Dipartimento di Ingegneria Civile, Design, Edilizia e Ambiente, Seconda Università di Napoli, via Roma, 29, 81031 Aversa (CE), Italy.
J Hazard Mater. 2013 Sep 15;260:914-20. doi: 10.1016/j.jhazmat.2013.06.050. Epub 2013 Jun 28.
In this work, an array of deep passive wells filled with activated carbon, namely a Discontinuous Permeable Adsorptive Barrier (PAB-D), has been proposed for the remediation of an aquifer contaminated by tetrachloroethylene (PCE). The dynamics of the aquifer in the particular PAB-D configuration chosen, including the contaminant transport in the aquifer and the adsorption onto the barrier material, has been accurately performed by means of a computer code which allows describing all the phenomena occurring in the aquifer, simultaneously. A PAB-D design procedure is presented and the main dimensions of the barrier (number and position of passive wells) have been evaluated. Numerical simulations have been carried out over a long time span to follow the contaminant plume and to assess the effectiveness of the remediation method proposed. The model results show that this PAB-D design allows for a complete remediation of the aquifer under a natural hydraulic gradient, the PCE concentrations flowing out of the barrier being always lower than the corresponding Italian regulation limit. Finally, the results have been compared with those obtained for the design of a more traditional continuous barrier (PAB-C) for the same remediation process.
在这项工作中，提出了一种由充满活性炭的深被动井组成的阵列，即不连续可渗透吸附屏障 (PAB-D)，用于修复受四氯乙烯 (PCE) 污染的含水层。通过一个计算机程序，可以精确地模拟所选特定 PAB-D 配置中的含水层动态，包括含水层中的污染物运移和对屏障材料的吸附。该程序提出了一种 PAB-D 设计程序，并评估了屏障的主要尺寸（被动井的数量和位置）。进行了长时间的数值模拟，以跟踪污染物羽流并评估所提出的修复方法的有效性。模型结果表明，这种 PAB-D 设计允许在自然水力梯度下完全修复含水层，从屏障中流出的 PCE 浓度始终低于意大利相应的规定限值。最后，将结果与相同修复过程中设计更传统的连续屏障 (PAB-C) 的结果进行了比较。
