SEASONAL VARIATION, SOURCE AND LIGHT EXTINCTION CONTRIBUTION OF WATER-SOLUBLE INORGANIC IONS OF PM<sub>2.5</sub> IN THE NORTHERN SUBURB OF ANYANG, CHINA

YANG Zhixuan; LI Lanqing; LIU Huanjia; YANG Ying; XU Mengyuan; JIA Mengke; LIU Hengzhi

doi:10.13205/j.hjgc.202406009

Volume 42 Issue 6

Jun. 2024

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YANG Zhixuan, LI Lanqing, LIU Huanjia, YANG Ying, XU Mengyuan, JIA Mengke, LIU Hengzhi. SEASONAL VARIATION, SOURCE AND LIGHT EXTINCTION CONTRIBUTION OF WATER-SOLUBLE INORGANIC IONS OF PM2.5 IN THE NORTHERN SUBURB OF ANYANG, CHINA[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(6): 71-81. doi: 10.13205/j.hjgc.202406009

Citation:

YANG Zhixuan, LI Lanqing, LIU Huanjia, YANG Ying, XU Mengyuan, JIA Mengke, LIU Hengzhi. SEASONAL VARIATION, SOURCE AND LIGHT EXTINCTION CONTRIBUTION OF WATER-SOLUBLE INORGANIC IONS OF PM_2.5 IN THE NORTHERN SUBURB OF ANYANG, CHINA[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(6): 71-81. doi: 10.13205/j.hjgc.202406009

Citation:

YANG Zhixuan, LI Lanqing, LIU Huanjia, YANG Ying, XU Mengyuan, JIA Mengke, LIU Hengzhi. SEASONAL VARIATION, SOURCE AND LIGHT EXTINCTION CONTRIBUTION OF WATER-SOLUBLE INORGANIC IONS OF PM_2.5 IN THE NORTHERN SUBURB OF ANYANG, CHINA[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(6): 71-81. doi: 10.13205/j.hjgc.202406009

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SEASONAL VARIATION, SOURCE AND LIGHT EXTINCTION CONTRIBUTION OF WATER-SOLUBLE INORGANIC IONS OF PM_2.5 IN THE NORTHERN SUBURB OF ANYANG, CHINA

doi: 10.13205/j.hjgc.202406009

1. Anyang Ecology and Environmental Monitoring Center of Henan Province, Anyang 455000, China;
2. Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang 453007, China

Received Date: 2023-07-04
Available Online: 2024-07-11

Abstract

Abstract

Seasonal variation, source characteristics as well as light extinction contribution of water-soluble inorganic ions (WSIIs) in PM_2.5 were explored in the northern suburb of Anyang. Gaseous pollutants, PM_2.5 samples, and their chemical components were online monitored from March 2018 to February 2019. The results showed that the annual average concentrations of PM_2.5 and WSIIs were (76.68±73.00) μg/m³ and (45.60±34.17) μg/m³, respectively, which showed obvious seasonal variation with the maximum values in winter, and the minimum values in summer. NH⁺₄ most likely existed in the form of (NH₄)₂SO₄, NH₄NO₃, and NH₄Cl in four seasons at the observation sites. The main sources of WSIIs were secondary nitrate, secondary sulfate, dust, and combustion source by using positive matrix factorization (PMF). Furthermore, the revised IMPROVE algorithm was used to estimate the extinction coefficient (b_est). The results illustrated that the extinction contribution of SNA could reach 67%. Finally, typical pollution episodes were explored in winter in this study. Continuous emission and accumulation of pollutants under unfavorable metrological conditions was the major cause of the PM_2.5 pollution events at this site. Meanwhile, a rapid increase of SNA, especially SO^2-₄, can lead to higher PM_2.5 concentrations. Hence, the control of SNA is not only conducive to the reduction of regional PM_2.5 concentration, but also to improving atmospheric visibility.
- PM_2.5,
- water soluble inorganic ions,
- seasonal variation,
- source analysis,
- light extinction coefficient

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References(50)

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