Spatiotemporal variations and risk assessment of ambient air O 3 , PM 10 and PM 2.5 in a coastal city of China
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Spatiotemporal variations and risk assessment of ambient air O3, PM10 and PM2.5 in a coastal city of China Lichao Wang1,2 Liqun Xing ●
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Xiankun Wu4 Jie Sun5 Ming Kong1 ●
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Accepted: 17 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Rapid industrialization and urbanization has created significant air pollution problems that have recently begin to impact the lives and health of human beings in China. This study systematically investigated the spatiotemporal variations and the associated health risks of ambient O3, PM10 and PM2.5 between 2016 and 2019. The relationships between the target air pollutants and meteorological conditions were further analyzed using the Spearman rank correlation coefficient method. The results demonstrated that the annual mean concentrations of PM10 and PM2.5 experienced a decreasing trend overall, and PM2.5 significantly decreased from 1.54 μg/m3 in 2016 to 1.48 μg/m3 in 2019. In contrast, the annual mean concentrations of O3 were nearly constant during the study period with a slight increasing trend. The pollutants exhibited different seasonal variations and cyclical diurnal variations. The most highest O3 pollution was seen in spring and summer, while spring and winter were the seasons with the most PM10 and PM2.5 pollution. The highest concentrations of O3 appeared in periods of strong solar radiation intensity and photochemical reactions. The highest concentrations of PM10 and PM2.5 appeared at commuting time. The pollutant concentrations were significantly affected by meteorological conditions. Finally, the noncarcinogenic risks from exposure to O3, PM10 and PM2.5 were at an acceptable level (HI < 0.96) and O3 accounted for ~50% of the total non-carcinogenic risks. However, PM2.5 posed highly carcinogenic risks (2.5 × 10−4 < CR < 1.6 × 10−1) and O3 exposure showed high potential ecological impacts on vegetation (AOT40: 23.3 ppm-h; W126: 29.0 ppm-h). Keywords Atmospheric air pollution Particulate matter Ozone Health risk Yancheng city Variations characterization ●
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Introduction Supplementary information The online version of this article (https:// doi.org/10.1007/s10646-020-02295-0) contains supplementary material, which is available to authorized users. * Liqun Xing [email protected] * Ming Kong [email protected] 1
Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, No.8 Jiangwangmiao Street, Nanjing 210042, China
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Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering, Yancheng 224000, China
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State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
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School of Chemical and Environmental Engineering, Yancheng Teachers University, Yancheng 224002, China
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Suzhou Capital Greinworth Environmental Protection Technology Co., Ltd, Suzhou 215216, China
With rapid economic development and the overuse of fossil fuels, China is facing increasin
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