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首页> 外文期刊>Soil Science Society of America Journal >The Influence of Two Surfactants on Infiltration into a Water-Repellent Soil
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The Influence of Two Surfactants on Infiltration into a Water-Repellent Soil

机译：两种表面活性剂对憎水土壤入渗的影响

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摘要

Water-repellency which affects infiltration, evaporation, erosion, and other water transfer mechanisms through soil has been observed under several natural conditions throughout the world. Surfactants can be used to mitigate the consequences of soil water repellency. The infiltration rates of two surfactants applied at concentrations of 500, 1000, 3000, and 5000 mg L-1 were measured on laboratory columns of sand treated to create a stable water-repellent system. All of these surfactant solutions had a surface tension equal to 0.035 N m-1. Drop-penetration times (DPT) of these solutions were also measured for these solutions. An aqueous ethanol solution with an identical surface tension as the surfactant solutions was also used. The DPT decreased and the infiltration rate increased as the surfactant solution concentration increased. The results are explained by adsorption of surfactant which caused an increase in surface tension of the solution. Adsorption of surfactants enhanced soil rewetting so that treated columns that were dried had high subsequent infiltration rates with water. Because the adsorption of surfactants greatly affects infiltration, prescription of surfactant treatment on a theoretical basis is not feasible. Although some basic concepts can be established, the utility of surfactants in managing water repellent systems will depend on empirical observations.
机译：在世界范围内的几种自然条件下，已经观察到憎水性会影响通过土壤的渗透，蒸发，侵蚀， 和其他水传递机制。表面活性剂 可用于减轻土壤疏水性的影响。 两种表面活性剂在浓度 为500、1000、3000，在经过实验室处理的沙柱上测定5000 mg L -1 ，以建立稳定的疏水系统。所有这些表面活性剂溶液均具有表面张力等于或等于0.035 N m -1 。还测量了这些解决方案的这些溶液 的液滴渗透时间（DPT）。还使用了表面张力与表面活性剂溶液 相同的乙醇水溶液 。随着表面活性剂溶液浓度的增加，DPT降低，浸润速率增加 。结果 通过表面活性剂的吸附来解释，该表面活性剂引起溶液表面张力的增加。表面活性剂 的吸附增强了土壤的湿润性，因此干燥后的处理过的色谱柱随后具有较高的水渗透率。由于表面活性剂的 吸附会极大地影响渗透，因此从理论上讲，对表面活性剂进行处理的处方 是不可行的。 尽管可以建立一些基本概念，表面活性剂在管理防水系统中的效用 取决于经验观察。

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  • 来源
    《Soil Science Society of America Journal》 |2002年第2期|361-367|共7页
  • 作者

    G. L. Feng; J. Letey; L. Wu;

  • 作者单位

    Department of Environmental Sciences, Soil and Water Science Unit, University of California, Riverside, CA 92521;

    Department of Environmental Sciences, Soil and Water Science Unit, University of California, Riverside, CA 92521;

    Department of Environmental Sciences, Soil and Water Science Unit, University of California, Riverside, CA 92521;

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