Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14304
Title: Reactor design and kinetics study of 4,4′-dichlorobiphenyl photodecay in surfactant solution by using a photosensitizer and hydrogen source
Authors: Chu, W 
Kwan, CY
Keywords: PCBs
Sensitizer
Solvent
Surfactant
UV
Issue Date: 2003
Publisher: IWA Publishing
Source: Water research, 2003, v. 37, no. 10, p. 2442-2448 How to cite?
Journal: Water research 
Abstract: The system design based on the photodegradation kinetics of 4,4′-dichlorobiphenyl (4,4′-DCB) in surfactant solution with the aid of solvents (acetone and/or squalane) has been studied. Organic solvents acetone and squalane were added as a photosensitizer and a hydrogen source, respectively, to achieve better photolysis performance. The quantum yield of 4,4′-DCB photodecay in Tween 80 micellar solution in the presence of added acetone was increased from 0.032 to 0.043 at its optimal condition. Acetone was shown to be an effective photosensitizer at low concentration, but an overdose would quench the reaction. Furthermore, the addition of squalane could further promote the photodechlorination of 4,4′-DCB in the Tween 80/acetone solutions for an additional 59% of rate improvement. However, an overdose of either solvent was found to cause UV light attenuation and to reduce the observed quantum yield. This effect has been justified and quantified in this study by a proposed light attenuation model, which has also been incorporated into the kinetic equation so that the resulted formula can be used to design the UV reactors for water and wastewater treatment works.
URI: http://hdl.handle.net/10397/14304
ISSN: 0043-1354
EISSN: 1879-2448
DOI: 10.1016/S0043-1354(02)00635-8
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

7
Last Week
0
Last month
0
Citations as of Sep 11, 2017

WEB OF SCIENCETM
Citations

6
Last Week
0
Last month
0
Citations as of Sep 21, 2017

Page view(s)

33
Last Week
2
Last month
Checked on Sep 17, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.