Impact of traffic-related activities on heavy metal pollution, resuspension and associated health risks of urban dust
ZHU Xi1,2,3, SONG Si-yuan1,2, YU Wei-xian1,4, WANG Qian1,2, LIU Si-qi1,3
1. School of Information Engineering, Zhongnan University of Economics and Law, Wuhan 430073, China; 2. Research Center for Environment and Health, Zhongnan University of Economics and Law, Wuhan 430073, China; 3. Institute of Environmental Management and Policy, Zhongnan University of Economics and Law, Wuhan 430073, China; 4. Guangzhou Research Institute of Environment Protection Co., Ltd, Guangzhou 510620, China
Abstract：This study focuses on regions characterized by complex traffic environment area and its background environment, exploring the contamination profiles of six heavy metals (As, Hg, Cu, Ni, Pb, and Cd) at two spatial scales. Through modeling analysis, this study examined the patterns of dust resuspension and the associated health risks resulting from the movement of a single traffic source. The results indicate that the levels of Cd, Pb, and Cu contamination in traffic intensive area, as well as their ecological risks, exceed those found in background area, with Cd showing the highest contamination, 70% of which poses a high ecological risk. During the movement of a single traffic source, the severity of changes in dust concentration is positively correlated with velocity, with dust accumulation occurring at heights of 0.3m and 0.6m above ground level. The primary exposure pathway for key heavy metals is hand-to-mouth ingestion; although both non-carcinogenic risk and carcinogenic risks are generally low, at a vehicle speed of 60km/h and a height of 0.6m, the non-carcinogenic hazard quotient for inhalation (HQ-inh) is elevated. Therefore, protective measures are recommended for individuals active within this range.
朱熙, 宋思源, 余伟贤, 王倩, 刘思齐. 交通源活动对城市灰尘重金属污染、再悬浮及健康风险的影响[J]. 中国环境科学, 2025, 45(3): 1623-1635.
ZHU Xi, SONG Si-yuan, YU Wei-xian, WANG Qian, LIU Si-qi. Impact of traffic-related activities on heavy metal pollution, resuspension and associated health risks of urban dust. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(3): 1623-1635.
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