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首页> 外文期刊>Journal of Hazardous Materials >One-dimensional solute transport in stratified sands at short travel distances
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One-dimensional solute transport in stratified sands at short travel distances

机译：短距离内分层砂中的一维溶质运移

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This paper presents laboratory-scale experimental observations on the migration of a non-reactive pollutant, sodium chloride, through stratified sands at short travel distances under one-dimensional flow conditions. Sand stratifications, perpendicular, parallel and inclined to the main flow direction, were used and contrary to most other published research work, flow was forced through the stratifications at a constant mean pore water velocity. The paper therefore examines the isolated effects of the different dispersion properties and particle size distribution of the sands used on their dispersion behaviour in different stratification configurations under the specified flow conditions. The initial part of the work on homogeneous sands produced differences in the dispersion which was found to be particle size distribution- and volume-dependent. For the stratified configurations and for the same volume of soil, the results showed different dispersion behaviour at the outflow position depending on the type of stratification and the sequence of the sands within each stratification. The paper presented a picture of the effect of various soils and flow conditions imposed on the transport of the solute and provided useful data on the profile of solute concentration for remediation purposes.
机译：本文介绍了在一维流动条件下，非反应性污染物氯化钠在短距离内通过分层砂的迁移过程的实验室规模实验观察。使用垂直于，平行于且倾斜于主要流动方向的砂岩分层，并且与大多数其他已发表的研究工作相反，迫使流动以恒定的平均孔隙水速度通过分层。因此，本文研究了在指定的流动条件下，不同的分散特性和所用砂的粒度分布对其在不同分层配置中的分散行为的孤立影响。在均质砂土上进行的工作的最初部分在分散体上产生差异，发现该差异取决于粒度分布和体积。对于分层构型和相同体积的土壤，结果显示出流出位置的分散行为不同，这取决于分层的类型和每个分层内的砂层顺序。该文件展示了各种土壤和流动条件对溶质运移的影响，并提供了用于补救目的的溶质浓度分布图的有用数据。

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