Seasonal variation and secondary formation of size-segregated aerosol water-soluble inorganic ions in a coast megacity of North China Plain

Yao, Qing; Liu, Zirui; Si, Han; Cai, Zhiqiang; Liu, Jingle; Hao, Tianyi; Liu, Jinyun; Huang, Xiaojuan; Wang, Yuesi

doi:10.1007/s11356-020-09052-0

Cited by 11 publications

(11 citation statements)

References 69 publications

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“…Therefore, the calculated sea salt proportion above was overestimated. However, it can be confirmed that the sea-sourced aerosols made up only a small fraction of the total aerosol particles in autumn, which is consistent with the results of previous studies conducted in the coastal city of Tianjin and Qingdao (Dong et al, 2023;Yao et al, 2020;Zhang, Yang, et al, 2021). In addition, the relative proportion of non-sea-sourced Cl À in this study was lower than that of non-sea-sourced SO 4 2À , suggesting that there might be some ageing process of sea salt, leading to the deficit of Cl À in sea spray aerosols.…”

Section: Contribution Of Marine Aerosols To Particlessupporting

confidence: 91%

“…SOR and NOR can be used to indicate the secondary transformation process (Ma et al, 2017). Higher values are always accompanied by a higher degree of SIA formation in the atmosphere (Yao et al, 2020). The details of the calculation are as follows: 3 | RESULTS It should be mentioned that there was a light snow on 6 November 2021.…”

Section: Calculationsmentioning

confidence: 99%

“…In recent years, China has been suffering from severe air pollution with the rapid development of urbanization and industrialization (Huang et al, 2014; Wang et al, 2021). Persistently high levels of air pollution in China are a serious problem and have been a concern for decades (Wang et al, 2017; Yao et al, 2020). The North China Plain (NCP) including Beijing–Tianjin–Hebei region has a large area of around 3,000,000 km 2 and is one of the most polluted areas in China (Du et al, 2020; Song et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Chemical compositions and possible transportation of PM₂_.5 during two haze periods in a coastal city of the North China Plain

et al. 2023

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Although numerous studies have been carried out to study haze formation in the North China Plain (NCP) and Northeastern Plain (NP), little is known about the chemical compositions and haze formations in Qinhuangdao city, which is located in the northeast edge of the NCP and adjacent to the NP. In this study, water‐soluble inorganic ions, organic carbon and elemental carbon (EC) were analysed offline during two haze periods from October 29 to November 7, 2021. The results showed that NO3− and organic matter (OM) accounted for 34.81% and 21.15% of total PM2.5 mass concentration, respectively, followed by NH4+ (14.06%) and SO42− (12.33%). The sulphur oxidation ratio and nitrogen oxidation ratio as well as OM/EC ratio on haze days were higher than those on non‐haze days, suggesting both high secondary inorganic and organic aerosol formation on haze days under high relative humidity. Source apportionment results showed that marine aerosols contributed small of total aerosol particle loads, while the combustion‐related sources were the most, possibly coal combustion, biomass burning and vehicle emissions. Air masses during haze periods mainly came from southwest and west directions in this case. Further calculated meteorological data of 2018–2021 showed high PM2.5 mass in Qinhuangdao were mainly affected by low‐speed southwest wind in autumn. The results highlighted the important role of long‐range transport of air pollutants from the NCP instead of the NP on haze formation in autumn in Qinhuangdao.

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Section: Contribution Of Marine Aerosols To Particlessupporting

confidence: 91%

Section: Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemical compositions and possible transportation of PM₂_.5 during two haze periods in a coastal city of the North China Plain

et al. 2023

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“…By contrast, nitrate and chloride may predominantly exist in the fine mode in winter and the coarse mode (>2 μm) in fall in coastal areas (Zhou et al., 2020). During the severe winter‐haze episodes, enhanced coarse‐mode mass concentration of sulfate was observed (Li et al., 2013) and the mode size of mass distributions of secondary inorganic aerosol (SIA, including sulfate, nitrate, and ammonium) could shift from 0.4 μm to >1 μm in northern China (Yao et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

Secondary Formation of Submicron and Supermicron Organic and Inorganic Aerosols in a Highly Polluted Urban Area

et al. 2023

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Atmospheric particles affect the radiative balance by absorbing and scattering radiation or participating in cloud-forming processes (Zhang et al., 2015). These particles also affect visibility and human health (An et al., 2019;Lelieveld et al., 2015). Particles of different sizes may have different physical and chemical characteristics and deposit differently in the human respiratory system (Kelly & Fussell, 2012). Submicron (PM 1 ) and fine particles (PM 2.5 ) have shown different adverse health effects that are likely attributed to their composition

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“…Primary particulate matter is usually produced by direct emissions of pollutant sources, such as soil dust from the ground, roads, and construction sites, biomass burning, and sea salt particles transported from the ocean. The secondary particulate matter is generally formed by the oxidation reaction of SO 2 (sulfur dioxide), NO X (nitrogen dioxide), NH 3 (ammonia) , and other gases (Yao et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Size Distributions of Water-Soluble Inorganic Ions in Atmospheric Aerosols During the Meiyu Period in the Yangtze River Delta, China

Liu

Zhao

et al. 2021

Front. Environ. Sci.

