Photo-Fenton decomposition of chlorfenvinphos: Determination of reaction pathway

Klamerth, Nikolaus, Gernjak, Wolfgang, Malato, Sixto, Aguera, Ana and Lendl, Bernhard (2009) Photo-Fenton decomposition of chlorfenvinphos: Determination of reaction pathway. Water Research, 43 2: 441-449. doi:10.1016/j.watres.2008.10.013


Author Klamerth, Nikolaus
Gernjak, Wolfgang
Malato, Sixto
Aguera, Ana
Lendl, Bernhard
Title Photo-Fenton decomposition of chlorfenvinphos: Determination of reaction pathway
Journal name Water Research   Check publisher's open access policy
ISSN 0043-1354
Publication date 2009-02
Year available 2008
Sub-type Article (original research)
DOI 10.1016/j.watres.2008.10.013
Volume 43
Issue 2
Start page 441
End page 449
Total pages 9
Editor David Dixon
Jean-Claude Block
Mogens Henze
Place of publication Oxford, England
Publisher Pergamon-Elsevier Science
Language eng
Subject C1
Formatted abstract
The purpose of this work was to determine the degradation products and pathway of chlorfenvinphos (CFVP) in water treated by photo-Fenton driven by solar irradiation, as well as to develop an analytical procedure for the degradation experiments. Degradation products and pathway were determined in a laboratory experimental setup. Routine water sample analysis was done by standard laboratory wet chemistry procedures and the use of laboratory equipment such as HPLC–UV and ionic chromatography (IC). Solid-phase extraction (SPE) was used to extract analytes from an aqueous matrix, and GC–MS was used to identify intermediate degradation products. The use of an HPLC–TOF-MS provided more results on degradation products and more insight was gained into how degradation takes place. In all experiments, strong mineralisation and degradation of CFVP was observed. CFVP and its degradation products, like 2,4-dichlorophenol, 2,4-dichlorobenzoic acid and triethylphosphate were decomposed into organic substances like acetate, formate, maleate, and inorganic ions like chloride and phosphate, within the detection limits (12.5 μg/L for CFVP in the GC–MS and 40 μg/L in HPLC–UV) of the equipment used. In fact, Cl emerges in nearly stoichiometric concentrations and PO43− is precipitated as FePO4. The remarkably complete absence of chlorinated aliphatic substances and chlorinated acids leads to the conclusion that chlorine is removed very quickly, and that residual DOC does not correspond to any chlorinated compound.
Keyword Chlorfenvinphos
Degradation pathway
Photo-Fenton
Solar photocatalysis
Advanced oxidation processes
EU priority substances
Photocatalytic degradation
Pesticides
water
Biodegradability
Contaminants
Radicals
Light
TIO2
Q-Index Code C1
Q-Index Status Provisional Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: Advanced Water Management Centre Publications
Excellence in Research Australia (ERA) - Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 17 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 17 Nov 2009, 10:01:03 EST