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| rdf:type
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| Description
| - Pomocí nanosekundové spektroskopie a analýzy produktů byla studována fotoindukovaná degradace 4 chloranilinu (4 CA), typického halogenaromatického polutantu, v kyselých (pH 2 4) roztocích Fe(ClO4)3. Rozklad 4 CA je iniciován atakem OH radikálů za vzniku radikálového kationtu 4 CA??. Při vysokém toku fotonů probíhal zánik 4 CA?? kinetikou druhého řádu, při nízkém toku fotonů byl patrný urychlující vliv Fe(III). Kontinuální ozařování za přístupu vzduchu při lambda(exc) = 365 nm vedlo ke vzniku mnoha meziproduktů se substituovaným či otevřeným aromatickým jádrem popř. oligomerů. Při vyšší koncentraci 4 CA se specifičnost zvýšila, oligomerační cesta se stala dominantní a vedla ke vzniku tří hlavních produktů. Chemické struktury těchto oligomerů, jakož i vznik redoxního páru p benzochinon/hydrochinon jako hlavního produktu za nepřístupu vzduchu, vedly k domněnce, že klíčovým reakčním meziproduktem degradace 4 CA je p bezochinon monoimin, vznikající patrně přímou reakcí 4 CA?? s Fe(III). (cs)
- The degradation of a prototypical halogenoaromatic pollutant, 4-chloroaniline (4-CA), photoinduced by Fe(111) species, has been studied in acidic aqueous solutions (pH 2-4) of Fe(ClO4)(3) by means of product analysis and nanosecond transient absorption spectroscopy. The degradation process is initiated by the attack of OH radicals on 4-CA, leading to radical cations, 4-CA(.+) as the major transient species. At high photon fluences, the decay of 4-CA(.+) is dominated by second-order reactions; an accelerating effect of Fe(111) could be evidenced at low fluence. A large number of minor reaction intermediates could be detected by product analysis following continuous irradiation at lambda(exc) = 365 nm of aerated solutions, arising from ring substitution, ring opening and oligomerization processes. At higher concentration of 4-CA, the specificity of the degradation process increases; the oligomerization pathway becomes predominant and leads to three major oligomeric products.
- The degradation of a prototypical halogenoaromatic pollutant, 4-chloroaniline (4-CA), photoinduced by Fe(111) species, has been studied in acidic aqueous solutions (pH 2-4) of Fe(ClO4)(3) by means of product analysis and nanosecond transient absorption spectroscopy. The degradation process is initiated by the attack of OH radicals on 4-CA, leading to radical cations, 4-CA(.+) as the major transient species. At high photon fluences, the decay of 4-CA(.+) is dominated by second-order reactions; an accelerating effect of Fe(111) could be evidenced at low fluence. A large number of minor reaction intermediates could be detected by product analysis following continuous irradiation at lambda(exc) = 365 nm of aerated solutions, arising from ring substitution, ring opening and oligomerization processes. At higher concentration of 4-CA, the specificity of the degradation process increases; the oligomerization pathway becomes predominant and leads to three major oligomeric products. (en)
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| Title
| - Iron(III) - Photoinduced Degradation of 4-chloroaniline in Aqueous Solution
- Iron(III) - Photoinduced Degradation of 4-chloroaniline in Aqueous Solution (en)
- Fotoindukovaná degradace 4 chloranilinu ve vodných roztocích železitých solí (cs)
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| skos:prefLabel
| - Iron(III) - Photoinduced Degradation of 4-chloroaniline in Aqueous Solution
- Iron(III) - Photoinduced Degradation of 4-chloroaniline in Aqueous Solution (en)
- Fotoindukovaná degradace 4 chloranilinu ve vodných roztocích železitých solí (cs)
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| skos:notation
| - RIV/61388955:_____/04:00107642!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(GA203/02/0983), P(GA203/99/0763), Z(AV0Z4040901)
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| http://linked.open...iv/cisloPeriodika
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| 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
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| http://linked.open...ai/riv/idVysledku
| - RIV/61388955:_____/04:00107642
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| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - iron(III); photoinduced processes; environmental photochemistry (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Jirkovský, Jaromír
- Bolte, M.
- Lemr, K.
- Hykrdová, Lenka
- Grabner, G.
- Maihot, G.
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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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