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Characterization, mixing state, and evolution of urban single particles in Xi'an (China) during wintertime haze days.
Sci Total Environ 2016; 573:937-945ST

Abstract

A Single Particle Aerosol Mass Spectrometer (SPAMS) was deployed in the urban area of Xi'an to investigate size-resolved chemical composition and mixing state of single particles during the heavy haze episode occurred from January 13 to January 27 in 2013. Nine major single particle types were resolved with ART-2a algorithm including biomass burning (BB), Potassium-Secondary (KSec), elemental and organic Carbon (ECOC), sodium-potassium-rich ECOC (NaKECOC), sodium-potassium-rich-secondary (NaKSec), EC, OC, and Dust. Daily PM2.5 mass concentration was 213±122μgm-3. ~96% of the ambient particles were carbonaceous and internally mixed with secondary species such as sulfate and nitrate. The major particle types were from combustion sources, including coal burning, biomass burning, and vehicle exhaust. Mixing state analysis suggests gas-to-particle conversion was an important mechanism forming organic species during the winter haze episode. The relative abundances of the aged particle types, such as KSec and NaKSec increased with the elevated RH when RH<80%. The fraction of aged particles in terms of number concentration was prominent during high levels of PM2.5 under stagnant air conditions. This study gained new knowledge on atmospheric aerosol formation and evolution in urban environment heavy winter haze condition.

Authors+Show Affiliations

Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China; Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China.Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China. Electronic address: cao@loess.llqg.ac.cn.Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China; Laboratory of Atmospheric Chemistry, Paul Scherrer Institut (PSI), CH-5232 Villigen PSI, Switzerland.Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China.Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China.Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27599057

Citation

Chen, Yang, et al. "Characterization, Mixing State, and Evolution of Urban Single Particles in Xi'an (China) During Wintertime Haze Days." The Science of the Total Environment, vol. 573, 2016, pp. 937-945.
Chen Y, Cao J, Huang R, et al. Characterization, mixing state, and evolution of urban single particles in Xi'an (China) during wintertime haze days. Sci Total Environ. 2016;573:937-945.
Chen, Y., Cao, J., Huang, R., Yang, F., Wang, Q., & Wang, Y. (2016). Characterization, mixing state, and evolution of urban single particles in Xi'an (China) during wintertime haze days. The Science of the Total Environment, 573, pp. 937-945. doi:10.1016/j.scitotenv.2016.08.151.
Chen Y, et al. Characterization, Mixing State, and Evolution of Urban Single Particles in Xi'an (China) During Wintertime Haze Days. Sci Total Environ. 2016 Dec 15;573:937-945. PubMed PMID: 27599057.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Characterization, mixing state, and evolution of urban single particles in Xi'an (China) during wintertime haze days. AU - Chen,Yang, AU - Cao,Junji, AU - Huang,Rujin, AU - Yang,Fumo, AU - Wang,Qiyuan, AU - Wang,Yichen, Y1 - 2016/09/04/ PY - 2016/07/10/received PY - 2016/08/17/revised PY - 2016/08/21/accepted PY - 2016/9/7/pubmed PY - 2018/3/2/medline PY - 2016/9/7/entrez KW - Evolution KW - Haze KW - Mixing state KW - Single particle SP - 937 EP - 945 JF - The Science of the total environment JO - Sci. Total Environ. VL - 573 N2 - A Single Particle Aerosol Mass Spectrometer (SPAMS) was deployed in the urban area of Xi'an to investigate size-resolved chemical composition and mixing state of single particles during the heavy haze episode occurred from January 13 to January 27 in 2013. Nine major single particle types were resolved with ART-2a algorithm including biomass burning (BB), Potassium-Secondary (KSec), elemental and organic Carbon (ECOC), sodium-potassium-rich ECOC (NaKECOC), sodium-potassium-rich-secondary (NaKSec), EC, OC, and Dust. Daily PM2.5 mass concentration was 213±122μgm-3. ~96% of the ambient particles were carbonaceous and internally mixed with secondary species such as sulfate and nitrate. The major particle types were from combustion sources, including coal burning, biomass burning, and vehicle exhaust. Mixing state analysis suggests gas-to-particle conversion was an important mechanism forming organic species during the winter haze episode. The relative abundances of the aged particle types, such as KSec and NaKSec increased with the elevated RH when RH<80%. The fraction of aged particles in terms of number concentration was prominent during high levels of PM2.5 under stagnant air conditions. This study gained new knowledge on atmospheric aerosol formation and evolution in urban environment heavy winter haze condition. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/27599057/Characterization_mixing_state_and_evolution_of_urban_single_particles_in_Xi'an__China__during_wintertime_haze_days_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(16)31853-8 DB - PRIME DP - Unbound Medicine ER -