Parametric Study on Photocatalytic Decolorization of Synthetic Melanoidin Using a Parabolic Dish Solar Concentrator
Author : Pagdanganan, Kenneth R.
Major Adviser : Movillion, Jovita L.
Committee Members : Valencia, Jeanne Michelle T.; Laurio, Michael Vincent O.
Year : 2015
Month : November
Type : Thesis
Degree: BS
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Abstract
Synthetic melanoidin was produced from glucose-glycine system and was decolorized using titanium dioxide photocatalytic oxidation. The study was conducted by varying the pH, melanoidin concentration, catalyst dosage and solar concentration. Of the four parameters, the pH and melanoidin concentration had significant effects on decolorization according to two-way analysis of variance. At low pH, percent decolorization increases due to dominant attractive forces. At low melanoidin concentration, percent decolorization also increases due to increased solar light irradiation. Moreover, in the analysis of interaction effects, only the catalyst dosage – melanoidin concentration interaction had significant effect on decolorization. A high catalyst loading and low contaminant loading would give high percent decolorization. Separate control experiments were also conducted: adsorption by titanium dioxide and photolysis. The maximum percent decolorization obtained through adsorption of titanium dioxide was 17.18%, while the maximum percent decolorization obtained through photolysis was 1.05%.
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