|LIU Yan, LIN Jian, LV Jun gang, LI Xiao-xiu，et al.Pollution Characteristics and Health Risks of Metal Elements in Magnetic Particles of Urban Road Dust in Beijing and Tokyo[J].Environmental Monitoring and Forewarning,2021,13(5):93-99
|关键词: 道路积尘 磁性颗粒物 金属元素 污染特征 健康风险
|Pollution Characteristics and Health Risks of Metal Elements in Magnetic Particles of Urban Road Dust in Beijing and Tokyo
LIU Yan, LIN Jian, LV Jun gang, LI Xiao-xiu，et al
1. State Environmental Protection Key Laboratory of Dioxin Pollution Control, National Research Center for Environmental Analysis and Measurement, Beijing 100029, China;2. College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China
|In August 2019, the road dust from Beijing and Tokyo was investigated. The concentrations of 28 metal elements in road dust and it’s magnetic particles from two cities were analyzed by magnetic separation and inductive coupled plasma mass spectrometry (ICP-MS). A comparison of pollution characteristics and health risks of metal elements were also investigated. The results showed that the concentration of Fe in road dust were 25.3 and 21.2 mg/g, with the magnetic particle ratio 22.4% and 13.0% for Tokyo and Beijing, respectively. The influence of human activities on the magnetic particles of road dust in Tokyo was more significant than that in Beijing, with Zn and Ag were 7.2 and 5.6 times higher. The enrichment rate of Cr, Ni, and other elements in the magnetic particles of road dust in Beijing is much higher than that in Tokyo. In Tokyo and Beijing, the non carcinogenic risk and carcinogenic risk of magnetic particles were lower than the threshold limit values in road dust, but the carcinogenic risk reached 6.9×10-7 and 6.3×10-7, respectively, which was very close to the acceptable level of 10-6, and should arouse the attention of relevant departments. Hand mouth ingestion was the main exposure pathway, but the skin contact has the highest non carcinogenic risk value. Results of health risk assessment showed that Cr was the major toxic element in magnetic particles.
|Key words: Road dust Magnetic particle Metal element Pollution characteristic Health risk