Laccase-catalyzed conversion of natural and synthetic hormones from a municipal wastewater

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• 作者：Muriel Auriol ; Youssef Filali-Meknassi ; Rajeshwar D. Tyagi ; Craig D. Adams
• 关键词：Steroid estrogen ; Endocrine disrupter ; Laccase ; Kinetic study ; Wastewater ; HBT
• 刊名：Water Research
• 出版年：2007
• 出版时间：August 2007
• 年：2007
• 卷：41
• 期：15
• 页码：3281-3288
• 全文大小：448 K

文摘

The Trametes versicolor-derived laccase-catalyzed oxidation of natural estrogens (estrone—E1; 17β-estradiol—E2; and estriol—E3) and a synthetic estrogen (17α-ethinylestradiol—EE2) was studied in synthetic water and municipal wastewater to optimize the process for steroid estrogen removal in wastewater. The optimal pH for each studied steroid estrogen oxidation was approximately 6 in synthetic water. This research also focused on the wastewater matrix effect on developed enzymatic treatment. At pH 7.0 and 25±1 °C, the experiments showed that the laccase-catalyzed system for the removal of steroid estrogens was not significantly affected by the municipal wastewater matrix. Laccase activity of 20 U/ml was sufficient to achieve complete removal of studied steroid estrogens in both synthetic water and municipal wastewater. Moreover, 1-hydroxy-benzotriazole, when used as a mediator, improved laccase-catalyzed system efficiency, thus decreasing the overall cost of the enzymatic system.