Measuring air-water interfacial area for soils using the mass balance surfactant-tracer method.

Measuring air-water interfacial area for soils using the mass balance surfactant-tracer method.
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DOI:
10.1016/j.chemosphere.2015.04.035
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发表时间:
2015-09
期刊:
影响因子:
8.8
通讯作者:
Brusseau ML
Brusseau ML
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Araujo JB;Mainhagu J;Brusseau ML

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有几种方法进行界面分配示踪剂测试,以测量空气-水在多孔介质中的界面面积。一种这样的方法是质量平衡表面活性剂示踪法。与其他基于示踪剂的方法相比,质量平衡方法的优点在于,单个测试可以在宽范围的水饱和度上产生多个界面面积测量值。迄今为止,质量平衡法仅用于玻璃珠或处理过的石英砂。本研究的目的是探讨质量平衡法应用于更复杂的多孔介质的有效性和可实施性。结果表明,用质量平衡法测得的界面面积与用位移法测得的值一致。这包括土壤的结果,其中固相吸附是总示踪剂保留的重要组成部分。
There are several methods for conducting interfacial partitioning tracer tests to measure air-water interfacial area in porous media. One such approach is the mass balance surfactant tracer method. An advantage of the mass-balance method compared to other tracer-based methods is that a single test can produce multiple interfacial area measurements over a wide range of water saturations. The mass-balance method has been used to date only for glass beads or treated quartz sand. The purpose of this research is to investigate the effectiveness and implementability of the mass-balance method for application to more complex porous media. The results indicate that interfacial areas measured with the mass-balance method are consistent with values obtained with the miscible-displacement method. This includes results for a soil, for which solid-phase adsorption was a significant component of total tracer retention.
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