Abstract
Chengdu, a megacity in southwestern China, experiences severe air pollution; however, knowledge of the seasonal variation in mass concentration, extent of potentially harmful elements (PHEs) contamination, and sources caused by heavy metals remains lacking. This study adopted a weighting method to calculate the daily mass concentration of PM1 and used ICP-MS to determine PHE concentrations. Results indicated that PM1 mass concentration was in the range 5.44–105.91 μg/m3. Seasonal PM1 mass concentration could be arranged in the following order: winter > fall > spring > summer. The concentrations of PHEs in the PM1 sample mostly showed the same seasonal variation characteristics as mass concentration. The average concentration of each PHE decreased as follows: Cu (107.44) > Zn (81.52) > Pb (22.04) > As (8.17) > Sb (1.91) > Ni (1.87) > Cr(VI) (0.84) > Cd (0.40) > Tl (0.33) (ng/m3). Enrichment factor values varied markedly from mild to anomalous enrichment. Principal component analysis revealed mainly derived from the fossil fuel combustion (55.215%).
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Acknowledgements
This study was sponsored by the National Key Research and Development Project (2018YFC0214001, 2018YFC1508804), the National Natural Scientific Foundation of China (41977289) and the Beijing Environment Foundation for Young Talents (BEFYT).
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Wang, J., Huang, Y., Li, T. et al. Annual Characteristics, Source Analysis of PM1-Bound Potentially Harmful Elements in the Eastern District of Chengdu, China. Arch Environ Contam Toxicol 79, 177–183 (2020). https://doi.org/10.1007/s00244-020-00751-w
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DOI: https://doi.org/10.1007/s00244-020-00751-w