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Parametric Study on Photocatalytic Decolorization of Rhodamine B Dye Solution

Author : Obias, Dominick Brazal
Major Adviser : Bambase Jr., Manolito E. 
Committee Members : Bautista, Ramer P.; Del Barrio, Marilyn C. 
Year : 2013
Month : October
Type : Thesis
Degree: BS
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Abstract

Rhodamines B dye solutions were decolorized photocatalytically using titanium dioxide (TiO₂). The effect of six parameters – initial dye concentration (100 ppm and 1000 ppm), catalyst loading (0.5 g/L and 1 g/L), pH (6.0 and 9.0), temperature (ambient temperature and 55 °C), light source (white light and ultraviolet (UV) light) and exposure time (30 min and 60 min) – was investigated using a 2ᵏ full factorial design of experiment. The highest percent decolorization attained was 34.31% at an initial dye concentration of 100 ppm, pH 6.0, catalyst loading of 1 g/L, and temperature of 55 °C using UV light as a source with an exposure time of 60 min. Based on analysis of variance, the significant factors found were initial dye concentration, catalyst loading, pH, temperature, and light source. Among these five significant factors, initial dye concentration was found to have the largest influence on the color reduction of Rhodamine B.

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