Parametric Study on the Adsorption of Methyl Orange on Polyaniline-Coated Corn Stover Biomass

Author : Hachac, Rea Basquiña
Major Adviser : Capunitan, Jewel A.
Major Co-Adviser : Herrera, Marvin U.
Committee Members : Carpio, Rowena B.; Migo, Veronica P.
Year : 2020
Month : July
Type : Thesis
Degree: BS
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The adsorption of methyl orange dye using polyaniline-coated corn stover biomass was evaluated through a parametric study. Corn stover biomass was coated with polyaniline using successive ionic layer adsorption and reaction (SILAR) method. The effects of pH, adsorbent loading, and initial dye concentration were investigated using a 23 factorial experiment in a batch adsorption. With 120 minutes equilibrium time, results showed that adsorbent loading, initial dye concentration, adsorbent loading-initial dye concentration interaction, and pH-initial dye concentration interaction significantly affected the percent methyl orange removal. At low initial dye concentration, percent removal decreased as adsorbent loading increased due to the aggregation of adsorbent particles in close contact that enhances the difficulty of the dye particles to adhere. At high initial dye concentration, percent removal increased with increasing adsorbent loading due to the increase in available active sites and surface area. At low initial dye concentration, percent removal was higher at decreasing pH due to the positive surface caused by the H+ ions increasing the attraction with the anionic methyl orange particles. The highest percent removal was 99.79% achieved at pH 9 with 1 mg/L adsorbent loading and 10 mg/L dye concentration. With the high percent removal, it can be concluded that polyaniline-coated corn stover biomass is an efficient adsorbent for methyl orange.

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