Effect of moderate pre-oxidation on the removal of Microcystis aeruginosa by KMnO4-Fe(II) process: Significance of the in-situ formed Fe(III)
文献类型：期刊论文
| 作者 | Ma, Min ; Liu, Ruiping ; Liu, Huijuan ; Qu, Jiuhui |
| 刊名 | Engineering; Environmental Sciences & Ecology; Water Resources
 |
| 出版日期 | 2012 |
| 卷号 | 46期号:1页码:73-81 |
| 关键词 | Microcystis aeruginosa KMnO4-Fe(II) process Moderate pre-oxidation The in-situ formed Fe(III) MnO2 Dissolved organic matter |
| ISSN号 | 0043-1354 |
| 中文摘要 | This study developed a novel KMnO4-Fe(II) process to remove the cells of Microcystis aeruginosa, and the mechanisms involved in have been investigated. At KMnO4 doses of 0-10.0 mu M, the KMnO4 Fe(II) process showed 23.4-53.3% higher efficiency than the KMnO4-Fe(III) process did. This was first attributed to the moderate pre-oxidation of M. aeruginosa by KMnO4, achieved by dosing Fe(II) after a period of pre-oxidation, to cease the further release of intracellular organic matter (IOM) and the degradation of dissolved organic matter (DOM). The extensive exposure of M. aeruginosa to KMnO4 in KMnO4-Fe(III) process led to high levels and insufficient molecular weight of DOM, inhibiting the subsequent Fe(III) coagulation. Additionally, Fe(II) contributed to lower levels of the in-situ formed MnO2, the reduction product of KMnO4 which adversely affected algae removal by Fe(III) coagulation. However, the in-situ formed Fe(III), which was derived from the oxidation of Fe(II) by KMnO4, in-situ MnO2, and dissolved oxygen, dominated the remarkably high efficiency of KMnO4-Fe(II) process with respect to the removal of M. aeruginosa. On one hand, in-situ formed Fe(III) had more reactive surface area than pre-formed Fe(III). On the other hand, the continuous introduction of fresh Fe(III) coagulant showed higher efficiency than one-off dosage of coagulant to destabilize M. aeruginosa cells and to increase the flocs size. Moreover, the MnO2 precipitated on algae cell surfaces and contributed to the formation of in-situ formed Fe(III), which may act as bridges to enhance the removal of M. aeruginosa. (C) 2011 Elsevier Ltd. All rights reserved. |
| WOS记录号 | WOS:000298527300008 |
| 公开日期 | 2014-11-28 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/8131]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Ma, Min,Liu, Ruiping,Liu, Huijuan,et al. Effect of moderate pre-oxidation on the removal of Microcystis aeruginosa by KMnO4-Fe(II) process: Significance of the in-situ formed Fe(III)[J]. Engineering; Environmental Sciences & Ecology; Water Resources,2012,46(1):73-81. |
| APA | Ma, Min,Liu, Ruiping,Liu, Huijuan,&Qu, Jiuhui.(2012).Effect of moderate pre-oxidation on the removal of Microcystis aeruginosa by KMnO4-Fe(II) process: Significance of the in-situ formed Fe(III).Engineering; Environmental Sciences & Ecology; Water Resources,46(1),73-81. |
| MLA | Ma, Min,et al."Effect of moderate pre-oxidation on the removal of Microcystis aeruginosa by KMnO4-Fe(II) process: Significance of the in-situ formed Fe(III)".Engineering; Environmental Sciences & Ecology; Water Resources 46.1(2012):73-81. |
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来源：生态环境研究中心
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