State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China; Science and Engineering Faculty, Queensland University of Technology (QUT), GPO Box 2434, Brisbane, 4001 Queensland, Australia.
Science and Engineering Faculty, Queensland University of Technology (QUT), GPO Box 2434, Brisbane, 4001 Queensland, Australia.
Ecotoxicol Environ Saf. 2017 Oct;144:593-600. doi: 10.1016/j.ecoenv.2017.06.073. Epub 2017 Jul 6.
Heavy metals (HMs) and polycyclic aromatic hydrocarbons (PAHs) are among the most toxic chemical pollutants present in urban stormwater. Consequently, urban stormwater reuse is constrained due to the human health risk posed by these pollutants. This study developed a scientifically robust approach to assess the risk to human health posed by HMs and PAHs in urban stormwater in order to enhance its reuse. Accordingly, an innovative methodology was created consisting of four stages: quantification of traffic and land use parameters; estimation of pollutant concentrations for model development; risk assessment, and risk map presentation. This methodology will contribute to catchment scale assessment of the risk associated with urban stormwater and for risk mitigation. The risk map developed provides a simple and efficient approach to identify the critical areas within a large catchment. The study also found that heavy molecular weight PAHs (PAHs with 5-6 benzene rings) in urban stormwater pose higher risk to human health compared to light molecular PAHs (PAHs with 2-4 benzene rings). These outcomes will facilitate the development of practical approaches for applying appropriate mitigation measures for the safe management of urban stormwater pollution and for the identification of enhanced reuse opportunities.
重金属（HMs）和多环芳烃（PAHs）是城市雨水径流中存在的最具毒性的化学污染物之一。因此，由于这些污染物对人类健康构成的风险，城市雨水的再利用受到限制。本研究开发了一种科学稳健的方法来评估城市雨水径流中重金属和多环芳烃对人类健康的风险，以提高其再利用性。因此，创建了一种创新的方法，包括四个阶段：交通和土地利用参数的量化；用于模型开发的污染物浓度估计；风险评估和风险图呈现。该方法将有助于评估与城市雨水相关的集水区风险，并进行风险缓解。开发的风险图提供了一种简单有效的方法来识别大集水区内的关键区域。该研究还发现，城市雨水径流中的高分子量多环芳烃（具有 5-6 个苯环的多环芳烃）对人类健康的风险高于低分子量多环芳烃（具有 2-4 个苯环的多环芳烃）。这些结果将有助于开发实用方法，以采取适当的缓解措施，安全管理城市雨水污染，并确定增强的再利用机会。
