| 水环境中红霉素和罗红霉素抗生素光降解的研究 |
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| 引用本文： | 肖健,刘林梅,邹世春.水环境中红霉素和罗红霉素抗生素光降解的研究[J].广州化学,2008,33(2):1-5. |
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| 作者姓名： | 肖健 刘林梅 邹世春 |
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| 作者单位： | 1. 深圳市环境监测中心站,广东,深圳,518049
2. 中山大学,化学与化学工程学院,广东,广州,510275 |
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| 基金项目： | 国家自然科学基金
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广东省自然科学基金 |
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| 摘 要： | 采用固相萃取分离富集，LC—MS-MS为检测平台，研究了水环境中低浓度（10mg／L）红霉素和罗红霉素的光降解效率及其影响因素。结果表明，在接近中性（pH=7．5）的水溶液中，经过1h的光照，两种抗生素的光降解率在30％以下；而在有2000mg／LTiO2催化剂存在时，光照15min，二者的降解率即可分别达95．5％和97．2%,此时溶液的pH值对光催化降解的影响不大。实验也表明，光直接降解反应和光催化降解反应均符合一级反应动力学。
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| 关 键 词： | 红霉素 罗红霉素 光降解 光催化降解 |
| 文章编号： | 1009-220X(2008)02-0001-05 |
| 修稿时间： | 2007年11月13 |
Photodegradation Behavior of Representative Macrolide Antibiotics in Water Environment |
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| XIAO Jian,LIU Lin-mei,ZOU Shi-chun.Photodegradation Behavior of Representative Macrolide Antibiotics in Water Environment[J].Guangzhou Chemistry,2008,33(2):1-5. |
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| Authors: | XIAO Jian LIU Lin-mei ZOU Shi-chun |
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| Affiliation: | XIAO Jian, LIU Lin-mei, ZOU Shi-chun ( 1. Shenzhen Environmental Protection Monitoring Center, Shenzhen 510049, China; 2. School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China) |
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| Abstract: | The photochemical behavior of representative macrolide antibiotics including erythromycin(ETM) and roxithromycin(RTM) in water has been studied upon irradiation as well as photocatalysed treatment using solid phase extraction following LC-MS-MS determination.The effects of pH,TiO2 content and irradiation time on the antibiotics were investigated.The results showed that the photolytic ratios of ETM and RTM were below 30%,when irradiated for 1 h at pH 7.5;however,their photolytic ratios could be increased to 95.5% and 97.2% respectively in 15 min when 2000 mg/L of TiO2 was added and less effect from pH value was found.Both the photodegradation and the photocatalytic degradation procedures obey the first-order reaction kinetics. |
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| Keywords: | erythromycin roxithromycin photodegradation photocatalytic degradation |
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