| 引用本文: | 陆贻超,王国祥,李仁辉.超声波和改性粘土集成技术在去除蓝藻水华上的应用.湖泊科学,2010,22(3):421-429. DOI:10.18307/2010.0316 |
| LU Yichao,WANG Guoxiang,LI Renhui.Using the integrated technique of ultrasonic and modified-clay to remove algal blooms. J. Lake Sci.2010,22(3):421-429. DOI:10.18307/2010.0316 |
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| 摘要: |
| 近年来,改性粘土除藻技术广泛应用于"水华"的治理当中,其原理是藻类与改性粘土絮凝后自然沉降.通过对铜绿微囊藻(Microcystis aeruginosa)、集胞藻(Synechocystis sp.)和小球藻(Chlorella vulgaris)的絮凝比较,发现具气囊的铜绿微囊藻比其他两种藻发生再悬浮的幅度更大,次数更多.针对我国的水华藻类是以微囊藻(Microcystis sp.)等为主的情况,研究超声波和改性粘土集成技术对藻类的去除效果.结果表明,超声波和改性粘土集成技术能将藻类去除率明显提高,该法的絮体稳定性比单一絮凝法明显增强,且对群体形态的藻的去除率提升效果更好.另外,在40kHz、160W超声辐照下,铜绿微囊藻的气囊去除率在95%以上,但细胞壁保持完好,细胞活性不变,藻毒素不会因细胞破裂而释放,因此超声波和改性粘土集成方法,是治理我国蓝藻水华的有效方法. |
| 关键词: 铜绿微囊藻 超声波 改性粘土 絮凝 气囊 再悬浮 水华去除 |
| DOI：10.18307/2010.0316 |
| 分类号: |
| 基金项目:国家科技重大专项项目(2008ZX07105-006);中国科学院项目(082303-1-501)联合资助 |
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| Using the integrated technique of ultrasonic and modified-clay to remove algal blooms |
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LU Yichao1,2, WANG Guoxiang1, LI Renhui2
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1.Jiangsu Key Laboratory of Environmental Change and Ecological Construction, College of Geographical Science, Nanjing Normal University, Nanjing 210046, P. R. China;2.Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China
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| Abstract: |
| The technique of the modified-clay to control algal blooms has been widely applied, and removal of algal cells can be done through the flocculation of cells with modified-clay. Microcysti.s aerugiaosa, a primary water bloom forming cyanobacteria with the gas vesicle, was shown to resuspend more frequently than non-gas vesicle algae,Synechocystis sp. and Chlorelln vulgaris. The purpose of this paper was to study the integrated technique of ultrasonic treatment and the modified-clay to remove algal blooms,based on the fact that the main bloom-forming species in Chinese waters are Microcystis spp. with gas vesicle. The results showed that the integrated technique could greatly increase the efl-ciency of algal removal, especially removal of colony form of M.nosa. 160W ultrasonic power and 40 kHz ultrasonic frequency were found to maintain cyanobacterial cell wall and cell viability un-changed, and therefore the release of algal toxins caused by cellular decomposition were avoided. |
| Key words: Microcystis neruginosa ultrasonic modified-clay flocculation gas vesicle resuspension algal bloom removal |
