Laccase-catalyzed bisphenol A oxidation in the presence of 10-propyl sulfonic acid phenoxazine  

作　　者：Ruta Ivanec-Goranina Juozas Kulys Irina Bachmatova Liucija Marcinkeviciene Rolandas Meskys 

机构地区：[1]Department of Chemistry and Bioengineering,Faculty of Fundamental Sciences,Vilnius Gediminas Technical University [2]Institute of Biochemistry,Vilnius University

出　　处：《Journal of Environmental Sciences》2015年第4期135-139,共5页环境科学学报（英文版）

基　　金：supported by European Social Foundation and the Republic of Lithuania(under project no.VP1-3.1-SMM-08-K01-001)

摘　　要：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-ylpropane-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., at0.2 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.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-ylpropane-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., at0.2 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.

关 键 词：Bisphenol A OXIDATION LACCASE PHENOXAZINE 

分 类 号：TQ243.12[化学工程—有机化工] X789.03[环境科学与工程—环境工程]