Levels, influencing factors, and chemical constituents of atmospheric particulates in 10 cities with poor air quality in China in 2005-2017
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Abstract
This paper briefly overviewed the research advances on pollution levels, influencing factors, and chemical constituents of atmospheric particulates in 10 cities with poor air quality in China from 2005 to 2017, including Shijiazhuang, Handan, Xingtai, Baoding, Tangshan, Taiyuan, Xi'an, Hengshui, Zhengzhou, and Jinan. Although atmospheric particulates pollution levels in the 10 cities have been reduced in recent years, the problem is still grave. The influencing factors of atmospheric particulates include resident population, source of particulates, city geographical location, meteorology, and climate. Emissions from anthropogenic activities such as coal burning, diesel vehicles, secondary pollution, and dust are the main sources of atmospheric particulates in the selected cities, and the contribution rate of coal burning source is expected to increase in heating season. Most of the 10 cities are in semi-arid and semi-humid zones, with temperate monsoon climate. The atmospheric particulates are composed of watersoluble ions, organic carbon and element carbon, heavy metals, and organic constituents. In general, although a lot of work has been done in the study of atmospheric particulates in China, there is still space for improvement. For example, the studies of atmospheric particulates are fragmented, discontinuous, and unsystematic, making it difficult to conduct indepth comparison and analysis. In the future, therefore, more systematic and comprehensive monitoring, component analyses, toxicity tests, and source analyses should be carried out in the study of atmospheric particulates.
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