Laccase-catalyzed bisphenol A oxidation in the presence of 10-propyl sulfonic acid phenoxazine
| Autor: | Juozas Kulys, Rūta Ivanec-Goranina, Liucija Marcinkevičienė, Irina Bachmatova, Rolandas Meškys |
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| Rok vydání: | 2014 |
| Předmět: |
Bisphenol A
Environmental Engineering Kinetics Sulfonic acid Medicinal chemistry Catalysis Reaction rate Electron Transport chemistry.chemical_compound Phenols Oxazines Environmental Chemistry Organic chemistry Reactivity (chemistry) Benzhydryl Compounds General Environmental Science chemistry.chemical_classification Chemistry Laccase Substrate (chemistry) Drug Synergism General Medicine Sulfonic Acids Coriolaceae Phenoxazine Oxidation-Reduction |
| Zdroj: | Journal of environmental sciences (China). 30 |
| ISSN: | 1001-0742 |
| Popis: | The kinetics of the Coriolopsis byrsina laccase-catalyzed bisphenol A (BisA) oxidation was investigated in the absence and presence of electron-transfer mediator 3-phenoxazin-10-yl-propane-1-sulfonic acid (PPSA) at pH 5.5 and 25°C. It was shown that oxidation rate of the hardly degrading compound BisA increased in the presence of the highly reactive substrate PPSA. The increase of reaction rate depends on PPSA and BisA concentrations as well on their ratio, e.g., at 0.2 mmol/L of BisA and 2 μmol/L of PPSA the rate increased 2 times. The kinetic data were analyzed using a scheme of synergistic laccase-catalyzed BisA oxidation. The calculated constant, characterizing reactivity of PPSA with laccase, is almost 1000 times higher than the constant, characterizing reactivity of BisA with laccase. This means that mediator-assisted BisA oxidation rate can be 1000 times higher in comparison to non-mediator reaction if compounds concentration is equal but very low. |
| Databáze: | OpenAIRE |
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