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Effect of dissolved ozone or ferric ions on photodegradation of thiacloprid in presence of different TiO2 catalysts
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SYSNO ASEP 0350961 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of dissolved ozone or ferric ions on photodegradation of thiacloprid in presence of different TiO2 catalysts Author(s) Černigoj, U. (SI)
Štangar, U. L. (SI)
Jirkovský, Jaromír (UFCH-W) RIDSource Title Journal of Hazardous Materials. - : Elsevier - ISSN 0304-3894
Roč. 177, 1-3 (2010), s. 399-406Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords neonicotionoid pesticides ; photocatalysis ; ozonation Subject RIV CF - Physical ; Theoretical Chemistry CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000276154500050 DOI 10.1016/j.jhazmat.2009.12.046 Annotation Combining TiO2 photocatalysis with inorganic oxidants (such as O-3 and H2O2) or transition metal ions (Fe3+, Cu2+ and Ag+) often leads to a synergic effect. Electron transfer between TiO2 and the oxidant is usually involved. Accordingly, the degree of synergy could be influenced by TiO2 surface area. With this in mind, the disappearance of thiacloprid, a neonicotinoid insecticide, was studied applying various photochemical AOPs and different TiO2 photocatalysts. In photocatalytic ozonation experiments, synergic effect of three different TiO2 photocatalysts was quantified. Higher surface area resulted in a more pronounced synergic effect but an increasing amount of TiO2 did not influence the degree of the synergy. This supports the theory that the synergy is a consequence of adsorption of ozone on the TiO2 surface. No synergy was observed in photocatalytic degradation of thiacloprid in the presence of dissolved iron(III) species performed under varied experimental conditions. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2011
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