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High Contributions of Secondary Inorganic Aerosols to PM2.5 under Polluted Levels at a Regional Station in Northern China.
Int J Environ Res Public Health. 2016 12 15; 13(12)IJ

Abstract

Daily PM2.5 samples were collected at Shangdianzi (SDZ) regional site in Beijing-Tianjin-Hebei (BTH) region in 2015. Samples were subject to chemical analysis for organic carbon (OC), elemental carbon (EC), and major water-soluble inorganic ions. The annual average PM2.5 mass concentration was 53 ± 36 μg·m-3 with the highest seasonal average concentration in spring and the lowest in summer. Water-soluble inorganic ions and carbonaceous aerosols accounted for 34% ± 15% and 33% ± 9%, respectively, of PM2.5 mass on annual average. The excellent, good, lightly polluted, moderately polluted, and heavily polluted days based on the Air Quality Index (AQI) of PM2.5 accounted for 40%, 42%, 11%, 4%, and 3%, respectively, of the year. The sum of the average concentration of sulfate, nitrate, and ammonium (SNA) increased from 4.2 ± 2.9 μg·m-3 during excellent days to 85.9 ± 22.4 μg·m-3 during heavily polluted days, and their contributions to PM2.5 increased from 15% ± 8% to 49% ± 10% accordingly. In contrast, the average concentration of carbonaceous aerosols increased from 9.2 ± 2.8 μg·m-3 to 51.2 ± 14.1 μg·m-3, and their contributions to PM2.5 decreased from 34% ± 6% to 29% ± 7%. Potential source contribution function (PSCF) analysis revealed that the major sources for high PM2.5 and its dominant chemical components were within the area mainly covering Shandong, Henan, and Hebei provinces. Regional pollutant transport from Shanxi province and Inner Mongolia autonomous region located in the west direction of SDZ was also important during the heating season.

Authors+Show Affiliations

Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China. liyang@cma.gov.cn.South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China. taojun@scies.org.Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, ON M3H 5T4, Canada. leiming.zhang@canada.ca.Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China. jiaxiaofangstar@126.com.Key Laboratory of Regional Climate-Environment for Temperate East Asia (RCE-TEA), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China. wuyf@mail.iap.ac.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27983711

Citation

Li, Yang, et al. "High Contributions of Secondary Inorganic Aerosols to PM2.5 Under Polluted Levels at a Regional Station in Northern China." International Journal of Environmental Research and Public Health, vol. 13, no. 12, 2016.
Li Y, Tao J, Zhang L, et al. High Contributions of Secondary Inorganic Aerosols to PM2.5 under Polluted Levels at a Regional Station in Northern China. Int J Environ Res Public Health. 2016;13(12).
Li, Y., Tao, J., Zhang, L., Jia, X., & Wu, Y. (2016). High Contributions of Secondary Inorganic Aerosols to PM2.5 under Polluted Levels at a Regional Station in Northern China. International Journal of Environmental Research and Public Health, 13(12).
Li Y, et al. High Contributions of Secondary Inorganic Aerosols to PM2.5 Under Polluted Levels at a Regional Station in Northern China. Int J Environ Res Public Health. 2016 12 15;13(12) PubMed PMID: 27983711.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - High Contributions of Secondary Inorganic Aerosols to PM2.5 under Polluted Levels at a Regional Station in Northern China. AU - Li,Yang, AU - Tao,Jun, AU - Zhang,Leiming, AU - Jia,Xiaofang, AU - Wu,Yunfei, Y1 - 2016/12/15/ PY - 2016/10/26/received PY - 2016/11/28/revised PY - 2016/11/30/accepted PY - 2016/12/17/entrez PY - 2016/12/17/pubmed PY - 2017/8/2/medline KW - backward trajectory analysis KW - chemical composition KW - potential source contribution function KW - regional transport JF - International journal of environmental research and public health JO - Int J Environ Res Public Health VL - 13 IS - 12 N2 - Daily PM2.5 samples were collected at Shangdianzi (SDZ) regional site in Beijing-Tianjin-Hebei (BTH) region in 2015. Samples were subject to chemical analysis for organic carbon (OC), elemental carbon (EC), and major water-soluble inorganic ions. The annual average PM2.5 mass concentration was 53 ± 36 μg·m-3 with the highest seasonal average concentration in spring and the lowest in summer. Water-soluble inorganic ions and carbonaceous aerosols accounted for 34% ± 15% and 33% ± 9%, respectively, of PM2.5 mass on annual average. The excellent, good, lightly polluted, moderately polluted, and heavily polluted days based on the Air Quality Index (AQI) of PM2.5 accounted for 40%, 42%, 11%, 4%, and 3%, respectively, of the year. The sum of the average concentration of sulfate, nitrate, and ammonium (SNA) increased from 4.2 ± 2.9 μg·m-3 during excellent days to 85.9 ± 22.4 μg·m-3 during heavily polluted days, and their contributions to PM2.5 increased from 15% ± 8% to 49% ± 10% accordingly. In contrast, the average concentration of carbonaceous aerosols increased from 9.2 ± 2.8 μg·m-3 to 51.2 ± 14.1 μg·m-3, and their contributions to PM2.5 decreased from 34% ± 6% to 29% ± 7%. Potential source contribution function (PSCF) analysis revealed that the major sources for high PM2.5 and its dominant chemical components were within the area mainly covering Shandong, Henan, and Hebei provinces. Regional pollutant transport from Shanxi province and Inner Mongolia autonomous region located in the west direction of SDZ was also important during the heating season. SN - 1660-4601 UR - https://www.unboundmedicine.com/medline/citation/27983711/High_Contributions_of_Secondary_Inorganic_Aerosols_to_PM2_5_under_Polluted_Levels_at_a_Regional_Station_in_Northern_China_ L2 - http://www.mdpi.com/resolver?pii=ijerph13121202 DB - PRIME DP - Unbound Medicine ER -