Parametric Study on the Photocatalytic Decolorization of Synthetic Melanoidin using Parabolic Trough Solar Concentrator

Author : Relucio, Gilbert Coper
Major Adviser : Bautista, Ramer P.
Committee Members : Migo, Veronica P.; Sanchez, Denise Ester S.
Year : 2018
Month : June
Type : Thesis
Degree: BS
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This study investigated the effects of varying concentration of melanoidin, catalyst loading and initial pH on the percent decolorization of synthetic melanoidin prepared from glucose-glycine system using parabolic trough solar concentrator. The maximum and minimum color reduction obtained was 68.92% and 26.40% respectively. It was found out that all the parameters have a significant effect on percent decolorization. An increase in melanoidin concentration would give a decrease in percent decolorization due to blockage of sunlight. Increasing pH would give an increase in color reduction because of more interaction between contaminant and catalyst while increasing catalyst loading will increase the color reduction because of more active site for the photoreaction. In the analysis of interaction effects, only catalyst loading – initial pH interaction had a significant effect on decolorization. A high catalyst loading at low pH would give a high percent decolorization. The initial pH has the highest effect on decolorization followed by catalyst loading, melanoidin concentration and catalyst loading – initial pH interaction. A control experiment for pH and adsorption of TiO₂ were also done. Adsorption of TiO₂ obtained a 20.12% color reduction while a maximum of 27.42% color reduction was observed for control for pH. Although we obtained the highest of 68.92% color reduction in this study it is not as competitive as with other AOP. Thus, further studies should be done that focus on optimizing the parameters.

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