Novel methods for measuring air-water interfacial area in unsaturated porous media.
Novel methods for measuring air-water interfacial area in unsaturated porous media.
复制标题
测量不饱和多孔介质中空气-水界面面积的新方法。
DOI：
10.1016/j.chemosphere.2015.01.029
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发表时间：
2015-05
期刊：
影响因子：
8.8
通讯作者：
Zhong H
中科院分区：
文献类型：
--
作者：
Brusseau ML;El Ouni A;Araujo JB;Zhong H
界面分配示踪试验（IPTT）是测量非饱和多孔介质气-水界面面积的一种方法。标准IPTT方法涉及进行测试，其中在不饱和流动条件下将表面活性剂水溶液引入填充柱中。在某些情况下，观察到该方法会发生表面张力引起的排水，这会使数据分析复杂化，并给测量值带来不确定性。本文提出了两种用于进行IPTT的新的替代方法，其部分设计用于防止地表水引起的排水。这两种方法被称为双表面活性剂IPTT（IPTT-DS）和残余空气IPTT（IPTT-RA）。用这两种方法测量了两种天然多孔介质的气-水界面面积。测试期间的系统监测显示，没有可测量的地表水引起的排水。测得的界面面积相比，以及与标准的IPTT方法进行这样的方式，防止表面的诱导排水所获得的。
Interfacial partitioning tracer tests (IPTT) are used to measure air-water interfacial area for unsaturated porous media. The standard IPTT method involves conducting tests wherein an aqueous surfactant solution is introduced into a packed column under unsaturated flow conditions. Surfactant-induced drainage has been observed to occur for this method in some cases, which can complicate data analysis and impart uncertainty to the measured values. Two novel alternative approaches for conducting IPTTs are presented herein that are designed in part to prevent surfactant-induced drainage. The two methods are termed the dual-surfactant IPTT (IPTT-DS) and the residual-air IPTT (IPTT-RA). The two methods were used to measure air-water interfacial areas for two natural porous media. System monitoring during the tests revealed no measurable surfactant-induced drainage. The measured interfacial areas compared well to those obtained with the standard IPTT method conducted in such a manner that surfactant-induced drainage was prevented.
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11.4
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