Particulate Matter and Gaseous Pollutions in Three Metropolises along the Chinese Yangtze River: Situation and Implications

International Journal of Environmental Research and Public Health
Mao MaoYan Yin

Abstract

The situation of criteria atmospheric pollutants, including particulate matter and trace gases (SO₂, NO₂, CO and O₃), over three metropolises (Chongqing, Wuhan, and Nanjing), representing the upstream, midstream and downstream portions of the Yangtze River Basin from September 2015 to August 2016 were analyzed. The maximum annual mean PM2.5 and PM10 concentrations were 61.3 and 102.7 μg/m³ in Wuhan, while highest annual average gaseous pollutions occurred in Nanjing, with 49.6 and 22.9 ppb for 8 h O₃ and NO₂, respectively. Compared to a few years ago, SO₂ and CO mass concentrations have dropped to well below the qualification standards, and the O₃ and NO₂ concentrations basically meet the requirements though occasionally is still high. In contrary, about 13%, 25%, 22% for PM2.5, and 4%, 17%, 15% for PM10 exceed the Chinese Ambient Air Quality Standard (CAAQS) Grade II. Particulate matter, especially PM2.5, is the most frequent major pollutant to poor air quality with 73%, 64% and 88% accounting for substandard days. Mean PM2.5 concentrations on PM2.5 episode days are 2⁻3 times greater than non-episode days. On the basis of calculation of PM2.5/PM10 and PM2.5/CO ratios, the enhanced particulate matter pollution on episode days i...Continue Reading

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Citations

May 5, 2020·Environmental Science and Pollution Research International·Alsaid Ahmed AlmetwallyAhmed A Allam
Jan 8, 2020·International Journal of Environmental Research and Public Health·Mao MaoYan Yin
Dec 12, 2020·International Journal of Environmental Research and Public Health·Mao MaoXiaolin Zhang
Jan 28, 2022·Environmental Science and Pollution Research International·Yaqi LiuXiaoqing Jin

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Methods Mentioned

BETA
light scattering

Software Mentioned

Hybrid Single - Particle Lagrangian Integrated Trajectory Mode...

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