Role of bentonite adsorbent sub-layer in the photocatalytic-adsorptive removal of methylene blue by the immobilized TiO2/bentonite system
作者： Y. S. Ngoh , M. A. Nawi
DOI: 10.1007/S13762-015-0928-5
关键词:
摘要: An immobilized clay composite (BEN–PVAG) on a glass plate (GP) was fabricated using bentonite powder (BEN) and glutaraldehyde cross-linked polyvinyl alcohol (PVAG) as the adsorbent adhesive, respectively. The characterized SEM, EDX, FTIR, BET analysis. adsorption capacity of BEN–PVAG examined methylene blue (MB) model pollutant. results indicated that MB onto obeyed pseudo-second-order kinetics. In addition, by controlled intra-particle diffusion. contrast, suspended dominated film then applied sub-layer for fabrication P-25TiO2/BEN–PVAG/GP bilayer system where P-25TiO2 deposited top layer. exhibited synergistic photocatalytic-adsorptive removal upon irradiation with light source, while experiment in dark yielded only process. rate 5.3 times faster than P-25TiO2. result implied positive impact photocatalyst. Most important, provided convenient reuse catalyst over time treated water could be directly discharged without need filtration.
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