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| Description
| - Kinetics of oxidative photodegradation of Monuron(3-(4-chlorophenyl)-1,1-dimethylurea) in different photocatalytic systems (iron, TiO2 and combined system iron + TiO2) were investigated and compared. The influence of iron addition on TiO2 photocatalyst and of TiO2 on the photocatalytic cycle FE(III)/Fe(II) were carefuly studied. A very positive effect of iron addition was observed. This phenomena was more and more pronounced when TiO2 concentration was lower. In a suspension of TiO2 (24mg L-1) with addition of Fe(III) (3x10-4 molL-1) the measured rate constant was similar to that obtained in a suspension of TiO2 with a concentration more than 20 times hogher (500mg L-1). The mechanistic approach carried out in this study allows us to identify the main reactions governing the combined system and a photochemical cycle was proposed. The optimization of the photocatalytic systems was obtained when each photocatalyst plays a specific role.
- Kinetics of oxidative photodegradation of Monuron(3-(4-chlorophenyl)-1,1-dimethylurea) in different photocatalytic systems (iron, TiO2 and combined system iron + TiO2) were investigated and compared. The influence of iron addition on TiO2 photocatalyst and of TiO2 on the photocatalytic cycle FE(III)/Fe(II) were carefuly studied. A very positive effect of iron addition was observed. This phenomena was more and more pronounced when TiO2 concentration was lower. In a suspension of TiO2 (24mg L-1) with addition of Fe(III) (3x10-4 molL-1) the measured rate constant was similar to that obtained in a suspension of TiO2 with a concentration more than 20 times hogher (500mg L-1). The mechanistic approach carried out in this study allows us to identify the main reactions governing the combined system and a photochemical cycle was proposed. The optimization of the photocatalytic systems was obtained when each photocatalyst plays a specific role. (en)
- Byla srovnána kinetika fotodegracace monuronu (3-(4-chlorfenyl)-1,1-dimethylmočoviny) v různých fotokatalytických soustavách (Fe(III), TiO2 a kombinace Fe(III) + TiO2). Zvláště podrobně byly zkoumány důsledky přídavku Fe(III) k soustavě TiO2 a vliv přítomnosti TiO2 na fotokatalytický cyklus Fe(III)/Fe(II). Přitom byl zjištěn velmi pozitivní efekt přídavku Fe(III), zvláště patrný při nízkých koncentracích TiO2. V suspenzi TiO2 (24 mg dm 3) s přídavkem Fe(III) (3?10 4 mol dm 3) byla rychlostní konstanta degradace srovnatelná s hodnotou naměřenou pro suspenzi TiO2 o více než dvacetinásobné koncentraci (500 mg dm 3) za nepřítomnosti Fe(III). Mechanistický přístup dovolil zjistit hlavní reakce v kombinované fotokatalytické soustavě, na jejichž základě byl navržen pravděpodobný fotochemický cyklus. Optimální funkce kombinované soustavy se dosáhne, pokud každý z fotokatalyzátorů hraje plně svoji specifickou roli, tj. Fe(III) jako hlavní zdroj OH radikálů a TiO2 jako oxidační činidlo Fe(II). (cs)
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| Title
| - Mechanistic Approach of the Combined (Iron-TiO2) Photocatalytic System for the Degradation of Pollutants in Aqueous Solution: An Attempt of Rationalisation
- Kombinovaný fotokatalytický systém Fe(III) - TiO2 pro degradaci polutantů ve vodných roztocích: pokus o vysvětlení na základě mechanismu (cs)
- Mechanistic Approach of the Combined (Iron-TiO2) Photocatalytic System for the Degradation of Pollutants in Aqueous Solution: An Attempt of Rationalisation (en)
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| skos:prefLabel
| - Mechanistic Approach of the Combined (Iron-TiO2) Photocatalytic System for the Degradation of Pollutants in Aqueous Solution: An Attempt of Rationalisation
- Kombinovaný fotokatalytický systém Fe(III) - TiO2 pro degradaci polutantů ve vodných roztocích: pokus o vysvětlení na základě mechanismu (cs)
- Mechanistic Approach of the Combined (Iron-TiO2) Photocatalytic System for the Degradation of Pollutants in Aqueous Solution: An Attempt of Rationalisation (en)
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| skos:notation
| - RIV/61388955:_____/04:00107666!RIV/2005/AV0/A54005/N
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(GA104/02/0662), P(GA203/02/0983), Z(AV0Z4040901)
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| http://linked.open...iv/cisloPeriodika
| |
| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/61388955:_____/04:00107666
|
| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| |
| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| |
| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...v/svazekPeriodika
| |
| http://linked.open...iv/tvurceVysledku
| - Jirkovský, Jaromír
- Krýsa, J.
- Mailhot, G.
- Bolte, M.
- Měšťánková, H.
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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