| 饱和多孔介质中高岭石胶体和SiO2胶体运移行为比较 |
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| 引用本文： | 刘庆玲,徐绍辉,刘建立.饱和多孔介质中高岭石胶体和SiO2胶体运移行为比较[J].土壤学报,2008,45(3):445-451. |
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| 作者姓名： | 刘庆玲 徐绍辉 刘建立 |
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| 作者单位： | 1. 中国科学院南京土壤研究所,南京,210008
2. 青岛大学环境科学与工程系,山东青岛,266071 |
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| 摘 要： | 胶体在多孔介质中的运移行为不仅取决于胶体本身的性质,同时还受到溶液离子强度、孔隙水流速等物理、化学因素的影响。本文通过室内饱和石英砂柱出流实验,探讨了高岭石胶体(Kaolinite胶体)和SiO2胶体在不同离子强度(0.001 5,0.01和0.03 mol L-1)和平均孔隙流速(约20和5 cm h-1)作用下的迁移行为。结果表明,随溶液离子强度增加,Kaolinite胶体和SiO2胶体的沉淀量增加;平均孔隙水流速的增加则会促进Kaolinite胶体和SiO2胶体的运移。同时还表明,离子强度和流速变化对粒径较大的Kaolinite胶体运移的影响要显著大于SiO2胶体。研究结果有助于加深胶体对污染物运移的促进机制的理解,同时对全面、客观评价地下环境的污染风险具有一定的指导意义。
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| 关 键 词： | Kaolinite胶体 SiO2胶体 运移 多孔介质 |
| 收稿时间： | 2007/3/22 0:00:00 |
| 修稿时间： | 2007年3月22日 |
COMPARISON BETWEEN KAOLINITE AND SiO2 COLLOID IN TRANSPORT BEHAVIOR IN SATURATED POROUS MEDIA |
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| Liu Qingling,Xu Shaohui and Liu Jianli.COMPARISON BETWEEN KAOLINITE AND SiO2 COLLOID IN TRANSPORT BEHAVIOR IN SATURATED POROUS MEDIA[J].Acta Pedologica Sinica,2008,45(3):445-451. |
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| Authors: | Liu Qingling Xu Shaohui and Liu Jianli |
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| Institution: | 1 (1 Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China) (2 Department of Environmental Science and Engineering,Qingdao University,Qingdao,Shandong 266071,China) |
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| Abstract: | Colloid transport in porous media is controlled,to a large extent,by surface properties of the colloid per se and physical and chemical factors,like ionic strength,pore water velocity,etc.An outflow experiment using saturated quartz column was conducted and designed to have three level of ionic-strength(i.e.0.001 5,0.01 and 0.03 mol L-1) and two pore water velocities(i.e.21 and 5 cm h-1) to analyze deposition and transport process of Kaolinite and SiO2.Results show that deposition processes of Kaolinite and... |
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| Keywords: | Kaolinite SiO2 Transport Porous media |
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