Effective Photodegradation of Methyl Orange Using Fluidized Bed Reactor Loaded with Cross-Linked Chitosan Embedded Nano-CdS Photocatalyst
Joint Authors
Szeto, Wai
Chan, Shun-Wan
Yuen, C. W. M.
Kan, Chi Wai
Lam, Kim Hung
Source
International Journal of Chemical Engineering
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-08-05
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
Chitosan-based photocatalyst composites containing CdS nanocrystals with and without glutaraldehyde or epichlorohydrin cross-linking treatments were investigated and the catalyzed photodegradation of methyl orange in aqueous solution was examined.
In addition, the effects of catalyst dosage, initial dye concentration, and initial pH of the dye solution on the photodegradation kinetics were investigated.
In this study, the effect of initial solution pH was more important than other factors.
The photocatalyst composite could remove 99% dye in 80 minutes at pH 4.
The catalyst composite was characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), fourier transform infrared (FT-IR), and visible reflectance spectroscopy.
The dye removal mechanism of methyl orange involved an initial sorption process followed by photodegradation.
The sorption process underwent the pseudo-second order kinetics, while photodegradation followed the Langmuir-Hinshelwood kinetics.
Although the glutaraldehyde cross-linked chitosan enhanced the initial dye sorption, the epichlorohydrin cross-linked catalyst composite demonstrated a better overall dye removal performance, especially in the photodegradation step.
Both chitosan encapsulated catalyst with and without epichlorohydrin cross-linking demonstrated the same pseudo-first order photodegradation kinetic constant of 0.026 min−1 and the same dye removal capacity.
The catalyst composite could be reused but the photocatalytic activity dropped successively in each cycle.
American Psychological Association (APA)
Szeto, Wai& Kan, Chi Wai& Yuen, C. W. M.& Chan, Shun-Wan& Lam, Kim Hung. 2014. Effective Photodegradation of Methyl Orange Using Fluidized Bed Reactor Loaded with Cross-Linked Chitosan Embedded Nano-CdS Photocatalyst. International Journal of Chemical Engineering،Vol. 2014, no. 2014, pp.1-16.
https://search.emarefa.net/detail/BIM-459160
Modern Language Association (MLA)
Szeto, Wai…[et al.]. Effective Photodegradation of Methyl Orange Using Fluidized Bed Reactor Loaded with Cross-Linked Chitosan Embedded Nano-CdS Photocatalyst. International Journal of Chemical Engineering No. 2014 (2014), pp.1-16.
https://search.emarefa.net/detail/BIM-459160
American Medical Association (AMA)
Szeto, Wai& Kan, Chi Wai& Yuen, C. W. M.& Chan, Shun-Wan& Lam, Kim Hung. Effective Photodegradation of Methyl Orange Using Fluidized Bed Reactor Loaded with Cross-Linked Chitosan Embedded Nano-CdS Photocatalyst. International Journal of Chemical Engineering. 2014. Vol. 2014, no. 2014, pp.1-16.
https://search.emarefa.net/detail/BIM-459160
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-459160