Oxidace textilních rozpustných azobarviv peroxidem vodíku v přítomnosti Cu(II)-chitosan heterogenním katalyzátorem

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F07%3A00006439" target="_blank" >RIV/00216275:25310/07:00006439 - 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

Oxidation of azo textile soluble dyes with hydrogen peroxide in the presence of Cu(II)-chitosan heterogeneous catalysts

Popis výsledku v původním jazyce

Cu(II)-chitosan complexes were used as heterogeneous catalysts for degradation of five model azo textile dyes in aqueous solution with hydrogen peroxide. The most efficient catalyst contained 3.6% Cu2+ and the optimal reaction conditions were pH 7.0 and50 mM of hydrogen peroxide. The rate of decolourisation was found to be directly dependent on the dye and hydrogen peroxide concentrations in the reaction mixture. Azo dyes containing the nitro group in their molecule were easier to oxidise than those lacking this group. Using optimal reaction conditions, 91.5% decolourisation of dye III (0.04 mM) was obtained after about 20 min of reaction. However, 180 min were needed to decolorize about 85% of similar concentration of dye I. The only chemical structural difference is one nitro group on para position in relation to the azo bond.

Název v anglickém jazyce

Oxidation of azo textile soluble dyes with hydrogen peroxide in the presence of Cu(II)-chitosan heterogeneous catalysts

Popis výsledku anglicky

Cu(II)-chitosan complexes were used as heterogeneous catalysts for degradation of five model azo textile dyes in aqueous solution with hydrogen peroxide. The most efficient catalyst contained 3.6% Cu2+ and the optimal reaction conditions were pH 7.0 and50 mM of hydrogen peroxide. The rate of decolourisation was found to be directly dependent on the dye and hydrogen peroxide concentrations in the reaction mixture. Azo dyes containing the nitro group in their molecule were easier to oxidise than those lacking this group. Using optimal reaction conditions, 91.5% decolourisation of dye III (0.04 mM) was obtained after about 20 min of reaction. However, 180 min were needed to decolorize about 85% of similar concentration of dye I. The only chemical structural difference is one nitro group on para position in relation to the azo bond.

Druh

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

CEP obor

CC - Organická chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2007

Kód důvěrnosti údajů

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

Název periodika

Dyes and Pigments

ISSN

0143-7208

e-ISSN

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Svazek periodika

73

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

19-24

Kód UT WoS článku

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EID výsledku v databázi Scopus

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