The contaminant transport of perfluorooctane sulfonate (PFOS) through the base of a municipal solid waste landfill lined by a single composite liner comprised of a geomembrane over a geosynthetic clay liner (GCL) and a 3.75 m-thick attenuation layer underlain by an aquifer is examined. Both pure diffusive transport and advective transport through holed wrinkles are modelled. The peak concentrations of PFOS predicted for the aquifer beneath the landfill are compared to the maximum allowable PFOS concentration established by Australia, Canada, Europe, and various US states. The results show that (a) in most cases with zero leakage and pure diffusive transport, regulatory limits are met; however, (b) if there are holed wrinkles in the geomembrane, the impact is highly dependent on the length of holed wrinkle per hectare, the geomembrane-GCL interface transmissivity, and the GCL hydraulic conductivity. Factors affecting the length of holed wrinkles are discussed. In many of the cases examined, the peak concentrations of PFOS in the aquifer exceed the limits set by the different jurisdictions, indicating that a single composite liner may not be sufficient to contain PFOS acceptable level and recommends that realistic contaminant impact calculations be performed in each specific case.

检查了全氟辛烷磺酸 (PFOS) 通过城市固体垃圾填埋场底部的污染物传输，该垃圾填埋场由单个复合衬里组成，该衬里由土工合成粘土衬里 (GCL) 上的土工膜和含水层下方的 3.75 m 厚衰减层组成. 模拟了通过有孔皱纹的纯扩散传输和平流传输。将垃圾填埋场下方含水层预测的 PFOS 峰值浓度与澳大利亚、加拿大、欧洲和美国各州规定的最大允许 PFOS 浓度进行比较。结果表明 (a) 在大多数情况下，零泄漏和纯扩散传输，符合法规限制；然而，(b) 如果土工膜上有孔状皱纹，其影响很大程度上取决于每公顷孔状皱纹的长度，土工膜-GCL 界面透水率和 GCL 水力传导率。讨论了影响有孔皱纹长度的因素。在许多检查的案例中，含水层中 PFOS 的峰值浓度超过了不同司法管辖区设定的限制，这表明单个复合衬里可能不足以包含 PFOS 可接受的水平，并建议在每个区域进行实际的污染物影响计算。具体案例。