Work

Biodecolorization and Biodegradation of Methyl Orange by Immobilized Pseudomonas aeruginosa Bacterium into SA/PVA Matrix Integrated with MOF UiO-66 Adsorbent

Year: 2025

Type: article

Abstract: (PA) and UiO-66, a zirconium-based metal-organic framework (MOF), into sodium alginate/polyvinyl alcohol (SA/PVA) matrix for biodecolorization and biodegradation of MO dye. Material characterization was carried out by using X-ray diffraction (XRD), Fourier-transform infrared (FTIR), and scanning electron microscopy-energy dispersive X-ray (SEM-EDX) which showed the successful formation of UiO-66 and stable incorporation in SA/PVA/PA beads. The results of adsorption experiments showed that the presence of UiO-66 enhanced MO adsorption capacity by 20.47 % compared to SA/PVA/PA matrix without UiO-66. Kinetic analysis followed the pseudo-second-order model, and adsorption isotherm was best described by the Langmuir model, showing monolayer adsorption behavior. Furthermore, biodecolorization results showed that SA/PVA/UiO-66/PA beads achieved a 92.03 % MO removal rate, indicating a 33.99 % higher than free PA cells. Liquid chromatography-mass spectrometry (LC-MS) analysis confirmed the formation of nine biodegradation products, suggesting successful structural breakdown of MO. These results showed that combining UiO-66 with immobilized PA significantly enhanced both adsorption and biodegradation performance toward MO treatment.

Source: Biotechnology Reports

DOI: 10.1016/j.btre.2025.e00924