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Impact of reduced anthropogenic emissions on chemical characteristics of urban aerosol by individual particle analysis

文献类型：期刊论文

作者Li, Li1,4; Wang, Qiyuan1,2,3; Zhang, Yong1; Liu, Suixin1; Zhang, Ting1; Wang, Shuang1; Tian, Jie1; Chen, Yang5; Ho, Steven Sai Hang6; Han, Yongming1,2,3
刊名CHEMOSPHERE
出版日期2022-09-01
卷号303页码:11
ISSN号0045-6535
关键词COVID-19 Secondary formation Chemical characteristics Mixing state Individual particles
DOI10.1016/j.chemosphere.2022.135013
通讯作者Wang, Qiyuan(wangqy@ieecas.cn) ; Cao, Junji(jjcao@mail.iap.ac.cn)
英文摘要A single particle aerosol mass spectrometer was deployed in a heavily polluted area of China during a corona virus lockdown to explore the impact of reduced anthropogenic emissions on the chemical composition, size distributions, mixing state, and secondary formation of urban aerosols. Ten particle groups were identified using an adaptive resonance network algorithm. Increased atmospheric oxidation during the lockdown period (LP) resulted in a 42.2%-54% increase in the major NaK-SN particle fraction relative to the normal period (NP). In contrast, EC-aged particles decreased from 31.5% (NP) to 23.7% (LP), possibly due to lower emissions from motor vehicles and coal combustion. The peak particle size diameter increased from 440 nm during the NP to 500 nm during LP due to secondary particle formation. High proportions of mixed (NO3-)-N-62 indicate extensive particle aging. Correlations between secondary organic ((C2H3O+)-C-43, oxalate) and secondary inorganic species ((NO3-)-N-62, 97HSO4- and (NH4+)-N-18) versus oxidants (O-x = O-3 + NO2) and relative humidity (RH) indicate that increased atmospheric oxidation promoted the generation of secondary species, while the effects of RH were more complex. Differences between the NP and LP show that reductions in primary emissions had a remarkable impact on the aerosol particles. This study provides new insights into the effects of pollution emissions on atmospheric reactions and the specific aerosol types in urban regions.
资助项目Key Research and Development Program of Shaanxi Province[2018-ZDXM3-01] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2019402]
WOS研究方向Environmental Sciences & Ecology
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000813019400002
源URL[http://119.78.100.138/handle/2HOD01W0/16009]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Wang, Qiyuan; Cao, Junji
作者单位1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
3.Natl Observat & Res Stn Reg Ecol Environm Change, Xian, Shaanxi, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm CAS, Chongqing 400714, Peoples R China
6.Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA
7.Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Li, Li,Wang, Qiyuan,Zhang, Yong,et al. Impact of reduced anthropogenic emissions on chemical characteristics of urban aerosol by individual particle analysis[J]. CHEMOSPHERE,2022,303:11.
APA Li, Li.,Wang, Qiyuan.,Zhang, Yong.,Liu, Suixin.,Zhang, Ting.,...&Cao, Junji.(2022).Impact of reduced anthropogenic emissions on chemical characteristics of urban aerosol by individual particle analysis.CHEMOSPHERE,303,11.
MLA Li, Li,et al."Impact of reduced anthropogenic emissions on chemical characteristics of urban aerosol by individual particle analysis".CHEMOSPHERE 303(2022):11.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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