11), initial dye concentration (20–100 mg/L), catalyst dosage (0.4–2 g/L), and contact time (12–36 min) was optimised via the use of a central composite design (CCD) through response surface methodology (RSM). The results of the study indicated that the highest degradation of the dye was 79.9% at pH (9), initial dye concentration (20 mg/L), catalyst dosage (2 g/L), and contact time (36 min). Additionally, the reusability experiments showed that the efficiency of the process was above 85% after 5 consecutive times of NH2 -MIL-68 (Al) reuse. This research has conclusively highlighted that MIL-68 is a promising potential candidate to remove organic dyes from water and wastewater.