1. Annual Characteristics, Source Analysis of PM1-Bound Potentially Harmful Elements in the Eastern District of Chengdu, China.
- Author
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Wang, Jinjin, Huang, Yi, Li, Ting, Shi, Huibin, He, Min, Cheng, Xin, Ni, Shijun, and Zhang, Chengjiang
- Subjects
PRINCIPAL components analysis ,ATMOSPHERIC mercury ,NICKEL-chromium alloys ,HEAVY metals ,AIR pollution ,FOSSIL fuels ,MEGALOPOLIS ,SPRING - 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 PM
1 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%). [ABSTRACT FROM AUTHOR]- Published
- 2020
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