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

ABSTRACT

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.

KEYWORDS:

• Catalytic ozonation
• acid blue 113
• MOFs
• MIL-68 (Al)
• response surface methodology

Acknowledgments

The authors of this article are well aware of the need to thank Hamadan University of Medical Sciences for financial support and the use of laboratory facilities.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Hamadan University of Medical Sciences [9809056433].