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Current Environmental Engineering
ISSN (Print): 2212-7178
ISSN (Online): 2212-7186
VOLUME: 1
ISSUE: 1
DOI: 10.2174/2212717801999140415152854









Response Surface Methodology Applied for Phenol Photocatalytic Degradation in TiO2-P25/Activated Carbon

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Author(s): Sze-Mun Lam, Jin-Chung Sin and Abdul R. Mohamed
Pages 17-22 (6)
Abstract:
Degussa P25 powder embedded and TiO2 immobilized on activated carbon (TiO2-P25/AC) was used for photocatalytic degradation of phenol. The effects of TiO2-P25 loading, solution pH and initial phenol concentration were investigated using response surface methodology (RSM) based on central composite design (CCD). By applying the quadratic regression analysis, the polynomial expression describing the process efficiency as simultaneous functions of the selected independent variables was developed. Accordingly, the optimum condition was found as follows: TiO2-P25 loading=2 layers, solution pH=5 and initial phenol concentration=25 mg/L. Degradation efficiency of phenol of at least 99.1% was obtained experimentally under such optimal conditions, which was highly agreed with that 98.9% estimated by the equations.
Keywords:
TiO2, activated carbon, phenol, photocatalysis, response surface methodology, central composite design.
Affiliation:
School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Pulau Pinang, Malaysia.