Occurrence, sources and health risks of toxic metal(loid)s in road dust from a mega city (Nanjing) in China
文献类型：期刊论文
| 作者 | Wang, Xiaoyu; Liu, Enfeng; Lin, Qi; Liu, Lin; Yuan, Hezhong; Li, Zijun |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2020 |
| 卷号 | 263 |
| 英文摘要 | YPotential toxic metal(loid)s (PTMs) in road dust are a major concern in relation to urban environmental quality. Identifying pollution hotspots and sources of PTMs is an essential prerequisite for pollution control and management. Herein, the concentrations, pollution and potential health risks of 8 PTMs (As, Cd, Co, Cu, Hg, Mo, Pb and Zn) in road dust from the highly urbanized areas of Nanjing were studied. Spatial occurrences and sources of PTMs were explored using geostatistics, principal component analysis (PCA) and local Moran's index. The contamination factor (CF) results showed that Co was mainly natural in origin, while the other PTMs were polluted, with average CFs ranging from 1.4 to 11.0 as follows: Hg > Mo > Cd > Cu > Pb > Zn > As, indicating moderate to very high contamination. Except for Co and Hg, the other PTMs were heavily loaded on PC1, which explained 44.72% of the total variance. Combining the statistical results and distributions of potential sources, we deduced that industrial emissions dominated the spatial patterns of all polluted PTMs in road dust, which showed high levels in the northern parts of the study region and generally decreasing levels southwards. Moreover, Pb and Zn in the south-central area and Cd in the north-central area displayed hotspots, with maximum CFs of 5.5 (Pb), 4.2 (Zn) and 16.2 (Cd), which were related to additional automotive and railway braking emissions, respectively. The resuspension of legacy pesticides in soil is likely responsible for the As pollution hotspot in the southwestern part. Despite the high anthropogenic contributions (27% for As and 68-88% for the other metals) to the PTMs in road dust, their noncarcinogenic and carcinogenic health risks were rarely found for children and adults based on the values of the hazard index and carcinogenic risk index. However, attention still should be paid to the pollution hotspots in the northern region. (C) 2020 Elsevier Ltd. All rights reserved. |
| 源URL | [http://159.226.73.51/handle/332005/20195]  |
| 专题 | 中国科学院南京地理与湖泊研究所 |
| 推荐引用方式 GB/T 7714 | Wang, Xiaoyu,Liu, Enfeng,Lin, Qi,et al. Occurrence, sources and health risks of toxic metal(loid)s in road dust from a mega city (Nanjing) in China[J]. ENVIRONMENTAL POLLUTION,2020,263. |
| APA | Wang, Xiaoyu,Liu, Enfeng,Lin, Qi,Liu, Lin,Yuan, Hezhong,&Li, Zijun.(2020).Occurrence, sources and health risks of toxic metal(loid)s in road dust from a mega city (Nanjing) in China.ENVIRONMENTAL POLLUTION,263. |
| MLA | Wang, Xiaoyu,et al."Occurrence, sources and health risks of toxic metal(loid)s in road dust from a mega city (Nanjing) in China".ENVIRONMENTAL POLLUTION 263(2020). |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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