Regional Air Pollutant Characteristics and Health Risk Assessment of Large Cities in Northeast China
This study systematically investigated the pollution characteristics of atmospheric O<sub>3</sub> and PM<sub>2.5</sub>, regional transport, and their health risks in three provincial capitals in northeast China during 2016–2020. The results show that O<sub>3</sub>...
Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/71ee691a17a04a539a2e43d3e30a6352 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | This study systematically investigated the pollution characteristics of atmospheric O<sub>3</sub> and PM<sub>2.5</sub>, regional transport, and their health risks in three provincial capitals in northeast China during 2016–2020. The results show that O<sub>3</sub> concentrations showed a trend of high summer and low winter, while PM<sub>2.5</sub> concentrations showed a trend of high winter and low summer during these five years. The results of the correlation analysis indicate that external sources contribute more O<sub>3</sub>, while PM<sub>2.5</sub> is more from local sources. The backward trajectory clustering analysis results showed that Changchun had the highest share of northwest trajectory with a five-year average value of 67.89%, and the city with the highest percentage of southwest trajectory was Shenyang with a five-year average value of 23.95%. The backward trajectory clustering analysis results showed that the share of the northwest trajectory decreased and the share of the southwest trajectory increased for all three cities in 2020 compared to 2016. The results of the potential source contribution function (PSCF) and concentration weighting trajectory (CWT) analysis showed that the main potential source areas and high concentration contribution areas for PM<sub>2.5</sub> in the northeast were concentrated in Mongolia, Inner Mongolia, Shandong Province, and the northeast, and for O<sub>3</sub> were mainly located in Shandong, Anhui, and Jiangsu Provinces, and the Yellow Sea and Bohai Sea. The non-carcinogenic risk of PM<sub>2.5</sub> in Harbin was high with a HQ of 2.04, while the other cities were at acceptable levels (HQ < 0.69) and the non-carcinogenic risk of O<sub>3</sub> was acceptable in all three cities (HQ < 0.22). However, PM<sub>2.5</sub> had a high carcinogenic risk (4 × 10<sup>−4</sup> < CR < 0.44) and further treatment is needed to reduce the risk. |
|---|