Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14402
Title: Transformation of 2,4-dichlorophenoxyethanoic acid (2,4-D) by a photoassisted ferrous oxalate/H2O2 system
Authors: Kwan, CY
Chu, W 
Keywords: 2,4-dichlorophenoxyethanoic acid
AOPs
Ferrous oxalate
Photodegradation
Issue Date: 2004
Source: Journal of chemical technology and biotechnology, 2004, v. 79, no. 6, p. 663-669 How to cite?
Journal: Journal of Chemical Technology and Biotechnology 
Abstract: The kinetics of the dependence of pH, oxalate, and hydrogen peroxide concentrations on the degradation performance of the herbicide 2,4-dichlorophenoxyethanoic acid (2,4-D) was studied in a novel ferrous oxalate/H2O2/UV system. The formation and destruction of the primary intermediate, 2,4-dichlorophenol (2,4-DCP), was also monitored in the study. A rate enhancement of about 2.9 times was found when 1.2 mM of oxalate was added to the conventional Fe2+ /H2O2/UV process. However, excess oxalate suppressed the reaction due to the scavenging and light attenuation effects. The 2,4-D transformation at a lower initial pH was faster than that at a higher pH, and the different reaction mechanisms were investigated. In addition to the decay rates, the yield of the intermediate 2,4-DCP was also affected by the initial solution pH. The increment of hydrogen peroxide concentration did not increase the initial decay rates of 2,4-D, yet it improved the overall removal of 2,4-D and elevated the formation of the corresponding intermediate (2,4-DCP).
URI: http://hdl.handle.net/10397/14402
ISSN: 0268-2575
DOI: 10.1002/jctb.1048
Appears in Collections:Journal/Magazine Article

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

SCOPUSTM   
Citations

3
Last Week
0
Last month
0
Citations as of Aug 11, 2017

WEB OF SCIENCETM
Citations

2
Last Week
0
Last month
0
Citations as of Aug 15, 2017

Page view(s)

33
Last Week
5
Last month
Checked on Aug 14, 2017

Google ScholarTM

Check

Altmetric



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