Photodegradation dynamics of pure microcystin variants with illumination of fixed wavelength UV-lights
文献类型：期刊论文
| 作者 | Chen, W; Gan, NQ; Song, LR |
| 刊名 | ACTA CHIMICA SINICA
 |
| 出版日期 | 2004-01-28 |
| 卷号 | 62期号:2页码:142-147 |
| 关键词 | microcystin photodegradation humic acid kinetic isomerization UV irradiation |
| ISSN号 | 0567-7351 |
| 通讯作者 | Chen, W, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China |
| 中文摘要 | Photolysis of microcystins by UV irradiation and the effects of different environmental factors on efficiency of UV degradation were studied. The results indicated that the rates of the photolytical degradation reactions of microcystin-LR and RR-follow pseudo-first-order kinetic process. The results also showed that the concentrations of two microcystin variants decreased significantly by UV-C Irradiation; the wavelength and intensitiy of UV irradiation are two very important factors affecting the rate of degradation; temperature and pH value could also affect the half life of degradation rates. When irradiated by weaker UV-Iight, isomerization could be detected in the course of photolytical degradation. The concentrations of two isomers transformed from microcystin-LR reached its maximum at the third minute and decreased with the time afterwards. To simulate photolysis of microcystins in the field water body, microcystins with low concentration were used. It was found that UV-C illumination was capable of decomposing over 95% of microcystins within 40 min. In the presence of humic substances the photodecomposition slowed down to a certain extent. These results are valuable in using UV irradiation for elimination microcystins from raw water. |
| 英文摘要 | Photolysis of microcystins by UV irradiation and the effects of different environmental factors on efficiency of UV degradation were studied. The results indicated that the rates of the photolytical degradation reactions of microcystin-LR and RR-follow pseudo-first-order kinetic process. The results also showed that the concentrations of two microcystin variants decreased significantly by UV-C Irradiation; the wavelength and intensitiy of UV irradiation are two very important factors affecting the rate of degradation; temperature and pH value could also affect the half life of degradation rates. When irradiated by weaker UV-Iight, isomerization could be detected in the course of photolytical degradation. The concentrations of two isomers transformed from microcystin-LR reached its maximum at the third minute and decreased with the time afterwards. To simulate photolysis of microcystins in the field water body, microcystins with low concentration were used. It was found that UV-C illumination was capable of decomposing over 95% of microcystins within 40 min. In the presence of humic substances the photodecomposition slowed down to a certain extent. These results are valuable in using UV irradiation for elimination microcystins from raw water. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Chemistry ; Multidisciplinary |
| 类目[WOS] | Chemistry, Multidisciplinary |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | HEPATOTOXINS ; PHOTOLYSIS ; WATER |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000188418600007 |
| 公开日期 | 2010-10-13 |
| 源URL | [http://ir.ihb.ac.cn/handle/152342/9578]  |
| 专题 | 水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文 |
| 作者单位 | Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, W,Gan, NQ,Song, LR. Photodegradation dynamics of pure microcystin variants with illumination of fixed wavelength UV-lights[J]. ACTA CHIMICA SINICA,2004,62(2):142-147. |
| APA | Chen, W,Gan, NQ,&Song, LR.(2004).Photodegradation dynamics of pure microcystin variants with illumination of fixed wavelength UV-lights.ACTA CHIMICA SINICA,62(2),142-147. |
| MLA | Chen, W,et al."Photodegradation dynamics of pure microcystin variants with illumination of fixed wavelength UV-lights".ACTA CHIMICA SINICA 62.2(2004):142-147. |
入库方式： OAI收割
来源：水生生物研究所
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