摘要
研究了化学合成的新生态δ-MnO2对乙炔基雌二醇(EE2)的氧化降解动力学,并且考察了δ-MnO2投加量、EE2初始浓度、初始pH值等因素对EE2降解动力学的影响。结果表明:EE2对新生态水合δ-MnO2的氧化作用具有较强的反应感受性,且在pH值一定和δ-MnO2充分过量的条件下,EE2氧化降解的反应动力学并不是简单的准一级反应动力学,而是遵循复合的反应动力学;EE2氧化降解的初始反应速率与δ-MnO2投加量和EE2初始浓度成正相关,而与pH值成负相关;采用重组人雌激素受体基因酵母试剂盒考察了整个降解过程中反应液雌激素生物毒性效应的变化情况,发现反应8小时后雌激素总体效应降低了55%左右,这说明二氧化锰不仅能有效去除EE2的浓度,而且对雌激素活性也能有效地去除。
Oxidative degradation of ethinyl estradiol （EE2） by δ-MnO2 was investigated in batch experiments, and the influence of δ-MnO2 dosage, initial EE2 concentration and pH value on the reaction kinetics was discussed. Results showed that during the process, EE2 was degraded by δ-MnO2 efficiently in aqueous solutions, and the oxidative degradation deviated from the pseudo-first-order kinetics at a constant pH and with an enough excess of δ-MnO2. δ-MnO2 dosage and initial EE2 concentration had a positive effect on oxidative transformation of EE2, and the initial reaction rate increased as pH decreasing. A bioassay method using the cells of recombinant gene yeast was used to determine the activity of estrogen in the process, it was found that 55% of the estrogenic activity was reduced after 8h reaction by MnO2, which indicated that both of EE2 concentration and estrogenic activity could be reduced by MnO2 effectively.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2011年第12期39-44,共6页
Environmental Science & Technology
基金
浙江省自然科学基金项目(Y506237)
浙江省科技厅分析测试项目(2008F70014)
