Decolorization of dyes with copper(II)/organic acid/hydrogen peroxide systems
| Autor: | Pradeep Verma, Jiri Gabriel |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
chemistry.chemical_classification
Process Chemistry and Technology Radical Inorganic chemistry chemistry.chemical_element Decomposition Copper Remazol Brilliant Blue R Catalysis chemistry.chemical_compound chemistry Succinic acid Methyl orange Hydrogen peroxide General Environmental Science Nuclear chemistry Organic acid |
| Zdroj: | Applied Catalysis B: Environmental. 46:287-292 |
| ISSN: | 0926-3373 |
| DOI: | 10.1016/s0926-3373(03)00220-0 |
| Popis: | Decolorization of dyes belonging to various groups was carried out using novel free radicals-generating systems consisting of Cu(II), organic acids and hydrogen peroxide. Among the organic acids tested, succinic acid was the most effective. A 24 h incubation in the presence of 10 mM Cu(II), 200 mM succinic acid, and 100 mM H 2 O 2 resulted in 85–95% decolorization of Remazol Brilliant Blue R (RBBR), Reactive Blue, Poly B-411, Chicago Sky Blue, Evans Blue and Methyl Orange. The replacement of Cu(II) with other transition metals was less effective but 78% decolorization was detected in the case of Co(II) and succinic acid. The decolorization is due to the formation of hydroxyl radicals, formed during the decomposition of H 2 O 2 by the metal–ligand complex. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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