Laboratory for Industrial Water and Ecotechnology (LIWET), Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University Campus Kortrijk, Sint-Martens-Latemlaan 2B, B-8500, Kortrijk, Belgium.
Laboratory for Industrial Water and Ecotechnology (LIWET), Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University Campus Kortrijk, Sint-Martens-Latemlaan 2B, B-8500, Kortrijk, Belgium; Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), UMR 7285, University of Poitiers, 4 rue Michel Brunet, TSA 51106, 86073 Poitiers Cedex 9, France.
Chemosphere. 2021 Nov;283:131112. doi: 10.1016/j.chemosphere.2021.131112. Epub 2021 Jun 8.
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.
由于屋顶占城市不透水表面的很大一部分，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程度上进行了研究。在这项研究中，开发了一种资源和时间效率高的方法，该方法使用了标准化浸出测试（CEN/TS16637-2）的一些原则，以确定十六种常用屋顶材料（EPDM、PVC、TPO、EVA、PU 和沥青膜）的材料-污染物关系。金属的浓度范围从合成材料浸出液中的几μg/L 到 EPDM 材料浸出液中的 2.5mg/L 的 Zn。在任何浸出液中都未检测到 Cd 和 Cr。此外，大多数浸出液中都检测到多环芳烃，其中菲和萘最常以高达 4.5μg/L 的浓度检测到。通过对浸出液进行非靶向 GC-MS 筛选，进一步了解了测试材料中有机污染物的浸出情况。检测到几种常用的添加剂，如阻燃剂和光稳定剂。尽管通过开发的方法无法获得有关长期浸出和室外条件下材料行为的信息，但可以使用实验室测试结果通过计算材料指标（总结材料-污染物关系）来对材料进行基准测试，以评估其对屋顶径流质量的潜在影响。EPDM 和 PU 屋顶材料被确定为对屋顶径流质量有最大影响的材料。
