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Title of Article Methylene Blue Removal From Aqueous Solution by Manganese Octahedral Molecular Sieve (K-OMS2) Coated on Activated Alumina Ball  
Date of Acceptance 28 April 2020 
Journal
     Title of Journal KKU Research Journal (Graduate Studies) 
     Standard TCI 
     Institute of Journal Graduate School, Khon Kaen University. 
     ISBN/ISSN E-ISSN 2672-9636 
     Volume 21 
     Issue
     Month January to March
     Year of Publication 2020 
     Page  
     Abstract Manganese octahedral molecular sieve (K-OMS2) coated on activated alumina ball (Al2O3) can improve the surface with polyvinyl alcohol (PVA) binder for removal of methylene blue (MB). K-OMS2 powder was synthesized by the hydrothermal method followed by coating onto the activated alumina ball (K-OMS2/Al2O3-PVA). The K-OMS2 / Al2O3-PVA was characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Point of zero charges (pHpzc), and Nitrogen adsorption-desorption. The results showed that K-OMS2 had a cryptomelane crystalline structure with fracturing of the K-OMS2 particle on K-OMS2/Al2O3-PVA and pHpzc ≈ 8. The specific surface area was 212.65 m2/g, 0.45 cm3/g of the pore volume, while pore size was 4.19 nm. The kinetics study of MB removal showed the reaction rate increased as temperature increased in the range of the temperature investigated (303 – 333 K), which expressed the pseudo-second-order kinetic model. For the thermodynamic study, the reaction involves spontaneous reactions (-ΔG°), in an endothermic nature (+ΔH°), and with increased randomness (+ΔS°). 
     Keyword K-OMS2, Methylene blue, PVA 
Author
615040020-1 Miss PONGNAPA POOMPANG [Main Author]
Engineering Master's Degree
615040019-6 Miss THITISUDA JARICHANON
Engineering Master's Degree
607040037-7 Mr. JAKKAPOP PHANTHASRI
Engineering Doctoral Degree
577040021-9 Miss BHUCKCHANYA PANGKUMHANG
Engineering Doctoral Degree

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citation true 
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