Micromodel Study of Surfactant Foam Remediation of Residual Trichloroethylene
Micromodel Study of Surfactant Foam Remediation of Residual Trichloroethylene
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DOI：
10.1021/es9910558
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发表时间：
2000-07
影响因子：
11.4
通讯作者：
Seung-Woo Jeong;M. Corapcioglu;Sharon E. Roosevelt
中科院分区：
文献类型：
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作者：
Seung-Woo Jeong;M. Corapcioglu;Sharon E. Roosevelt
利用微观模型研究了表面活性剂泡沫(SF)的修复技术，以期改善污染物的置换。剩余的三氯乙烯(TCE)饱和度被放置在其他水饱和的微观模型中。将空气引入表面活性剂溶液流动中(C14-16烯烃磺酸钠2%(W))，以获得表面活性剂冲洗中常用的SF。还采用了传统的修复策略，如表面活性剂冲洗、注水和气体驱，以与SF驱油进行比较。通过用图像分析仪直接测量剩余的TCE斑点面积来量化去除效率。微观模型可视化显示，与单独使用表面活性剂溶液相比，SF能够置换更多的TCE。SF驱油去除99%的残留TCE，而表面活性剂冲洗去除41%，25孔体积的相同表面活性剂溶液。基于微观模型可视化，所产生的强化去除三氯乙烯气泡的延迟。
A remediation technique involving surfactant foam (SF) was investigated by using a micromodel with a view toward improved contaminant displacement. A residual trichloroethylene (TCE) saturation was emplaced in an otherwise water-saturated micromodel. Air flow was introduced to a surfactant solution flow (Sodium C14-16 olefin sulfonate 2%(w)) commonly utilized in surfactant flushing to obtain the SF. Conventional remediation strategies, surfactant flushing, water flooding, and gas flooding were also employed for comparison to the SF flooding. The removal efficiency was quantified by directly measuring the remaining TCE blob area with an image analyzer. The micromodel visualization showed that the SF is capable of displacing a higher amount of TCE as compared to surfactant solution alone. The SF flooding removed 99% of the residual TCE, while surfactant flushing removed 41% with 25 pore volumes of the same surfactant solution. Based on micromodel visualization, the resulting enhanced removal of TCE blobs du...