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Heterogeneous photocatalytic degradation of isoproturon in aqueous solution: Experimental design and intermediate products analysis

Paper ID Volume ID Publish Year Pages File Format Full-Text
55033 47038 2013 9 PDF Available
Title
Heterogeneous photocatalytic degradation of isoproturon in aqueous solution: Experimental design and intermediate products analysis
Abstract

The photocatalytic degradation of the herbicide isoproturon (3-(4-isopropylphenyl)-1,1-dimethylurea) in aqueous solution has been investigated. The influence of pH, TiO2 loading and isoproturon concentration on the efficiency of the reaction has been studied by statistical design of experiments. Under optimal conditions (1.95 g L−1 TiO2 loading, pH 3.8 and 5 mg L−1 of isoproturon), 95% of the herbicide was removed within 20 min of irradiation.HPLC/MS/MS was used to identify and elucidate structural information of the main products formed during the photocatalytic reaction. According to the results obtained, a plausible mechanism for the formation of the different by-products has been proposed.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (236 K)Download as PowerPoint slideHighlights► The herbicide isoproturon has been degraded in aqueous solution using TiO2 as photocatalyst. ► The influence of pH, TiO2 and isoproturon concentrations has been studied by statistical design of experiments. ► The intermediates formed during the photocatalytic reaction have been identified by LC–MS-TOF. ► A mechanism of isoproturon photocatalytic degradation has been proposed according to the results from MS and MS2 spectra.

Keywords
Photocatalysis; Isoproturon; Design of experiments; LC/MS; Intermediates
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Heterogeneous photocatalytic degradation of isoproturon in aqueous solution: Experimental design and intermediate products analysis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 209, 15 June 2013, Pages 99–107
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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