| 引用本文: | 殷娣娣,陆纳新,袁君,高乃云,戎文磊,周圣东.不同预氧化剂对铜绿微囊藻细胞的灭活[J].哈尔滨工业大学学报,2015,47(2):74.DOI:10.11918/j.issn.0367-6234.2015.02.014 |
| YIN Didi,LU Naxin,YUAN Jun,GAO Naiyun,RONG Wenlei,ZHOU Shengdong.Inactivation of Microcystis aeruginosa by different pre-oxidants[J].Journal of Harbin Institute of Technology,2015,47(2):74.DOI:10.11918/j.issn.0367-6234.2015.02.014 |
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| 摘要: |
| 为比较不同预氧化剂对藻细胞的处理效果及其机理,在高锰酸钾灭活藻细胞研究的基础上,采用次氯酸钠与臭氧对铜绿微囊藻进行灭活实验．结果表明:次氯酸钠和臭氧对藻类的灭活反应均符合二级动力学模型;次氯酸钠较易引起铜绿微囊藻细胞萎缩破裂,从而导致细胞内代谢有机质的释放,对藻细胞的灭活动力学常数为(220±3) L·mol-1·s-1,不同初始次氯酸钠浓度对动力学常数无明显影响;臭氧对于铜绿微囊藻细胞有极强的氧化作用,细胞灭活速率常数达(2 655±15) L·mol-1·s-1,能迅速引起藻细胞破裂及胞内代谢有机质的释放,不同初始臭氧浓度对动力学常数无明显影响．3种氧化剂对铜绿微囊藻细胞的灭活速率由大到小依次为: 臭氧>次氯酸钠>高锰酸钾．电镜扫描结果显示,臭氧与次氯酸钠在氧化过程中比高锰酸钾更易引起藻细胞破裂及IOM的释放． |
| 关键词: 预氧化 铜绿微囊藻 动力学常数 藻活性 释放 |
| DOI：10.11918/j.issn.0367-6234.2015.02.014 |
| 分类号:TU991 |
| 基金项目:国家自然科学基金(51178321);国家科技重大专项(2012ZX07403-001;2008ZX07421-002);高等学校博士点基金(20120072110050); 住房和城乡建设部研究开发项目(2009-K7-4). |
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| Inactivation of Microcystis aeruginosa by different pre-oxidants |
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YIN Didi1, LU Naxin2, YUAN Jun2, GAO Naiyun1,RONG Wenlei2, ZHOU Shengdong2
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(1. Pollution Control and Resource Reuse State Key Laboratory(Tongji University), 200092 Shanghai, China; 2. Wuxi Water Works Co., Ltd, 214031 Wuxi, Jiangsu, China)
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| Abstract: |
| Comparison of the treatment effect and mechanisms of different preoxidants on algal cells were analyzed by the experiments of inactivation of M. aeruginosa with potassium permanganate, ozone and sodium hypochlorite. The results showed that the decrease of quantum yield of M. aeruginosa caused by chlorination and ozonation both followed second-order kinetics. Sodium hypochlorite caused the cell lysis with the quantum yield rate constant of (220±3) L·mol-1·s-1 and resulted in the release of intracellular organic matter(IOM) regardless of initial concentration. Ozone had a profound oxidation effect on M. aeruginosa cells and would rapidly cause the cell lysis with the rate constant of (2 655±15) L·mol-1·s-1regardless of the initial ozone dosages. The sequence of the quantum yield rate constants of three oxidations was O3>NaClO>KMnO4. However, both ozone and sodium hypochlorite caused the cell lysis and led to the release of IOM more easily than potassium permanganate, which was suggested by the results of scanning electron microscopy. |
| Key words: pre-oxidation Microcystis aeruginosa second-order kinetics algal activity release |
