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Characteristics and Source Apportionment of Black Carbon in the Atmosphere of Typical Plateau City in Southwest China (Vol. 49, No.4, Tot No.342 2021) TEXT SIZE: A A A

ZHOU Ruiguo1,3, LIANG Longchao2,3, XIAO Dean4, DONG Xian2, CHEN Zhuo2,5, QIU Guangle3

(1. Weifang Institute of Exploration and Mapping, Weifang 261041, China;
2. School of Chemistry and Material Science, Guizhou Normal University, Guiyang 550001, China;
3. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;
4. College of Resource and Environmental Engineering, Guizhou Institute of Technology, Guiyang 550003, China;
5. State Key Laboratory of Atmospheric Fine Particles and Air Pollution Chemistry of Guiyang,Guiyang 550001, China)

Abstract: Atmospheric fine particle in Guiyang City was collected with Laoying Model 2050 during May 2016 to April 2017 and measured for black carbon (BC) using Aethalometer (SootScanTM Model OT21). Results showed that concentrations of BC ranged from 1.17 to 12.77 μg/m3, with an average of 5.19±1.91 μg/m3. Seasonal variation of BC was in the order of winter > autumn > spring ≈ summer. Significantly positive correlations between BC and PM2.5 (R2=0.64, P < 0.01) as well as between potassium ion (R2=0.31, P < 0.01) were observed. Sources apportionment suggested BC originated from fossil fuels (51.9%), biomass burning dust (32.4%), and catering fume emissions (15.7%). Cluster analyses on back-trajectories illustrated that the impacted air mass mainly came from domestic regions, and was controlled by dominant wind directions in Guiyang.

Key word: Black carbon; Seasonal variation; Influencing factors; Source apportionment

EARTH AND ENVIRONMENT Vol.49, No.4, Tot No.342, 2021, Page 375-380

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