Persistent pollution episodes, transport pathways, and potential sources of air pollution during the heating season of 2016–2017 in Lanzhou, China

Guo, Yongqiang; Lin, Chunying; Li, Jianping; Wei, Lingbo; Ma, Yanhui; Yang, Qidong; Li, Dandan; Wang, Hang; Shen, Jian

doi:10.1007/s10661-021-09597-8

Cited by 7 publications

(1 citation statement)

References 74 publications

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“…However, there is still a significant gap between the PM 2.5 concentration in northern China and its latest recommendations on air quality guidelines (5 µg m −3 ) by the World Health Organization (https://apps.who.int/iris/bitstream/handle/10665/ 345329/9789240034228-eng.pdf, last access: 26 November 2018; p. 78). In addition, severe PM 2.5 pollution still frequently occurred in northern China during wintertime (Guo et al, 2021;. To figure out the causes behind the pollution and further improve air quality in northern China, it is essential to use online hightime-resolution source apportionment technology to understand the chemical composition and source contribution of PM 2.5 in those pollution events.…”

Section: Introductionmentioning

confidence: 99%

High-time-resolution chemical composition and source apportionment of PM_2.5 in northern Chinese cities: implications for policy

Zhang,

Tian,

Wang

et al. 2023

Atmos. Chem. Phys.

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Abstract. Fine particulate matter (PM2.5) pollution is still one of China's most important environmental issues, especially in northern cities during wintertime. In this study, intensive real-time measurement campaigns were conducted in Xi'an, Shijiazhuang, and Beijing to investigate the chemical characteristics and source contributions of PM2.5 and explore the formation of heavy pollution for policy implications. The chemical compositions of PM2.5 in the three cities were all dominated by organic aerosol (OA) and nitrate (NO3-). Results of source apportionment analyzed by a hybrid environmental receptor model (HERM) showed that the secondary formation source contributed more to PM2.5 compared to other primary sources. Biomass burning was the dominant primary source in the three pilot cities. The contribution of coal combustion to PM2.5 is non-negligible in Xi'an and Shijiazhuang but is no longer an important contributor in the capital city of Beijing due to the execution of a strict coal-banning policy. The potential formation mechanisms of secondary aerosol in the three cities were further explored by establishing the correlations between the secondary formation sources and aerosol liquid water content (ALWC) and Ox (O3+NO2), respectively. The results showed that photochemical oxidation and aqueous-phase reaction were two important pathways of secondary aerosol formation. According to source variations, air pollution events that occurred in campaigns were classified into three types: biomass-combustion-dominated, secondary-formation-source-dominated, and a combination of primary and secondary sources. Additionally, this study compares the changes in chemical composition and source contributions of PM2.5 in past decades. The results suggest that the clean-energy replacements for rural households should be urgently encouraged to reduce the primary source emissions in northern China, and collaborative control on ozone and particulate matter needs to be continuously promoted to weaken the atmosphere oxidation capacity for the sake of reducing secondary aerosol formation.

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Section: Introductionmentioning

confidence: 99%

High-time-resolution chemical composition and source apportionment of PM_2.5 in northern Chinese cities: implications for policy

Zhang,

Tian,

Wang

et al. 2023

Atmos. Chem. Phys.

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Pollution characteristics, potential source areas, and transport pathways of PM2.5 and O3 in an inland city of Shijiazhuang, China

Gao,

et al. 2024

Air Qual Atmos Health

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Long-term study of chemical characteristics of aerosol compositions in the rural environment of Rūgšteliškis (Lithuania)

Gill,

Pauraitė,

Kalinauskaitė

et al. 2024

Atmospheric Pollution Research

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Persistent pollution episodes, transport pathways, and potential sources of air pollution during the heating season of 2016–2017 in Lanzhou, China

Cited by 7 publications

References 74 publications

High-time-resolution chemical composition and source apportionment of PM_2.5 in northern Chinese cities: implications for policy

High-time-resolution chemical composition and source apportionment of PM_2.5 in northern Chinese cities: implications for policy

Pollution characteristics, potential source areas, and transport pathways of PM2.5 and O3 in an inland city of Shijiazhuang, China

Long-term study of chemical characteristics of aerosol compositions in the rural environment of Rūgšteliškis (Lithuania)

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Persistent pollution episodes, transport pathways, and potential sources of air pollution during the heating season of 2016–2017 in Lanzhou, China

Cited by 7 publications

References 74 publications

High-time-resolution chemical composition and source apportionment of PM2.5 in northern Chinese cities: implications for policy

High-time-resolution chemical composition and source apportionment of PM2.5 in northern Chinese cities: implications for policy

Pollution characteristics, potential source areas, and transport pathways of PM2.5 and O3 in an inland city of Shijiazhuang, China

Long-term study of chemical characteristics of aerosol compositions in the rural environment of Rūgšteliškis (Lithuania)

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High-time-resolution chemical composition and source apportionment of PM_2.5 in northern Chinese cities: implications for policy

High-time-resolution chemical composition and source apportionment of PM_2.5 in northern Chinese cities: implications for policy