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酶催化氧化法处理水中的己烯雌酚

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酶催化氧化法处理水中的己烯雌酚
时间:2023-02-01 02:33:24     小编:

关键词:酶催化氧化;处理;己烯雌酚

Enzyme-Catalyzed Oxidation of Diethylibestrol in Aqueous Phase

LI Hong-mei

(School of Safety and Environmental Engineering, Capital University of Economics and Business, Beijing 100070, China)

Key words: enzyme-catalyzed oxidation; disposal; diethylibestrol

1.1 仪器与试剂

Britton-Robinson缓冲溶液配制方法参考文献[23]。

HRP活性测定采用ABTS法[25]。

2 结果与分析

2.1 pH对DES去除效果的影响

2.3 HRP与DES用量之比对DES去除率的影晌

2.4 H2O2浓度对DES去除率的影晌

2.5 DES起始浓度对去除速率的影晌

3 结论

试验得出以下结论:

2)HRP催化H2O2氧化DES的适宜温度为25 ℃。

3)DES去除率随[HRP]0/[DES]0增大而升高。当[HRP]0/[DES]0大于0.5 U/μmol时, DES去除率超过90%。[HRP]0/[DES]0的适宜比值为1.000 U/μmol。

5)DES起始浓度越高,其去除速率越大。以底物DES表示的最大反应速率Vmax和米氏常数Km分别为74.63 mmol/(L・h)和46.75 mmol/L。

参考文献:

[2] ZHONG X,XU Y,LIANG Y,et al.The Chinese rare minnow (Gobiocypris rarus) as an in vivo model for endocrine disruption in freshwater teleosts:A full life-cycle test with diethylstilbestrol[J]. Aquatic Toxicology,2005,71(1): 85-95.

[4] SATO K,FUKATA H,KOGO Y,et al.Neonatal exposure to diethylstilbestrol alters expression of DNA methyltransferases and methylation of genomic DNA in the mouse uterus[J]. Endocrine Journal,2009,56(1):131-139.

[8] COLBRON T,VOM-SAAL F,SOTO A.Developmental effects of endocrine-disrupting chemicals in wildlife and humans[J]. Environ Health Perspect,1993,101(5):378-384.

[25] KHAN U,NICELL J A.Horseradish peroxidase-catalysed oxidation of aqueous natural and synthetic oestrogens[J]. Journal of Chemical Technology and Biotechnology,2007,82(9):818-830.

[27] AURIOL M, FILALI-MEKNASSI Y,ADAMS C D,et al.Natural and synthetic hormone removal using the horseradish peroxidase enzyme:Temperature and pH effects[J]. Water Research,2006, 40:2847-2856.

[29] BERGLUND G I,CARLSSON G H,SMITH A T,et al.The catalytic pathway of horseradish peroxidase at high resolution[J].Nature, 2002, 417(6887):463-468.

[33] SAKUYAMA H, ENDO Y, FUJIMOTO K, et al. Oxidative degradation of alkylphenols by horseradish peroxidase[J]. Journal of Bioscience and Bioengineering,2003,96(3):227-231.

[35] AURIOL M,FILALI-MEKNASSI Y,ADAMS C D,et al.Removal of estrogenic activity of natural and synthetic hormones from a municipal wastewater:Efficiency of horseradish peroxidase and laccase from trametes versicolor[J]. Chemosphere,2008, 70(3):445-452.

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