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Analysis of the Characteristics and Sources of Carbonaceous Aerosols in PM2.5 in the Beijing, Tianjin, and Langfang Region, China.
Int J Environ Res Public Health. 2018 07 13; 15(7)IJ

Abstract

PM2.5 samples from Beijing, Tianjin, and Langfang were simultaneously collected from 20 November 2016 to 25 December 2016, and the organic carbon (OC) and elemental carbon (EC) content in the samples were measured and analyzed. The pollution characteristics and sources of OC and EC in atmospheric PM2.5 for three adjacent cities were discussed. The average mass concentrations of OC in PM2.5 in Beijing, Tianjin, and Langfang were 27.93 ± 23.35 μg/m³, 25.27 ± 12.43 μg/m³, and 52.75 ± 37.97 μg/m³, respectively, and the mean mass concentrations of EC were 6.61 ± 5.13 μg/m³, 6.14 ± 2.84 μg/m³, and 12.06 ± 6.81 μg/m³, respectively. The average mass concentration of total carbon (TC) accounted for 30.5%, 24.8%, and 49% of the average mass concentration of PM2.5 in the atmosphere. The total carbonaceous matter (TCA) in Beijing, Tianjin, and Langfang was 51.29, 46.57, and 96.45 μg/m³, respectively. The TCA was the main component of PM2.5 in the region. The correlation between OC and EC in the three cities showed R² values of 0.882, 0.633, and 0.784 for Beijing, Tianjin, and Langfang, respectively, indicating that the sources of urban carbonaceous aerosols had good consistency and stability. The OC/EC values of the three sampling points were 4.48 ± 1.45, 4.42 ± 1.77, and 4.22 ± 1.29, respectively, considerably greater than 2, indicating that the main sources of pollution were automobile exhaust, and the combustion of coal and biomass. The OC/EC minimum ratio method was used to estimate the secondary organic carbon (SOC) content in Beijing, Tianjin and Langfang. Their values were 10.73, 10.71, and 19.51, respectively, which accounted for 38%, 42%, and 37% of the average OC concentration in each city, respectively. The analysis of the eight carbon components showed that the main sources of pollutants in Beijing, Tianjin, and Langfang were exhaust emissions from gasoline vehicles, but the combustion of coal and biomass was relatively low. The pollution of road dust was more serious in Tianjin than in Beijing and Langfang. The contribution of biomass burning and coal-burning pollution sources to atmospheric carbon aerosols in Langfang was more prominent than that of Beijing and Tianjin.

Authors+Show Affiliations

Beijing Key Laboratory of Resources Environment and Geographic Information System, Capital Normal University, Beijing 100048, China. 2160902114@cnu.edu.cn. Base of the State Key Laboratory of Urban Environmental Process and Digital Modelling, Beijing 100048, China. 2160902114@cnu.edu.cn.Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China. jiangle3657@sina.com.Beijing Key Laboratory of Resources Environment and Geographic Information System, Capital Normal University, Beijing 100048, China. 2160902137@cnu.edu.cn. Base of the State Key Laboratory of Urban Environmental Process and Digital Modelling, Beijing 100048, China. 2160902137@cnu.edu.cn.Beijing Key Laboratory of Resources Environment and Geographic Information System, Capital Normal University, Beijing 100048, China. 2140901012@cnu.edu.cn. Base of the State Key Laboratory of Urban Environmental Process and Digital Modelling, Beijing 100048, China. 2140901012@cnu.edu.cn.Beijing Key Laboratory of Resources Environment and Geographic Information System, Capital Normal University, Beijing 100048, China. 2140902114@cnu.edu.cn. Base of the State Key Laboratory of Urban Environmental Process and Digital Modelling, Beijing 100048, China. 2140902114@cnu.edu.cn.Beijing Key Laboratory of Resources Environment and Geographic Information System, Capital Normal University, Beijing 100048, China. 2160902100@cnu.edu.cn. Base of the State Key Laboratory of Urban Environmental Process and Digital Modelling, Beijing 100048, China. 2160902100@cnu.edu.cn.Beijing Key Laboratory of Resources Environment and Geographic Information System, Capital Normal University, Beijing 100048, China. 4973@cnu.edu.cn. Base of the State Key Laboratory of Urban Environmental Process and Digital Modelling, Beijing 100048, China. 4973@cnu.edu.cn.Beijing Key Laboratory of Resources Environment and Geographic Information System, Capital Normal University, Beijing 100048, China. 2160902148@cnu.edu.cn. Base of the State Key Laboratory of Urban Environmental Process and Digital Modelling, Beijing 100048, China. 2160902148@cnu.edu.cn.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30011803

