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Degradation of organic pollutants in aquatic environment photoinduced by Fe(III)Cit complex: Impact of TiO2
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SYSNO ASEP 0359748 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Degradation of organic pollutants in aquatic environment photoinduced by Fe(III)Cit complex: Impact of TiO2 Author(s) Kolář, Michal (UFCH-W)
Jirkovský, Jaromír (UFCH-W) RID
Mailhot, G. (FR)
Bolte, M. (FR)
Krýsa, J. (CZ)Source Title Catalysis Today. - : Elsevier - ISSN 0920-5861
Roč. 161, č. 1 (2011), s. 127-132Number of pages 6 s. Language eng - English Country NL - Netherlands Keywords ferric citrate ; TiO2 ; monuron Subject RIV CG - Electrochemistry R&D Projects 1M0577 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000287730900023 DOI 10.1016/j.cattod.2010.12.004 Annotation Kinetics of photoinduced degradation of monuron (N-(4-chlorophenyl)-N',N'-dimethylurea) in three different photocatalytic systems (Fe(III)Cit, TiO2, combined system Fe(III)Cit + TiO2) were studied and compared. Principal importance of pH on the efficiency of the systems containing ferric citrate was found (optimal pH near 3). Positive effect of TiO2 addition (24 mg L-1) to Fe(III)Cit (2.55 x 10(-4) mol L-1) was observed at the optimal pH. This effect was emphasized with tenfold lower concentration of Fe(III) Cit (2.55 x 10(-5) mol L-1). On the contrary, the reaction was practically inhibited close to neutral pH. At acid pH, more active species of both Fe(III) Cit and Fe(III) aquacomplexes are present. During photolysis of the Fe(III) Cit complex, a proton is consumed, restoring hydroxyl group; if the pH approaches the neutral zone, the Fe(III) tends to form aggregates, which are far less photoactive. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2012
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