AI Article Synopsis
- Rapid industrialization and urbanization in China have led to significant air pollution issues, affecting public health and prompting a study on the variations and risks of air pollutants (O, PM) from 2016 to 2019.
- The study found a decrease in PM concentrations while O levels remained stable with a slight increase, showing different seasonal and daily patterns of pollution, peaking during specific times related to weather conditions.
- Despite the non-carcinogenic risks being at an acceptable level for O and PM exposure, PM presented higher carcinogenic risks, and O was noted to have considerable ecological impacts on vegetation.
Article 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 O, PM and PM 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 PM and PM experienced a decreasing trend overall, and PM significantly decreased from 1.54 μg/m in 2016 to 1.48 μg/m in 2019. In contrast, the annual mean concentrations of O 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 O pollution was seen in spring and summer, while spring and winter were the seasons with the most PM and PM pollution. The highest concentrations of O appeared in periods of strong solar radiation intensity and photochemical reactions. The highest concentrations of PM and PM appeared at commuting time. The pollutant concentrations were significantly affected by meteorological conditions. Finally, the non-carcinogenic risks from exposure to O, PM and PM were at an acceptable level (HI < 0.96) and O accounted for ~50% of the total non-carcinogenic risks. However, PM posed highly carcinogenic risks (2.5 × 10 < CR < 1.6 × 10) and O exposure showed high potential ecological impacts on vegetation (AOT40: 23.3 ppm-h; W126: 29.0 ppm-h).
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| http://dx.doi.org/10.1007/s10646-020-02295-0 | DOI Listing |
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