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Source apportionment of black carbon during winter in Beijing.
Sci Total Environ 2018; 618:531-541ST

Abstract

Black carbon (BC) in PM2.5 was measured at an urban site in Beijing during winter 2015 using an aethalometer. The characteristics and sources of BC during pollution episodes and clean days were analyzed. The average hourly mass concentration of BC during the study period was 5.31±6.27μg/m3. BC was highly correlated with PM2.5 (R2=0.80), with its concentration ranging from 0.17μg/m3 in clean days to 35.33μg/m3 in haze days. Source apportionment results showed that the average contribution of liquid fuel source (e.g., vehicle emission) to BC was around 50% in clean days. While during the pollution episodes, solid fuel sources including coal combustion and biomass burning were the predominant sources, accounting for 61-83% of BC. Specific source tracers suggested that coal combustion and biomass burning dominated in different pollution episodes. Ratios of BC/PM2.5 and BC/CO as well as source tracers provided further supportive evidences for the source apportionment results. Our findings suggest that it is more important to control solid fuel sources such as coal combustion for BC abatement in Beijing during haze days, while liquid fuel source (e.g., vehicle emission) plays a relatively more important role in clean days compared to pollution episodes.

Authors+Show Affiliations

SKL-ESPC and BIC-ESAT, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.SKL-ESPC and BIC-ESAT, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.SKL-ESPC and BIC-ESAT, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China. Electronic address: mzheng@pku.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29149737

Citation

Liu, Yue, et al. "Source Apportionment of Black Carbon During Winter in Beijing." The Science of the Total Environment, vol. 618, 2018, pp. 531-541.
Liu Y, Yan C, Zheng M. Source apportionment of black carbon during winter in Beijing. Sci Total Environ. 2018;618:531-541.
Liu, Y., Yan, C., & Zheng, M. (2018). Source apportionment of black carbon during winter in Beijing. The Science of the Total Environment, 618, pp. 531-541. doi:10.1016/j.scitotenv.2017.11.053.
Liu Y, Yan C, Zheng M. Source Apportionment of Black Carbon During Winter in Beijing. Sci Total Environ. 2018 Mar 15;618:531-541. PubMed PMID: 29149737.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Source apportionment of black carbon during winter in Beijing. AU - Liu,Yue, AU - Yan,Caiqing, AU - Zheng,Mei, Y1 - 2017/11/14/ PY - 2017/09/27/received PY - 2017/11/02/revised PY - 2017/11/04/accepted PY - 2017/11/18/pubmed PY - 2017/11/18/medline PY - 2017/11/18/entrez KW - Aethalometer model KW - Beijing KW - Black carbon KW - Haze KW - Source apportionment SP - 531 EP - 541 JF - The Science of the total environment JO - Sci. Total Environ. VL - 618 N2 - Black carbon (BC) in PM2.5 was measured at an urban site in Beijing during winter 2015 using an aethalometer. The characteristics and sources of BC during pollution episodes and clean days were analyzed. The average hourly mass concentration of BC during the study period was 5.31±6.27μg/m3. BC was highly correlated with PM2.5 (R2=0.80), with its concentration ranging from 0.17μg/m3 in clean days to 35.33μg/m3 in haze days. Source apportionment results showed that the average contribution of liquid fuel source (e.g., vehicle emission) to BC was around 50% in clean days. While during the pollution episodes, solid fuel sources including coal combustion and biomass burning were the predominant sources, accounting for 61-83% of BC. Specific source tracers suggested that coal combustion and biomass burning dominated in different pollution episodes. Ratios of BC/PM2.5 and BC/CO as well as source tracers provided further supportive evidences for the source apportionment results. Our findings suggest that it is more important to control solid fuel sources such as coal combustion for BC abatement in Beijing during haze days, while liquid fuel source (e.g., vehicle emission) plays a relatively more important role in clean days compared to pollution episodes. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/29149737/Source_apportionment_of_black_carbon_during_winter_in_Beijing_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(17)33111-X DB - PRIME DP - Unbound Medicine ER -