"Cu(II)-chitosan komplexy byly pou\u017Eity jako heterogenn\u00ED katalyz\u00E1tory pro degradaci p\u011Bti modelov\u00FDch textiln\u00EDch barviv ve vodn\u00E9m roztoku s peroxidem vod\u00EDku. Nej\u00FA\u010Dinn\u011Bj\u0161\u00ED katalyz\u00E1tor obsahoval 3.6% Cu2+ a optim\u00E1ln\u00ED reak\u010Dn\u00ED podm\u00EDnky byly pH 7.0 a 50 mM peroxid vod\u00EDku. Bylo zji\u0161t\u011Bno, \u017Ee rychlost odbarven\u00ED p\u0159\u00EDmo z\u00E1vis\u00ED na koncentrac\u00EDch barviva a peroxidu vod\u00EDku v reak\u010Dn\u00ED sm\u011Bsi. Azobarviva obsahuj\u00EDc\u00ED ve sv\u00E9 molekule nitroskupinu se oxidovala snadn\u011Bji ne\u017Eli ta bez nitroskupiny. Za pou\u017Eit\u00ED optim\u00E1ln\u00EDch reak\u010Dn\u00EDch podm\u00EDnek bylo 91.5% odbarven\u00ED barviva III (0.04 mM) dosa\u017Eeno po 20 min reakce. Av\u0161ak 180 min bylo t\u0159eba k tomu aby se z 85% odbarvilo barvivo I o podobn\u00E9 koncentraci. Jedin\u00FDm strukturn\u00EDm rozd\u00EDlem je jedna nitroskupina v para poloze vzhledem k azo vazb\u011B."@cs . . "19-24" . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . . "Oxidace textiln\u00EDch rozpustn\u00FDch azobarviv peroxidem vod\u00EDku v p\u0159\u00EDtomnosti Cu(II)-chitosan heterogenn\u00EDm katalyz\u00E1torem"@cs . . "25310" . "RIV/00216275:25310/07:00006439!RIV08-MSM-25310___" . . . "440383" . "Chitosan; Oxidation; Catalyst; Textile; Dyes"@en . . "Oxidation of azo textile soluble dyes with hydrogen peroxide in the presence of Cu(II)-chitosan heterogeneous catalysts" . . "73" . "6"^^ . "Hrdina, Radim" . . "Oxidation of azo textile soluble dyes with hydrogen peroxide in the presence of Cu(II)-chitosan heterogeneous catalysts"@en . "Oxidation of azo textile soluble dyes with hydrogen peroxide in the presence of Cu(II)-chitosan heterogeneous catalysts"@en . "1" . "\u0160ul\u00E1kov\u00E1, Romana" . . "Soares, Graca" . "Dyes and Pigments" . "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 and 50 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." . "0143-7208" . . "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 and 50 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."@en . . "Oxidation of azo textile soluble dyes with hydrogen peroxide in the presence of Cu(II)-chitosan heterogeneous catalysts" . "RIV/00216275:25310/07:00006439" . "Z(MSM0021627501)" . "[A78D8BD668D6]" . . . "3"^^ . . . . . "1"^^ . "Oxidace textiln\u00EDch rozpustn\u00FDch azobarviv peroxidem vod\u00EDku v p\u0159\u00EDtomnosti Cu(II)-chitosan heterogenn\u00EDm katalyz\u00E1torem"@cs .