College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, People's Republic of China.
Department of Civil Engineering, Faculty of Engineering, University of Peradeniya, 20400 Sri Lanka.
J Hazard Mater. 2016 Jun 5;310:20-9. doi: 10.1016/j.jhazmat.2016.02.026. Epub 2016 Feb 11.
Heavy metals build-up on urban road surfaces is a complex process and influenced by a diverse range of factors. Although numerous research studies have been conducted in the area of heavy metals build-up, limited research has been undertaken to rank these factors in terms of their influence on the build-up process. This results in limitations in the identification of the most critical factor/s for accurately estimating heavy metal loads and for designing effective stormwater treatment measures. The research study undertook an in-depth analysis of the factors which influence heavy metals build-up based on data generated from a number of different geographical locations around the world. Traffic volume was found to be the highest ranked factor in terms of influencing heavy metals build-up while land use was ranked the second. Proximity to arterial roads, antecedent dry days and road surface roughness has a relatively lower ranking. Furthermore, the study outcomes advances the conceptual understanding of heavy metals build-up based on the finding that with increasing traffic volume, total heavy metal build-up load increases while the variability decreases. The outcomes from this research study are expected to contribute to more accurate estimation of heavy metals build-up loads leading to more effective stormwater treatment design.
城市道路表面重金属积累是一个复杂的过程，受到多种因素的影响。尽管已经有许多关于重金属积累的研究，但很少有研究对这些因素进行排名，以确定它们对积累过程的影响程度。这导致在确定最关键的因素/因素以准确估计重金属负荷和设计有效的雨水处理措施方面存在局限性。本研究基于来自世界各地多个不同地理位置的数据，对影响重金属积累的因素进行了深入分析。结果表明，交通量是影响重金属积累的最重要因素，而土地利用则排名第二。靠近主要道路、前干燥天数和道路粗糙度的因素排名相对较低。此外，研究结果还基于发现，随着交通量的增加，总重金属积累负荷增加，而变异性降低，从而提高了对重金属积累的概念理解。本研究的结果有望更准确地估计重金属积累负荷，从而更有效地设计雨水处理。