Citation

Qi, Mengxi, et al. "Analysis of the Characteristics and Sources of Carbonaceous Aerosols in PM2.5 in the Beijing, Tianjin, and Langfang Region, China." International Journal of Environmental Research and Public Health, vol. 15, no. 7, 2018.
Qi M, Jiang L, Liu Y, et al. Analysis of the Characteristics and Sources of Carbonaceous Aerosols in PM2.5 in the Beijing, Tianjin, and Langfang Region, China. Int J Environ Res Public Health. 2018;15(7).
Qi, M., Jiang, L., Liu, Y., Xiong, Q., Sun, C., Li, X., Zhao, W., & Yang, X. (2018). Analysis of the Characteristics and Sources of Carbonaceous Aerosols in PM2.5 in the Beijing, Tianjin, and Langfang Region, China. International Journal of Environmental Research and Public Health, 15(7). https://doi.org/10.3390/ijerph15071483
Qi M, et al. Analysis of the Characteristics and Sources of Carbonaceous Aerosols in PM2.5 in the Beijing, Tianjin, and Langfang Region, China. Int J Environ Res Public Health. 2018 07 13;15(7) PubMed PMID: 30011803.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Analysis of the Characteristics and Sources of Carbonaceous Aerosols in PM2.5 in the Beijing, Tianjin, and Langfang Region, China. AU - Qi,Mengxi, AU - Jiang,Lei, AU - Liu,Yixuan, AU - Xiong,Qiulin, AU - Sun,Chunyuan, AU - Li,Xing, AU - Zhao,Wenji, AU - Yang,Xingchuan, Y1 - 2018/07/13/ PY - 2018/06/02/received PY - 2018/07/06/revised PY - 2018/07/08/accepted PY - 2018/7/18/entrez PY - 2018/7/18/pubmed PY - 2019/1/17/medline KW - PM2.5 KW - carbonaceous aerosols KW - elemental carbon KW - organic carbon KW - source analyses JF - International journal of environmental research and public health JO - Int J Environ Res Public Health VL - 15 IS - 7 N2 - PM2.5 samples from Beijing, Tianjin, and Langfang were simultaneously collected from 20 November 2016 to 25 December 2016, and the organic carbon (OC) and elemental carbon (EC) content in the samples were measured and analyzed. The pollution characteristics and sources of OC and EC in atmospheric PM2.5 for three adjacent cities were discussed. The average mass concentrations of OC in PM2.5 in Beijing, Tianjin, and Langfang were 27.93 ± 23.35 μg/m³, 25.27 ± 12.43 μg/m³, and 52.75 ± 37.97 μg/m³, respectively, and the mean mass concentrations of EC were 6.61 ± 5.13 μg/m³, 6.14 ± 2.84 μg/m³, and 12.06 ± 6.81 μg/m³, respectively. The average mass concentration of total carbon (TC) accounted for 30.5%, 24.8%, and 49% of the average mass concentration of PM2.5 in the atmosphere. The total carbonaceous matter (TCA) in Beijing, Tianjin, and Langfang was 51.29, 46.57, and 96.45 μg/m³, respectively. The TCA was the main component of PM2.5 in the region. The correlation between OC and EC in the three cities showed R² values of 0.882, 0.633, and 0.784 for Beijing, Tianjin, and Langfang, respectively, indicating that the sources of urban carbonaceous aerosols had good consistency and stability. The OC/EC values of the three sampling points were 4.48 ± 1.45, 4.42 ± 1.77, and 4.22 ± 1.29, respectively, considerably greater than 2, indicating that the main sources of pollution were automobile exhaust, and the combustion of coal and biomass. The OC/EC minimum ratio method was used to estimate the secondary organic carbon (SOC) content in Beijing, Tianjin and Langfang. Their values were 10.73, 10.71, and 19.51, respectively, which accounted for 38%, 42%, and 37% of the average OC concentration in each city, respectively. The analysis of the eight carbon components showed that the main sources of pollutants in Beijing, Tianjin, and Langfang were exhaust emissions from gasoline vehicles, but the combustion of coal and biomass was relatively low. The pollution of road dust was more serious in Tianjin than in Beijing and Langfang. The contribution of biomass burning and coal-burning pollution sources to atmospheric carbon aerosols in Langfang was more prominent than that of Beijing and Tianjin. SN - 1660-4601 UR - https://www.unboundmedicine.com/medline/citation/30011803/Analysis_of_the_Characteristics_and_Sources_of_Carbonaceous_Aerosols_in_PM2_5_in_the_Beijing_Tianjin_and_Langfang_Region_China_ L2 - http://www.mdpi.com/resolver?pii=ijerph15071483 DB - PRIME DP - Unbound Medicine ER -