| 锶在不同水流速度下的迁移规律探究 |
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| 引用本文： | 郝军停,霍丽娟,李一菲,钱天伟.锶在不同水流速度下的迁移规律探究[J].环境科学与技术,2012(12):154-158. |
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| 作者姓名： | 郝军停 霍丽娟 李一菲 钱天伟 |
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| 作者单位： | 太原科技大学 |
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| 基金项目： | 国家自然科学基金资助项目(40872199);山西省自然科学基金(2010021012-0) |
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| 摘 要： | 为研究水流速度对土壤中锶迁移的影响,设计室内易混合置换实验,获得了饱和黄土土柱中不同水流速度条件下溴的穿透曲线及锶的垂直分布曲线,并用CXTFIT2.1软件对其参数进行拟合。实验结果表明:在本实验条件下,黄土对锶有很强的吸附能力,阻滞系数(Rd)均在170以上,而且不为常数;对于锶在垂直土柱中的迁移,可用两点模型描述;随着垂直土柱的水流速度的增大,锶的阻滞系数Rd越来越小,表明更高的水流速度促进了Sr在土壤中的迁移。因此,用不变的阻滞系数描述锶在介质中的迁移是不恰当,一旦外界环境发生改变,锶的阻滞系数也会发生相应的变化。在水流速度不定的情况下,不能采用某一个固定的阻滞系数作为计算的标准。
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| 关 键 词： | 黄土 锶 流速 阻滞系数 |
Regular Pattern of Strontium Migration in Water with Varied Flow Velocities |
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| HAO Jun-ting,HUO Li-juan,LI Yi-fei,QIAN Tian-wei.Regular Pattern of Strontium Migration in Water with Varied Flow Velocities[J].Environmental Science and Technology,2012(12):154-158. |
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| Authors: | HAO Jun-ting HUO Li-juan LI Yi-fei QIAN Tian-wei |
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| Institution: | (Taiyuan University of Science and Technology,Taiyuan 030024,China) |
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| Abstract: | Strontium as a radionuclide was studied in terms of its migration in soil.This paper described a miscible displacement experimental column,filled with loess and sprayed with water,with which the effect of water velocity on Sr migration was investigated.Breakthrough curves of bromide(BTC) and the vertical profiles of Sr concentration were obtained under the condition of saturated loess and various velocities of water flow.With the help of software CXTFIT2.1 the values of retardation factor(Rd) and the relevant parameters were determined.The experimental results indicated a very strong Sr adsorption ability of loess and that Rd,which was changeable depending on the externals,decreased with the increase of water flow velocity therefore promoting Sr migration in soil. |
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| Keywords: | loess strontium flow velocity retardation factor |
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