| 高铁酸盐对藻类肝毒素的降解 |
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| 引用本文： | 苑宝玲,曲久辉,王敏.高铁酸盐对藻类肝毒素的降解[J].环境科学,2002,23(2):96-99. |
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| 作者姓名： | 苑宝玲 曲久辉 王敏 |
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| 作者单位： | 1. 中国科学院生态环境研究中心环境水化学国家重点实验室,北京,100085
2. 北京林业大学资源与环境学院,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目(20077031);中科院研究生科学与社会实践项目 |
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| 摘 要： | 研究高铁酸盐对悦目颤藻(Oscillatoria amoena)肝毒素(Microcystin-LR)的降解效能及其与pH的关系. 结果表明,处理有机质含量很高的藻类肝毒素粗提液,当高铁投加量增到40mg/L,pH控制在6～10,肝毒素几乎被完全降解.同时高铁的还原产物Fe3+、Fe(OH)3发挥其助凝、絮凝的作用,对水体中有机质吸附沉降去除,TOC去除率达到50%左右,铁几乎无残留.高效液相色谱分析发现,作用机制可能是高铁氧化或异构化Adda基团的共轭双键,使Adda基团的结构发生变化,从而降低其毒性.
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| 关 键 词： | 悦目颤藻 藻类肝毒素 高铁 氧化絮凝 |
| 文章编号： | 0250-3301(2002)02-04-0096 |
| 收稿时间： | 2001/3/27 0:00:00 |
| 修稿时间： | 6/4/2001 12:00:00 AM |
Degradation of Cyanobacterial Peptide Hepatotoxins by Ferrate |
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| Yuan Baoling,Qu Jiuhui and Wang Min.Degradation of Cyanobacterial Peptide Hepatotoxins by Ferrate[J].Chinese Journal of Environmental Science,2002,23(2):96-99. |
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| Authors: | Yuan Baoling Qu Jiuhui and Wang Min |
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| Institution: | SKLEAC, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. yuanbl@hotmail.com |
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| Abstract: | In this study, the effect of ferrate oxidation on stability of microcystins-LR (MCLR) in freeze dried Oscillatoria amoena was investigated. The toxin was easily decomposed by oxidation with ferrate, and the stability depended on the dosage of ferrate and pH. Simultaneously the product Fe(OH)3 after ferrate oxidation could flocculate the organic compounds so that 50% TOC removal of the extract was reached. The low residual iron reflected the excellent results of coagulation and could meet the standard of drinking water. The results show that ferrate oxidation may be an effective and practical method for the removal of cyanobacterial peptide toxins from drinking water. |
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| Keywords: | i>Oscillatoria amoena microcystin LR ferrate oxidation |
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