Environmental Engineering Research

Korean Society of Environmental Engineers (대한환경공학회)
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Assessment and comparison of three different air quality indices in China

  • Li, Youping (College of Environmental Science and Engineering, China West Normal University) ;
  • Tang, Ya (College of Environmental Science and Engineering, China West Normal University) ;
  • Fan, Zhongyu (College of Environmental Science and Engineering, China West Normal University) ;
  • Zhou, Hong (College of Environmental Science and Engineering, China West Normal University) ;
  • Yang, Zhengzheng (College of Environmental Science and Engineering, China West Normal University)
  • Received : 2017.01.17
  • Accepted : 2017.07.03
  • Published : 2018.03.31
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Abstract

Air pollution index (API) is used in Mainland China and includes only $SO_2$, $NO_2$ and $PM_{10}$. In 2016, air quality index (AQI) replaced API. AQI contains three more air pollutants (CO, $O_3$ and $PM_{2.5}$). Both the indices emphasize on the effect of a single pollutant, whereas the contributions of all other pollutants are ignored. Therefore, in the present work, a novel air quality index (NAQI), which emphasizes on all air pollutants, has been introduced for the first time. The results showed that there were 19 d (5.2%) in API, 28 d (7.7%) in AQI and 183 d (50.1%) in NAQI when the indices were more than 100. In API, $PM_{10}$ and $SO_2$ were regarded as the primary pollutants, whereas all five air pollutants in AQI were regarded as primary. Furthermore, four air pollutants (other than the CO) in NAQI were regarded as primary pollutants. $PM_{10}$, as being the primary pollutant, contributed greatly in these air quality indices, and accounted for 51.2% (API), 37.0% (AQI) and 52.6% (NAQI). The results also showed that particulate matter pollution was significantly high in Luzhou, where stricter pollution control measures should be implemented.

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