College of Chemistry and Environmental Engineering, Shenzhen University, 518060 Shenzhen, 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; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, China.
Ecotoxicol Environ Saf. 2017 May;139:416-422. doi: 10.1016/j.ecoenv.2017.02.011. Epub 2017 Feb 23.
An in-depth understanding of polycyclic aromatic hydrocarbons (PAHs) build-up on urban roads is essential for effective stormwater treatment design. Past research studies have pointed out the relationship between influential factors and PAHs build-up individually. However, these studies do not provide a comprehensive analysis of the relationships and the hierarchy of factors in terms of their importance in influencing PAHs build-up. This paper presents the outcomes of an in-depth investigation into the range of influential factors, including traffic volume, land use, distance to highway and roughness of road surfaces by ranking them in terms of their influence on PAHs build-up. A number of data analysis techniques including forward stepwise linear regression (FSWLR), principal component analysis (PCA) and multiple linear regression (MLR) were employed for the analyses undertaken. The outcomes confirmed that traffic volume is ranked first while land use and roughness of road surfaces are second and the third, respectively. Distance to highway did not show a significant influence on PAHs build-up. Additionally, it was noted that a high traffic volume tended to produce high loads of PAHs with more than 4 rings and the spatial variability of PAHs build-up were relatively higher in high traffic volume areas. These outcomes contributed to the formulation of a robust stormwater treatment strategy and generation of priority area maps focusing on the removal of PAHs.
深入了解城市道路上多环芳烃（PAHs）的积聚对于有效的雨水处理设计至关重要。过去的研究指出了影响因素与 PAHs 积聚之间的关系。然而，这些研究并没有全面分析这些因素之间的关系以及它们在影响 PAHs 积聚方面的重要性层次。本文通过对交通量、土地利用、距高速公路的距离和道路表面粗糙度等一系列影响因素进行深入调查，根据其对 PAHs 积聚的影响对它们进行了排名，并展示了研究结果。采用了多种数据分析技术，包括逐步向前线性回归（FSWLR）、主成分分析（PCA）和多元线性回归（MLR）。结果证实，交通量排名第一，其次是土地利用和道路表面粗糙度。距高速公路的距离对 PAHs 积聚没有显著影响。此外，还注意到高交通量往往会产生具有 4 个以上环的高负荷 PAHs，并且在交通量较高的区域，PAHs 积聚的空间变异性相对较高。这些结果有助于制定强有力的雨水处理策略，并生成重点关注 PAHs 去除的优先区域地图。
