Because roofs represent a major part of the urban impervious surface, it is hypothesized that roof runoff is an important source of urban stormwater contamination. However, the contribution of different roofing materials to this contamination has only been examined to a limited extent. In this study, a resource and time efficient methodology, which uses some of the principles of a standardized leaching test (CEN/TS16637-2), was developed to identify material-pollutant relationships for sixteen commonly used roofing materials (EPDM, PVC, TPO, EVA, PU and bitumen membranes). Metals were detected in concentrations ranging from several μg/L in the leachate of synthetic materials up to 2.5 mg/L for Zn in the leachate of EPDM materials. Cd and Cr were not detected in any of the leachates. Furthermore, polycyclic aromatic hydrocarbons were detected in most leachates, with phenanthrene and naphthalene being most frequently detected in concentrations up to 4.5 μg/L for naphthalene. Further insights on organic pollutants’ leaching from the tested materials were obtained by a non-target GC-MS screening of the leachates. Several commonly used additives such as flame retardants and light stabilizers were detected. Although no information on long-term leaching and material behavior under outdoor conditions could be obtained by the developed methodology, the laboratory test results could be used to benchmark the materials for their potential impact on roof runoff quality by the calculation of material indexes (which summarize the material-pollutant relationships). EPDM and PU roofing materials were identified as the materials having the highest potential to affect roof runoff quality.

由于屋顶代表了城市不透水表面的主要部分，因此假设屋顶径流是城市雨水污染的重要来源。然而，不同屋顶材料对这种污染的贡献仅在有限的范围内进行了研究。在这项研究中，开发了一种资源和时间效率高的方法，该方法使用标准化浸出测试 (CEN/TS16637-2) 的一些原则，以确定 16 种常用屋顶材料（EPDM、PVC、TPO）的材料-污染物关系、EVA、PU 和沥青膜）。检测到的金属浓度范围从合成材料浸出液中的几微克/升到 EPDM 材料浸出液中锌的 2.5 毫克/升。在任何渗滤液中均未检测到 Cd 和 Cr。此外，在大多数浸出液中检测到多环芳烃，最常检测到的菲和萘浓度高达 4.5 μg/L 的萘。通过对渗滤液的非目标 GC-MS 筛选，获得了关于有机污染物从测试材料中浸出的进一步见解。检测到几种常用的添加剂，如阻燃剂和光稳定剂。尽管所开发的方法无法获得室外条件下长期浸出和材料行为的信息，但实验室测试结果可用于通过计算材料指数（总结物质-污染物关系）。