Počet záznamů: 1

Degradation of organic pollutants in aquatic environment photoinduced by Fe(III)Cit complex: Impact of TiO2

  1. 1.
    0359748 - UFCH-W 2012 RIV NL eng J - Článek v odborném periodiku
    Kolář, Michal - Jirkovský, Jaromír - Mailhot, G. - Bolte, M. - Krýsa, J.
    Degradation of organic pollutants in aquatic environment photoinduced by Fe(III)Cit complex: Impact of TiO2.
    Catalysis Today. Roč. 161, č. 1 (2011), s. 127-132 ISSN 0920-5861
    Grant CEP: GA MŠk 1M0577
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: ferric citrate * TiO2 * monuron
    Kód oboru RIV: CG - Elektrochemie
    Impakt faktor: 3.407, rok: 2011

    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.
    Trvalý link: http://hdl.handle.net/11104/0197470