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Photodegradation dynamics of pure microcystin variants with illumination of fixed wavelength UV-lights
Chen, W; Gan, NQ; Song, LR; Chen, W, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2004
Source PublicationACTA CHIMICA SINICA
Volume62Issue:2Pages:142-147
AbstractPhotolysis 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.
KeywordMicrocystin Photodegradation Humic Acid Kinetic Isomerization Uv Irradiation
DepartmentChinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Subject AreaChemistry ; Multidisciplinary
Indexed BySCI
WOS IDWOS:000188418600007
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9578
Collection期刊论文
Corresponding AuthorChen, W, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Chen, W,Gan, NQ,Song, LR,et al. 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,&Chen, W, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.(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.
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