Infiltration systems are increasingly used to reduce peak flows and mitigate the impacts of stormwater runoff. Despite the benefits of infiltration systems, there is a risk for associated pollutants, including heavy metals to be introduced to the underlying soil and groundwater. The subsequent movement of metals in the subsurface and their potential to contaminate water resources is uncertain and profoundly depends on the adsorptive behavior of the surrounding soil. We used two soil types, one natural (quartz–kaolinite–muscovite) and one synthetic (quartz and kaolinite only) with different clay mineralogy to test their potential adsorptive capacities through batch systems, with Zn(II) as a representative tracer. Nonlinear isotherms, Freundlich and Langmuir, provided good fits with the experimental sorption data. Kinetic data were well fitted by a pseudo-second-order model, indicating that cation exchange exists between the clay surfaces and Zn(II) in the liquid phase. We found that the natural soil adsorbed far more Zn(II) when compared to the synthetic soil which was attributed to the presence of the muscovite in the natural soil. Comparison of the observed adsorption capacity of the two soils with their predicted adsorption capacities showed that while the adsorption capacities of the single-sized clay minerals are widely reported, these values cannot be linearly extrapolated to estimate the adsorption capacity of a soil that might contain varied fractions of clay. The results suggest that the designers of infiltration systems should first undertake an analysis of clay mineralogy of the subsurface soil to better predict the fate of heavy metals within the surrounding soils.

越来越多地使用渗透系统来减少峰值流量并减轻雨水径流的影响。尽管有渗透系统的好处，但仍有可能将相关污染物（包括重金属）引入潜在的土壤和地下水中。金属在地下的后续运动及其污染水资源的潜力尚不确定，并且在很大程度上取决于周围土壤的吸附行为。我们使用两种土壤类型，一种是天然的（石英-高岭石-白云母），另一种是合成的（仅石英和高岭石），具有不同的粘土矿物学特性，以Zn（II）为代表的示踪剂通过批处理系统测试了其潜在的吸附能力。非线性等温线，Freundlich和Langmuir，与实验吸附数据非常吻合。动力学数据通过拟二阶模型很好地拟合，表明在液相中粘土表面和Zn（II）之间存在阳离子交换。我们发现，与合成土壤相比，天然土壤吸附的锌（II）得多，这归因于天然土壤中白云母的存在。将两种土壤的吸附能力与其预测的吸附能力进行比较，结果表明，虽然单一尺寸粘土矿物的吸附能力得到了广泛报道，但这些值不能线性外推以估算可能包含不同含量的土壤的吸附能力。黏土的分数。