Synthesis and Application of Magnesium-Based Nanoparticles for the Photocatalytic Degradation of Methylene Blue in Aqueous Solutions: Optimization and Kinetic Modeling

Engineering Proceedings

article

Khumbolake Faith Ngulube¹  Mahmoud Nasr¹  Manabu Fujii³  Amal Abdelhaleem¹ 

[1] Environmental Engineering Department, Egypt-Japan University of Science and Technology;Sanitary Engineering Department, Faculty of Engineering, Alexandria University;Department of Civil and Environmental Engineering, Tokyo Institute of Technology

关键词: magnesium oxide;    methylene blue dye;    photocatalytic degradation;    optimization;    reaction kinetics;    operating costs;   

DOI  :  10.3390/ECP2023-14636

来源: mdpi

【 摘 要 】

Heterogeneous photocatalysis has been studied with various semiconductor materials for the efficient degradation of various water pollutants; however, there is the challenge of wide-bandgap photocatalyst materials, which limits their application under visible-light irradiation. Herein, a [email protected] core–shell nanocomposite was synthesized using co-precipitation and applied to the photocatalytic degradation of MB dye under visible-light irradiation. MB degradation was optimized using the response surface methodology, resulting in 95.948% and ≈91% predicted and actual MB removals, respectively, at a 10 mg/L MB concentration, 1000 mg/L catalyst dose, pH 10, and time of 115.7 min. The degradation kinetics were studied, and it was found that the degradation followed pseudo-first-order kinetics with a rate constant of k = 0.07593 min−1. A cost–benefit analysis was undertaken, and the operating costs were estimated based on the optimized conditions at $7.6/m3 with a payback period of 3.2 years.

【 授权许可】

Unknown