Pollution characteristics and risk assessment of atmospheric heavy metal deposition in Beijing
YIN Yu-zhu1,2, FAN Yan-guo1, PAN Yu-chun2, SUN Zai-jin3, MA Hao-sen4, GAO Yun-bing2
1. College of Ocean Space and Information, China University of Petroleum(East China), Qingdao 266000, China; 2. Research Center of Information Technology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; 3. Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing 100012, China; 4. College of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China
Abstract：In order to understand the spatial characteristics and the health risk level of heavy metal deposition flux in Beijing during the epidemic, 52 sets of atmospheric dust samples were collected in Beijing from 2020 to 2021. Laboratory instrument was used to measure the content of six heavy metals (Cr, Ni, Cu, Zn, As, Cd) in the samples, then we calculated the precipitation flux. The results showed that the average content of Cd was less than 10mg/kg, the average content of Cr, Ni, Cu, As was 10~100mg /kg, and the average content of Zn was more than 100mg/kg. The contents of Cr, Ni, Cu, Zn, As and Cd exceeded the Beijing soil background value, and the excess rates were 93.9%, 51.0%, 98.0%, 100.0%, 89.8% and 100.0%, respectively. The precipitation flux of heavy metals in Beijing were similar to the weighted average of agriculture and rural areas in China, and significantly higher than foreign areas. The precipitation flux of heavy metals in Beijing urban area were generally lower than suburban areas. The results of ground accumulation index showed that the pollution levels of each element were in the order of Cd > Zn > Cu>Cr>As>Ni, among which Cd and Zn were moderately and moderately polluted, and the other elements were mildly polluted. In 13monitoring sites, the moderate potential ecological hazards ranged from 23.1% to 76.9% in four quarters, among which Cd had moderate hazard and strong ecological hazard. The results of health risk assessment showed that there were non-carcinogenic risks of Cr and As in adult and children.
殷雨竹, 樊彦国, 潘瑜春, 孙在金, 马浩森, 郜允兵. 北京地区大气重金属沉降污染特征与风险评价[J]. 中国环境科学, 2023, 43(6): 2763-2776.
YIN Yu-zhu, FAN Yan-guo, PAN Yu-chun, SUN Zai-jin, MA Hao-sen, GAO Yun-bing. Pollution characteristics and risk assessment of atmospheric heavy metal deposition in Beijing. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(6): 2763-2776.
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