Hill E H, Moutier M, Alfaro J, Miller C T
Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, North Carolina 27599-7400, USA.
Environ Sci Technol. 2001 Jul 15;35(14):3031-9. doi: 10.1021/es001891d.
Although dense nonaqueous phase liquid (DNAPL) pools are an important source of groundwater contamination, little experimental data have been generated to develop a mature level of understanding of the problem, and few strategies specifically aimed at remediation have been advanced. We discuss the dominant importance of these features in subsurface systems, present novel two- and three-dimensional heterogeneous experimental systems, and show results from two evolving strategies for remediating DNAPL pools. These strategies involve the joint use of a dense brine barrier and controlled mobilization of trapped DNAPL using small-volume surfactant flushes. These experiments demonstrate a controlled, substantial reduction of entrapped DNAPL in both two- and three-dimensional heterogeneous domains, using less than a single pore volume of flushing solution in some cases.
尽管致密非水相液体（DNAPL）池是地下水污染的一个重要来源，但为深入理解该问题而产生的实验数据很少，专门针对修复的策略也很少被提出。我们讨论了这些特征在地下系统中的主导重要性，展示了新颖的二维和三维非均质实验系统，并给出了两种修复DNAPL池的不断发展的策略的结果。这些策略包括联合使用浓盐水屏障以及使用小体积表面活性剂冲洗液来控制被困DNAPL的迁移。这些实验表明，在二维和三维非均质区域中，使用不到一个孔隙体积的冲洗液，就能实现对被困DNAPL的可控且大幅减少。
