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Characteristics of single atmospheric particles in a heavily polluted urban area of China: size distributions and mixing states
Li, Li1; Wang, Qiyuan1,2; Zhang, Xu3; She, Yuanyuan4; Zhou, Jiamao1; Chen, Yang5; Wang, Ping6; Liu, Suixin1; Zhang, Ting1; Dai, Wenting1
2019-04-01
摘要To investigate the chemical composition, size distribution, and mixing state of aerosol particles on heavy pollution days, single-particle aerosol mass spectrometry was conducted during 9-26 October 2015 in Xi'an, China. The measured particles were classified into six major categories: biomass burning (BB) particles, K-secondary particles, elemental carbon (EC)-related particles, metal-containing particles, dust, and organic carbon (OC) particles. BB and EC-related particles were the dominant types during the study period and mainly originated from biomass burning, vehicle emissions, and coal combustion. According to the ambient air quality index, two typical episodes were defined: clean days (CDs) and polluted days (PDs). Accumulation of BB particles and EC-related particles was the main reason for the pollution in Xi'an. Most types of particle size were larger on PDs than CDs. Each particle type was mixed with secondary species to different degrees on CDs and PDs, indicating that atmospheric aging occurred. The mixing state results demonstrated that the primary tracers were oxidized or vanished and that the amount of secondary species was increased on PDs. This study provides valuable information and a dataset to help control air pollution in the urban areas of Xi'an.
关键词Single particle Chemical composition Size distribution Mixing state SPAMS Biomass burning
DOI10.1007/s11356-019-04579-3
发表期刊ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
卷号26期号:12页码:11730-11742
通讯作者Wang, Qiyuan(wangqy@ieecas.cn) ; Cao, Junji(cao@loess.llqg.ac.cn)
收录类别SCI
WOS记录号WOS:000467887600038
语种英语