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In order to investigate the chemical composition distributions and pollution characteristics of Total water-soluble inorganic ions (TWSII) in the rain period (Meiyu) in the East Asian summer monsoon season, including the impact of Meiyu on air pollution in the Yangtze River Delta, East China, the gaseous pollutant concentrations, the 9 sizes segregated particles, and water-soluble inorganic ions of aerosols were measured on the north shore of Taihu Lake from June 4 to July 5, 2016. Results show that the mass concentrations of atmospheric particulate matters (PM2.5 and PM10) and main gaseous pollutants (SO2, NO2, CO, and O3) decrease during the Meiyu period, with the largest decline in PM10 and the smallest in CO. TWSII in atmospheric particles are mainly concentrated in fine particles during the Meiyu period. The values of ρ (TWSII) for PM1.1, PM1.1–2.1, and PM2.1–10 before the Meiyu onset are generally greater than those during the Meiyu period. During the first pollution process, the ρ(TWSII) for PM1.1 and PM1.1–2.1 first increase to the peak values, and then decrease during the moderate rainfall period, when the ρ(TWSII) in PM2.1–10 increase to its maximum before the Meiyu onset. The mass concentrations for anions, cations, and total ions at different particle-size sections all exhibit bimodal distributions before and after the Meiyu onset. The mass concentration peaks at a particle size of 1.1–2.1 μm for fine particles, while at 5.8–9.0 μm (before the Meiyu onset) and 9.0–10.0 μm (during the Meiyu period) for coarse particles, respectively. The peak particle size for mass concentration of coarse particles moves toward larger sizes during the Meiyu period. The mass concentrations of SO42− at different particle-size sections show a bimodal distribution before the Meiyu onset and a multi-modal distribution during the Meiyu period. The mass concentrations of NO3− at different particle-size sections show a bimodal distribution before the Meiyu onset and a unimodal distribution during the Meiyu period. The mass concentrations of NH4+ at different particle-size sections present a bimodal distribution before and after the Meiyu onset, with the particle-size for peak concentrations distributing in 1.1–2.1 and 5.8–9.0 μm before the Meiyu onset, and 9.0–10.0 μm during the Meiyu period. The mean value of nitrogen oxidation ratio (NOR) is higher before the Meiyu onset than after, indicating that the secondary conversion of NO2 before the Meiyu onset is enhanced. The sulfur oxidation ratio (SOR) values are greater than NOR values, but the concentrations of NO2 in the same period during the Meiyu period are higher than those of SO2, which indicates that the secondary conversion of SO2 during the Meiyu period on the north bank of Taihu Lake is stronger than that of NO2. During the whole observation, the contribution of stationary sources mainly contributed to the atmospheric particulate matters during the Meiyu period. The contributions of vehicle exhaust and coal combustion to fine particles are more obviously affected by the changes in meteorological conditions during the Meiyu period, and the vehicle emissions contribute more to PM1.1–2.1 than to PM1.1.

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Seasonal variation and secondary formation of size-segregated aerosol water-soluble inorganic ions in a coast megacity of North China Plain

Abstract: The aerosol samples of water-soluble inorganic ions (WSIs), including SO 4

Cited by 11 publications

References 69 publications

Chemical compositions and possible transportation of PM₂_.5 during two haze periods in a coastal city of the North China Plain

Chemical compositions and possible transportation of PM₂_.5 during two haze periods in a coastal city of the North China Plain

Secondary Formation of Submicron and Supermicron Organic and Inorganic Aerosols in a Highly Polluted Urban Area

Size Distributions of Water-Soluble Inorganic Ions in Atmospheric Aerosols During the Meiyu Period in the Yangtze River Delta, China

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Seasonal variation and secondary formation of size-segregated aerosol water-soluble inorganic ions in a coast megacity of North China Plain

Abstract: The aerosol samples of water-soluble inorganic ions (WSIs), including SO 4

Cited by 11 publications

References 69 publications

Chemical compositions and possible transportation of PM2.5 during two haze periods in a coastal city of the North China Plain

Chemical compositions and possible transportation of PM2.5 during two haze periods in a coastal city of the North China Plain

Secondary Formation of Submicron and Supermicron Organic and Inorganic Aerosols in a Highly Polluted Urban Area

Size Distributions of Water-Soluble Inorganic Ions in Atmospheric Aerosols During the Meiyu Period in the Yangtze River Delta, China

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Product

Resources

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Chemical compositions and possible transportation of PM₂_.5 during two haze periods in a coastal city of the North China Plain

Chemical compositions and possible transportation of PM₂_.5 during two haze periods in a coastal city of the North China Plain