多孔介质中表面活性剂增强土壤冲洗过程中乳化液粘度的影响

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 1997-07-01 DOI:10.1080/15320389709383572

S. C. Crawford, C. Bruell, D. Ryan, John W. Duggan

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引用次数: 18

摘要

表面活性剂可以潜在地提高泵送处理技术在修复被非水相液体(NAPLs)污染的含水层中的效率。然而，在去除过程中形成的乳剂会增加体系的粘度。这可能导致孔隙堵塞和流量减少，从而抑制污染物的去除过程。在先前的研究中，粘性乳剂的形成已被确定为使用表面活性剂增强土壤冲洗技术的现场测试失败的可能原因之一。然而，原位乳化和粘度增加的影响以前没有被量化。本文的目的是研究原位乳化对修复过程的影响。实验室柱式研究使用1%乙醇乙氧基酸表面活性剂溶液(Witconol®SN90)从多孔介质中动员间二甲苯。测定了原位乳化的效果。玻璃柱(直径1.1 cm × 30 cm)填充…

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Effects of emulsion viscosity during surfactant‐enhanced soil flushing in porous media

Surfactants can potentially improve the efficiency of pump‐and‐treat technology for remediation of aquifers contaminated by nonaqueous phase liquids (NAPLs). However, the formation of emulsions during the removal process can Increase the viscosity in the system. This can result in pore clogging and reduction of flow, which inhibits the contaminant removal process. Formation of viscous emulsions has been identified in previous research as one of the probable causes for in situ field test failures using surfactant‐enhanced soil‐flushing technology. However, the effects of in situ emulsification and viscosity increases have not been quantified previously. The purpose of this article is to investigate effects of in situ emulsification on the remediation process. Laboratory column studies examined the mobilization of m‐xylene from porous media using a 1% alcohol ethoxylate surfactant solution (Witconol® SN90). Effects of in situ emulsification were determined. Glass columns (1.1 cm i.d. × 30 cm) were packed wi...

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.