In this study, a numerical model was developed to predict perfluorooctane sulfonate (PFOS) migration in a contaminated site due to precipitation and evapotranspiration over 100 years. The soil physicochemical properties including sorption isotherm characteristics were used to model PFOS transport (advection and dispersion), and attenuation (adsorption and decay) processes using the GeoStudio software. The model was calibrated using the results of a leachate test on a reconstituted contaminated soil specimen. The simulation of the contaminated site showed that in the current situation where the site is covered by a concrete slab, PFOS remains at the site beneath the concrete slab for a long time with decay being the dominant factor contributing to its reduction over time. It took several decades for PFOS to contaminate groundwater. The PFOS level in groundwater reached the threshold value for drinking water in 25 years and continued to increase in the long term, extending horizontally to an area up to five times the size of the contaminated site. This issue needs to be considered when digging boreholes for drinking water close to the contaminated site.

在这项研究中，开发了一个数值模型来预测全氟辛烷磺酸盐（PFOS）在100年内由于降水和蒸散作用而在受污染地点的迁移。使用GeoStudio软件，将土壤物理化学性质（包括吸附等温线特征）用于模拟PFOS的迁移（对流和分散）以及衰减（吸附和衰减）过程。使用渗滤液测试的结果对重构的污染土壤标本进行模型校准。对受污染场地的模拟表明，在场地被混凝土板覆盖的当前情况下，全氟辛烷磺酸会长时间停留在混凝土板下方的场地，而腐烂是导致其随时间减少的主要因素。全氟辛烷磺酸花了数十年时间污染了地下水。地下水中的全氟辛烷磺酸水平在25年内达到饮用水的阈值，并在长期内持续增加，水平延伸至受污染场地面积的五倍。在靠近受污染场地的地方挖饮用水钻孔时，需要考虑这个问题。