Laboratory evaluation of custom-designed surfactants to remediate NAPL source zones.
Laboratory evaluation of custom-designed surfactants to remediate NAPL source zones.
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用于修复 NAPL 源区的定制表面活性剂的实验室评估。
DOI：
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发表时间：
2002
影响因子：
11.4
通讯作者：
G. Pope
中科院分区：
文献类型：
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作者：
S. Jayanti;L. Britton;V. Dwarakanath;G. Pope
使用定制设计的阴离子表面活性剂，支链醇丙氧基化硫酸盐，进行实验室柱研究，以评估其有效性，从渥太华砂和现场冲积层去除非水相液体（NAPLs）。在11至50摄氏度的温度范围内测试了表面活性剂对污染物如四氯乙烯（PCE）、风化汽油和海军特种燃料油的功效。已经表明，使用支化醇丙氧基化硫酸盐可以实现非常低的最终NAPL饱和度，即使是柠檬酸NAPL，同时表现出低的诱导水力梯度、低的微乳液粘度和在污染的田间土壤上的最小吸附。这些定制设计的表面活性剂对致密NAPL（DNAPL）和轻质NAPL都有效。最后，这些表面活性剂被用来创建与PCE DNAPL中性浮力微乳液。实验室实验表明，这些定制设计的高性能表面活性剂可以定制，以优化特定领域NAPL的污染物溶解度。
Laboratory column studies were conducted using custom-designed anionic surfactants, the branched alcohol propoxylated sulfates, to evaluate their effectiveness in removing nonaqueous phase liquids (NAPLs) from both Ottawa sand and field alluvium. Surfactant efficacy was tested at temperatures ranging between 11 and 50 degrees C for contaminants such as tetrachloroethene (PCE), weathered gasoline, and Naval Special Fuel Oil. It has been shown that use of branched alcohol propoxylated sulfates can achieve very low final NAPL saturations even with recalcitrant NAPLs, while exhibiting low induced hydraulic gradients, low microemulsion viscosity, and minimal sorption on contaminated field soils. These custom-designed surfactants are effective with both dense NAPLs (DNAPLs) and light NAPLs. Finally, these surfactants were used to create neutrally buoyant microemulsions with a PCE DNAPL. The laboratory experiments show that these custom-designed, high-performance surfactants can be tailored to optimize contaminant solubility for specific field NAPLs.