Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14063
Title: The photodegradation and modeling of a typical NAPL, trichloroethene, by monochromatic UV irradiations
Authors: Chu, W 
Jia, J
Issue Date: 2009
Publisher: American Chemical Society
Source: Environmental science & technology, 2009, v. 43, no. 5, p. 1455-1459 How to cite?
Journal: Environmental science & technology 
Abstract: In this study, the photodegradation of a typical nonaqueous phase liquid (NAPL)-trichloroethene (TCE) by ultraviolet irradiation was investigated. The decay of NAPL-TCE was studied in a RPR-200 Rayonet photochemical reactor, at three different monochromatic UV lamps (254, 300, and 350 nm). Among the three UV wavelengths used, the highest photodecay rate was obtained at 254 nm. The effect of the initial NAPL dosage was also analyzed to determine the photodecay of NAPL-TCE in batch experiments by ultraviolet irradiation at preselected wavelengths. The direct photolysis of NAPL-TCE followed two-stage pseudo first-order decay kinetics. The photodegradation rates of TCE were found to decrease with the increment of NAPL dosage. It is interesting to find that the NAPL dosage is critical to determine the process performance due to the NAPL size or cage effect, which will control the diffusion of TCE/ intermediates between NAPL and aqueous phases and therefore the overall reaction rates. Mathematical models were developed for the prediction of the two-stage photodeg-radation, in which the remaining fraction of TCE (C/C 0) in the system becomes predictable.
URI: http://hdl.handle.net/10397/14063
ISSN: 0013-936X
EISSN: 1520-5851
DOI: 10.1021/es802640q
Appears in Collections:Journal/Magazine Article

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

SCOPUSTM   
Citations

9
Last Week
0
Last month
0
Citations as of Sep 19, 2017

WEB OF SCIENCETM
Citations

8
Last Week
0
Last month
0
Citations as of Sep 21, 2017

Page view(s)

32
Last Week
1
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.