| 漆酶催化氧化水中雌激素的研究 |
| 摘要点击 2876 全文点击 1908 投稿时间：2012-11-19 修订日期：2013-01-14 |
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| 中文关键词 雌激素 漆酶 天然有机质 动力学 产物 |
| 英文关键词 endocrine disrupting chemicals laccase natural organic matter kinetics reaction products |
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| 中文摘要 |
| 采用漆酶催化氧化去除水中5种雌激素(BPA、E2、EE2、E1、OP),探讨了pH和水溶性天然有机质(NOM)对雌激素处理效率的影响,并深入研究了EE2在漆酶催化氧化过程中的反应动力学以及主要的反应产物. 结果表明,水中雌激素均可被漆酶有效地去除,其反应的适宜pH值范围为4~6; NOM对5种雌激素的去除效率在反应初期有较明显的抑制作用; 漆酶催化氧化EE2的过程遵循二级反应动力学,而在反应过程中,漆酶的稳定性比过氧化物酶要高; 由自由基耦合形成的EE2二聚体是漆酶反应的主要产物. |
| 英文摘要 |
| The removal of 5 estrogens (bisphenol A, estradiol, ethinylestradiol, estrone and octylphenol) in laccase catalyzed oxidative processes was studied. The effects of pH and NOM on the removal of EDCs were discussed in detail, as well as the kinetics of EE2 removal and the reaction products. The results indicated that laccase was capable of removing estrogens efficiently. The optimal pH was between 4 and 6. NOM significantly inhibited the removal of estrogens at the initial stage of the reaction. However, the adverse effect of NOM was not obvious after 24 h treatment. The removal of EE2 obeyed the second-order kinetics. The activity of laccase remained stable during the reactions and the stability was higher than that of peroxidase. MS analysis demonstrated that the EE2 dimer formed through radical coupling mechanism was the main reaction product. |
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