Design, Fabrication and Performance Evaluation of a Photocatalytic Reactor Using Immobilized TiO2 on the Removal of Oxytetracycline in Water

Author : Guinid, Aljebr Pascual
Major Adviser : Bautista, Ramer P.
Committee Members : Dizon, Lisa Stephanie H.; Migo, Veronica P.
Year : 2019
Month : June
Type : Thesis
Degree: BS
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Performance evaluation of a designed and fabricated photocatalytic reactor was conducted for the removal of oxytetracycline (OTC) in water. Titanium dioxide was deposited onto aluminum sheets through spray pyrolysis. Characterization via spectrophotometry showed the wavelength of peak absorbance was at 369.6 nm. A 2k factorial design of experiment was used to determine the effects of varying the initial OTC concentration, initial pH and number of TiO2 coatings on the removal of OTC in water. ANOVA showed that the individual parameters initial pH and number of TiO2 coatings as well as the interaction between initial OTC concentration and number of TiO2 coatings have significant effects on the removal of OTC. Experimental runs showed that the highest average percentage removal of OTC was 23.78% under the following conditions: 5ppm initial OTC concentration, 8 initial pH and 5 number of coatings. The contributions of adsorption (on aluminum and on aluminium-coated with TiO2) and photolysis on the photocatalysis of OTC were also studied. It was determined that the photolysis process has the highest contribution on the removal of OTC and contributed 73.00% on 20.20% overall photocatalytic removal. Kinetics study was done at the condition that showed the highest average percent OTC removal. Integral method showed the kinetics of OTC followed 3rd order for both integral and differential method. The computed kinetic constants reflected a value of 0.0002 ppm-2 min-1.

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