Environmental Engineering Research

  • 제20권3호
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  • Pages.260-267
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  • 2015
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  • 1226-1025(pISSN)
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  • 2005-968X(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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Temporal distribution, influencing factors and pollution sources of urban ambient air quality in Nanchong, China

  • Zhou, Hong (College of Environmental Science and Engineering, China West Normal University) ;
  • Li, Youping (College of Environmental Science and Engineering, China West Normal University) ;
  • Liu, Huifang (College of Environmental Science and Engineering, China West Normal University) ;
  • Fan, Zhongyu (College of Environmental Science and Engineering, China West Normal University) ;
  • Xia, Jie (Nanchong Environmental Monitoring Center) ;
  • Chen, Shanli (Nanchong Environmental Monitoring Center) ;
  • Zheng, Yuxiang (Guangzhou Research Institute of Environmental Protection) ;
  • Chen, Xiaocui (The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong)
  • 투고 : 2015.04.18
  • 심사 : 2015.08.05
  • 발행 : 2015.09.30
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초록

The $PM_{10}$, $SO_2$ and $NO_2$ mass concentrations were obtained over five years from monitoring stations across Nanchong, a southwest city in China. Changes in urban air quality over time, as well as the factors influencing that change, were evaluated based on air pollutant concentrations, the Air Pollution Index (API), and the Comprehensive Pollution Index (P). The results showed that the total annual mean $PM_{10}$, $SO_2$ and $NO_2$ concentrations over the five years studied were $61.1{\pm}1.1$, $45.0{\pm}3.9$ and $34.9{\pm}4.9{\mu}g{\cdot}m^{-3}$, respectively. The annual mean concentrations displayed a generally decreasing trend; lower than the annual mean second-level air quality limit. Meanwhile, the annual mean API values were in a small range of 52-53, the air quality levels were grade II, and P values were 1.06-1.21 less than the slight level ($P{\leq}1.31$). Total monthly mean $PM_{10}$, $SO_2$, $NO_2$ concentrations, and API and P values were consistently higher in winter and spring than during autumn and summer. The results of a correlation analysis showed that temperature and pressure were the major meteorological factors influencing pollution levels. Pollution sources included industrial coal and straw burning, automobiles exhaust and road dust, fireworks, and dust storms.

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