Laccase-catalyzed Oxidation of 17α-ethinylestradiol in Wastewater
LI Hongmei
Abstract：Laccase-catalyzed oxidation was used in the treatment of 17α-ethinylestradiol (EE2) in wastewater.The effects of temperature,pH,initial concentration of substrate and laccase,and mediator on the removal effiency of EE2 were inverstigated.EE2 can be effectively oxidized by oxygen catalyzed by laccase in wastewater.The optimal conditions for the removal of EE2 were 35 ℃,pH 5.38 and the initial ratio of [laccase] to [EE2] ＞0.178 U/μmol.The removal efficiency of EE2 was more than 92％ after 180 min reaction under the optimal conditions.The EE2 removal efficiency decreased with its concentration increasing from 0.017 1 mmol/L to 0.051 3 mmol/L,while the quantity of EE2 removed increased.Both EE2 removal efficiency and its removed quantity decreased with its concentration increasing from 0.051 3 mmol/L to 0.137 6 mmol/L.Both stirring reaction mixture and ABTS added to reaction mixture can accelerate the reaction rate and enhance EE2 removal efficiency.
Keywords：laccasecatalyzed oxidation17α-ethinylestradiol
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 24-30 )