Photocatalytic degradation of 4-chlorophenoxyacetic acid in the presence of an iron complex and hydrogen peroxide.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F02%3A50023019" target="_blank" >RIV/61388980:_____/02:50023019 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Photocatalytic degradation of 4-chlorophenoxyacetic acid in the presence of an iron complex and hydrogen peroxide.

Popis výsledku v původním jazyce

The photoinitiated transformation of 4-chlorophenoxyacetic acid (CPA) in aqueous solutions is described in detail. The photocatalytic system consists of CPA, hydrogen peroxide (no oxygen) and the complex iron(III) acetylacetonate Fe(acac)(3). Special attention was paid to the choice of irradiation wavelength in order to separate the contribution of the iron-photocatalyzed reaction from that of direct photoreactions. This was achieved by selecting a wavelength of 365 nm, which is absorbed exclusively bythe iron complex. We specified the conditions for effective photocatalytic degradation of CPA with high quantum yields which depend on the concentration of Fe(acac)(3). The reaction is primarily initiated by absorption of 365 nm radiation by Fe(acac)(3)followed by the photoreduction of Fe(III)(acac)(3) to Fe(II)(acac)(2) and subsequently by the Fenton reaction with hydrogen peroxide producing highly reactive hydroxyl radicals OH+. The main degradation intermediates are phenol and 4-chlo

Název v anglickém jazyce

Photocatalytic degradation of 4-chlorophenoxyacetic acid in the presence of an iron complex and hydrogen peroxide.

Popis výsledku anglicky

The photoinitiated transformation of 4-chlorophenoxyacetic acid (CPA) in aqueous solutions is described in detail. The photocatalytic system consists of CPA, hydrogen peroxide (no oxygen) and the complex iron(III) acetylacetonate Fe(acac)(3). Special attention was paid to the choice of irradiation wavelength in order to separate the contribution of the iron-photocatalyzed reaction from that of direct photoreactions. This was achieved by selecting a wavelength of 365 nm, which is absorbed exclusively bythe iron complex. We specified the conditions for effective photocatalytic degradation of CPA with high quantum yields which depend on the concentration of Fe(acac)(3). The reaction is primarily initiated by absorption of 365 nm radiation by Fe(acac)(3)followed by the photoreduction of Fe(III)(acac)(3) to Fe(II)(acac)(2) and subsequently by the Fenton reaction with hydrogen peroxide producing highly reactive hydroxyl radicals OH+. The main degradation intermediates are phenol and 4-chlo

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Photochemical and Photobiological Sciences

ISSN

1474-905X

e-ISSN

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Svazek periodika

1

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

4

Strana od-do

588-591

Kód UT WoS článku

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EID výsledku v databázi Scopus

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