POLLUTION CHARACTERISTICS AND SOURCE APPORTIONMENT OF WATER-SOLUBLE IONS IN PM<sub>2.5</sub> IN XINXIANG

LI Hongliang; TAO Jie; LI Lanqing; ZHAO Wenpeng; XU Mengyuan; JIA Mengke; YANG Ying; LIU Huanjia

doi:10.13205/j.hjgc.202308015

Volume 41 Issue 8

Aug. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(8): 117-126

LI Hongliang, TAO Jie, LI Lanqing, ZHAO Wenpeng, XU Mengyuan, JIA Mengke, YANG Ying, LIU Huanjia. POLLUTION CHARACTERISTICS AND SOURCE APPORTIONMENT OF WATER-SOLUBLE IONS IN PM2.5 IN XINXIANG[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 117-126. doi: 10.13205/j.hjgc.202308015

Citation:

LI Hongliang, TAO Jie, LI Lanqing, ZHAO Wenpeng, XU Mengyuan, JIA Mengke, YANG Ying, LIU Huanjia. POLLUTION CHARACTERISTICS AND SOURCE APPORTIONMENT OF WATER-SOLUBLE IONS IN PM_2.5 IN XINXIANG[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 117-126. doi: 10.13205/j.hjgc.202308015

Citation:

LI Hongliang, TAO Jie, LI Lanqing, ZHAO Wenpeng, XU Mengyuan, JIA Mengke, YANG Ying, LIU Huanjia. POLLUTION CHARACTERISTICS AND SOURCE APPORTIONMENT OF WATER-SOLUBLE IONS IN PM_2.5 IN XINXIANG[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 117-126. doi: 10.13205/j.hjgc.202308015

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POLLUTION CHARACTERISTICS AND SOURCE APPORTIONMENT OF WATER-SOLUBLE IONS IN PM_2.5 IN XINXIANG

doi: 10.13205/j.hjgc.202308015

1. Xinxiang Ecology and Environmental Monitoring Center of Henan Province, Xinxiang 453007, China;
2. Zhengzhou Ecology and Environmental Monitoring Center of Henan Province, Zhengzhou 450052, China;
3. 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: 2023-03-13
Available Online: 2023-11-15

Abstract

Abstract

Water soluble inorganic ions (WSIIs) are the main chemical components of fine particle matter (PM_2.5), which can degrade atmospheric visibility and induce rapid formation of extreme haze episodes. In order to explore pollution characteristics and sources of WSIIs in PM_2.5 in Xinxiang, PM_2.5 samples were collected by seasons during 2019—2020. In total, 8 ions (K⁺, Ca²⁺, Na⁺, Mg²⁺, NH₄⁺, Cl^-, NO₃^- and SO₄^2-) were analyzed using ion chromatography. The annual mean concentrations of PM_2.5 and WSIIs were (66.25±35.73) μg/m³ and (33.66±24.15) μg/m³, respectively. The concentrations of PM_2.5 and WSIIs exhibited obvious seasonal variation characteristics, with maximum concentration in winter and minimum in summer. SNA (NO₃^-, SO₄^2- and NH₄⁺) accounted for 89.7% of the average mass concentrations of total WSIIs. Furthermore, the concentration of SNA and the ratio of SNA to WSIIs increased significantly with the aggravation of pollution levels in winter. The PMF source analysis results indicated that secondary sulfate, secondary nitrate, combustion source and dust were the main sources of WSIIs in PM_2.5 in Xinxiang. Finally, the results from backward trajectories associated with PMF-resolved sources showed that the low altitude and low-speed air masses from Beijing-Tianjin-Hebei and the southwest of Henan province had a great influence on PM_2.5 concentration in Xinjiang. Secondary sulfate and secondary nitrate contributed more to WSIIs under the influence of those air masses. However, the dust source in study areas was mainly influenced by the masses from the northwest regions, higher proportions of Ca²⁺ and Mg²⁺ in WSIIs were also found. The findings could contribute to understand the characteristics and sources of WSIIs, and enlighten beneficial suggestions for particle pollution prevention and control in the study area.
- PM_2.5,
- water soluble ions,
- seasonal variation,
- source apportionment,
- Xinxiang

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References(37)

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