Rapid Decolorization of Cobalamin
Joint Authors
Hussein, Falah H.
Halbus, Ahmed F.
Source
International Journal of Photoenergy
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-09-25
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The photocatalytic decolorization of cobalamin was carried out in aqueous solution of different types of catalysts including ZnO, TiO2 (Degussa P25), TiO2 (Hombikat UV100), TiO2 (Millennium PC105), and TiO2 (Koronose 2073) by using UVA source of irradiation.
The effect of various parameters such as photocatalyst amount, cobalamin concentration, type of catalyst, pH of aqueous solution, light intensity, addition of H2O2, flow rate of O2, type of current gas, and temperature on photocatalytic oxidation was investigated.
The results indicated that the photocatalytic decolorization of cobalamin was well described by pseudo-first-order kinetics according to the Langmuir-Hinshelwood model.
The effect of temperature on the efficiency of photodecolorization of cobalamin was also studied in the range 278–298 K.
The activation energy was calculated according to Arrhenius plot and was found equal to 28±1 kJ·mol−1 for ZnO and 22±1 kJ·mol−1 for TiO2 (Degussa P25).
The results of the total organic carbon (TOC) analysis indicate that the rate of decolorization of dye was faster than the total mineralization.
Decolorization and mineralization of cobalamin in the absence of light and/or catalyst were performed to demonstrate that the presence of light and catalyst is essential for the decolorization of this cobalamin.
The results show that the activity of different types of catalysts used in this study was of the sequence: ZnO > TiO2 (Degussa P25) > TiO2 (Hombikat UV100) > TiO2 (Millennium PC105) > TiO2 (Koronose 2073).
American Psychological Association (APA)
Hussein, Falah H.& Halbus, Ahmed F.. 2012. Rapid Decolorization of Cobalamin. International Journal of Photoenergy،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-476230
Modern Language Association (MLA)
Hussein, Falah H.& Halbus, Ahmed F.. Rapid Decolorization of Cobalamin. International Journal of Photoenergy No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-476230
American Medical Association (AMA)
Hussein, Falah H.& Halbus, Ahmed F.. Rapid Decolorization of Cobalamin. International Journal of Photoenergy. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-476230
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-476230