LABORATORY DETERMINATION OF DIFFUSION AND DISTRIBUTION COEFFICIENTS OF CONTAMINANTS USING UNDISTURBED CLAYEY SOIL
LABORATORY DETERMINATION OF DIFFUSION AND DISTRIBUTION COEFFICIENTS OF CONTAMINANTS USING UNDISTURBED CLAYEY SOIL
复制标题
使用原状粘土实验室测定污染物的扩散和分布系数
DOI：
10.1139/t88-011
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发表时间：
1988
影响因子：
3.6
通讯作者：
F. Barone
中科院分区：
文献类型：
--
作者：
R. K. Rowe;Chris J. Caers;F. Barone
本文介绍了一种利用饱和、完整(原状)粘性土样测定污染物扩散系数和分配系数的技术。这项技术的说明参考了一些实验室测试，这些测试涉及潜在污染物通过来自安大略省萨尼亚的完整粘土的平流-扩散迁移。提出的技术的一个重要方面是系统中的污染物质量保持不变，因此在每次测试期间都会显著降低源渗滤液的浓度。用一个简单的理论模型对这种情况进行了分析，结果表明，这种现象可以从一次试验中同时推导出扩散系数和分配/分配系数。推导了从萨尼亚地区通过粘土的一些盐溶液的参数。在这些试验的基础上，建议对于萨尼亚土壤和平流速度最大值(0.035 m/a)，…
This paper describes a technique for determining the diffusion coefficient and the distribution coefficient for contaminants using saturated, intact (undisturbed) clayey soil samples. The technique is illustrated with reference to a number of laboratory tests involving advective-diffusive migration of potential contaminants through an intact clayey soil from Sarnia, Ontario. An important aspect of the proposed technique is that the mass of contaminant in the system is kept constant and so significant decrease in source leachate concentration occurs during each test. A simple theoretical model is used to analyze this case and it is shown that this phenomenon can be used to deduce both the diffusion coefficient and the distribution/partitioning coefficient from a single test. Parameters are deduced for a number of salt solutions passing through the clay from the Sarnia area. On the basis of these tests it is suggested that for the Sarnia soil and advective velocities up to the maximum examined (0.035 m/a), ...