Removal of methylene blue using photoactivated titanium dioxide immobilized on granular activated carbon

Sin, Jin Chung (2007) Removal of methylene blue using photoactivated titanium dioxide immobilized on granular activated carbon. Universiti Malaysia Sabah. (Unpublished)

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Abstract

Removal of Methylene Blue (MB) in aqueous solution by TiO2 immobilized on granular activated carbon (GAC) had been investigated. TiO2/GAC granular was prepared through hydroxide precipitation of TiO2 from titanium tetraisopropoxide followed by heat treatment. The photocatalytic removal was carried out by using different layers of TiO2 immobilized on GAC suspended in this solution. As compared with bare TiO2 and bare GAC, TiO2/GAC showed a higher efficiency in removing the MB. In the TiO2/GAC system, it was found that higher layers of TiO2 coated on GAC will lower the degree of MB removal. In contrast, the best experimental combination was 2-layered TiO2/GAC with the existence of UV irradiation where 72% of the MB in aqueous solution was successfully removed. The kinetics of photocatalytic MB removal was found to follow a pseudo first order rate law with a rate constant, k of 0.0104 min-1.

Item Type: Academic Exercise
Uncontrolled Keywords: photocatalytic, Methylene Blue (MB), Granular Activated Carbon (GAC), titanium tetraisopropxide, immobilization
Subjects: Q Science > QD Chemistry
Divisions: SCHOOL > School of Science and Technology
Depositing User: MDM SITI AZIZAH IDRIS
Date Deposited: 27 Jun 2013 04:01
Last Modified: 23 Oct 2017 06:23
URI: http://eprints.ums.edu.my/id/eprint/6424

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