Ca-alginate immobilized Tio2 beads for Methylene blue degradation

• Main Author: Naimmatul Umirah, Binti Abdul Razak
• Format: E-LPTA
• Language: English
• Published: Universiti Malaysia Sarawak (UNIMAS) 2015
• Subjects: Q Science (General); QD Chemistry
• Online Access: http://ir.unimas.my/id/eprint/25712/1/Ca-alginate%20Immobilized%20Tio2%20Beads%20for%20Methylene%20Blue%20Degradation%20%28fulltext%29.pdf; http://ir.unimas.my/id/eprint/25712/

This study focuses on titanium dioxide (TiD2) immobilization on a support, alginate to provide a much easier way for photocatalyst recovery after treatment operations, In this study, methylene blue (MB) was selected as the model dye and TiD2 was immobilized by entrapment in calcium alginate (Ca-alginate) beads. Ca-alginate! TiD2 beads were prepared by varying the preparation conditions and characterized by using Scarming Electron Microscopy (SEM) for its morphology. The photocatalytic activity was measured based on MB degradation, Higher TiD2 concentrations were accompanied by higher degradation efficiency when the MB solution was analysed by using Ultraviolet-visible (UV-Vis) spectrophotometer. However, an increment in the MB concentrations resulted in lower degradation efficiency. Experiments by using recycled beads revealed the potential of using Ti~1 Ca-alginate beads for multiple treatments which can be regarded as cost effective and environmentally friendly catalyst.