| TiO2光催化降解水中内分泌干扰物17β-雌二醇 |
| 摘要点击 1963 全文点击 1382 投稿时间：2006-02-20 修订日期：2006-04-02 |
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| 中文关键词 TiO2 光催化 内分泌干扰物 17β-雌二醇 光降解速率常数 |
| 英文关键词 TiO2 photocatalytic endocrine disruptor 17β-estradiol photodegradation rate constant |
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| 中文摘要 |
| 以低压汞灯为光源，采用间歇式光氧化反应器，研究了17β-雌二醇(E2)在纳米TiO2(Degussa P-25)悬浆体系中的光催化降解.考察了溶液pH、E2初始浓度、TiO2光催化剂投加量、UV光强、H2O2、O2对E2光催化降解的影响.结果表明，TiO2光催化工艺可以有效地去除水中的E2，E2的光降解过程符合一级反应动力学模型;TiO2投加量为200 mg/L时,在14 W低压汞灯照射下,初始浓度为400 μg/L 的E2在自来水中的光降解一级反应速率常数为0.018 min-1,E2的光催化降解速率常数与其初始浓度、TiO2光催化剂的用量、溶液的pH值、UV光强等因素有关;外加H2O2、O2可以影响催化剂的光降解效率. |
| 英文摘要 |
| Photocatalytic degradation of endocrine disruptor 17β-estradiol （E2）in drinking water by nano titanium(Degussa P-25) suspended system was studied in a low pressure mercury lamp batch photo-reactor.Effects of reaction pH,E2 concentration, applied TiO2 dose,UV light power，H2O2,O3 were investigated respectively. The results show that the removal of E2 was effectively,The rate of photodegradation in aqueous solution followed first-order kinetics. When TiO2 was dosed as 200 mg/L, irradiated by a 14 W low pressure mercury vapor discharge lamp, the first order photodegradation rate constant of E2(initial concentration was 400 μg/L) in tap water was 0.018 min-1. The photodegradation rate constant of E2 was related to the influential factors mentioned above and that it can be affected by add H2O2、O2. |
