Photolytic and photocatalytic decomposition of fenitrothion by PW 12O403- and TiO2: A comparative study

Kormali, P; Dimoticali, D; Tsipi, D; Hiskia, A; Papaconstantinou, E

dc.contributor.author	Kormali, P	en
dc.contributor.author	Dimoticali, D	en
dc.contributor.author	Tsipi, D	en
dc.contributor.author	Hiskia, A	en
dc.contributor.author	Papaconstantinou, E	en
dc.date.accessioned	2014-03-01T01:21:14Z
dc.date.available	2014-03-01T01:21:14Z
dc.date.issued	2004	en
dc.identifier.issn	09263373	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16147
dc.subject	Fenitrothion	en
dc.subject	Organophosphorous incecticides	en
dc.subject	Photocatalysis	en
dc.subject	Photodegradation	en
dc.subject	Polyoxometallates	en
dc.subject.other	Catalysts	en
dc.subject.other	Gas chromatography	en
dc.subject.other	High performance liquid chromatography	en
dc.subject.other	Mass spectrometry	en
dc.subject.other	Organometallics	en
dc.subject.other	Photodegradation	en
dc.subject.other	Photolysis	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Solutions	en
dc.subject.other	Titanium dioxide	en
dc.subject.other	Mineralization	en
dc.subject.other	Photocatalysts	en
dc.subject.other	Photocatalysis	en
dc.title	Photolytic and photocatalytic decomposition of fenitrothion by PW 12O403- and TiO2: A comparative study	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.apcatb.2003.10.002	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.apcatb.2003.10.002	en
heal.publicationDate	2004	en
heal.abstract	The photocatalytic degradation of fenitrothion under UV and near visible light in the presence of polyoxometallate (POM) photocatalyst PW 12O403-, in aqueous solutions has been studied and compared with the photodegradation by TiO2 suspensions. Fenitrothion is effectively degraded in the presence of both photocatalysts following pseudo first order kinetics. Complete mineralization of fenitrothion is achieved using both photocatalysts, leading to the formation of CO 2 and inorganic ions (PO43-, SO 42-, NO2-, and NO3-) as final products. Various inermediates, identical in the presence of both photocatalysts, have been detected and identified using HPLC and GC-MS techniques. The similarity of the intermediates by these two methods, i.e. PW12O403- and TiO2 tends to suggest, that the photodegradation mechanism of fenitrothion as other cases as well, takes place mainly via a common reagent, i.e. OH radicals. A photodegradation mechanism is proposed. Photolysis of fenitrothion, i.e. in the absence of catalysts is very slow and far from producing complete mineralization. A relatively large number of intermediates is observed, most of which are not detected in the photocatalytic processes. © 2003 Elsevier B.V. All rights reserved.	en
heal.journalName	Applied Catalysis B: Environmental	en
dc.identifier.doi	10.1016/j.apcatb.2003.10.002	en
dc.identifier.volume	48	en
dc.identifier.issue	3	en
dc.identifier.spage	175	en
dc.identifier.epage	183	en