IEECAS OpenIR  > 粉尘与环境研究室
Diurnal Variations of Size-Resolved Bioaerosols During Autumn and Winter Over a Semi-Arid Megacity in Northwest China
Yang, Liu1,2; Shen, Zhenxing1,2; Wang, Diwei1; Wei, Junqiang1; Wang, Xin3; Sun, Jian1; Xu, Hongmei1; Cao, Junji2
Corresponding AuthorShen, Zhenxing(znhen@mail.xjtu.edu.cn) ; Wang, Xin(xin.wang@chbe.gatech.edu)
2021-05-01
Source PublicationGEOHEALTH
ISSN2471-1403
Volume5Issue:5Pages:11
AbstractBioaerosols have a major negative effect on air quality and on public health by causing the spread of diseases. This study evaluated the bioaerosol composition and variation in a semi-arid megacity of northwest China from October 2019 to January 2020 using an Andersen six-stage impactor sampler. The size distribution, diurnal variations of the concentrations of airborne bacteria, airborne fungi, and total airborne microbes (TAM) were investigated in autumn and winter. The mean concentrations of airborne bacteria, fungi, and TAM were 523.5 +/- 301.1 colony-forming units (CFU)/m(3), 1318.9 +/- 447.8 CFU/m(3), and (7.25 +/- 1.90) x 10(6) cells/m(3), respectively, in autumn and 581 +/- 305.4 CFU/m(3), 1234.4 +/- 519.9 CFU/m(3), and (5.96 +/- 1.65) x 10(6) cells/m(3), respectively, in winter. The mean bioaerosol concentrations were slightly higher on nonhaze days than on haze days, but the difference was not statistically significant. Higher ambient particulate matter levels and atmospheric oxidation capacity inhibited bacteria survival. The diurnal maximum bioaerosol concentration was observed in the morning in autumn, whereas in winter, bioaerosols did not exhibit such a distribution, the impact of human activities on bioaerosols was still uncertain. The size of airborne bacteria exhibited a bimodal distribution, whereas a unimodal pattern was observed for fungi and TAM. Most bacteria, fungi, and TAM were distributed in the respirable ranges from trachea and primary bronchi to alveoli, indicating that bioaerosols have a high risk of being inhaled and causing respiratory diseases in Xi'an.
Keywordbioaerosol diurnal variation inhalation size distribution
DOI10.1029/2021GH000411
WOS KeywordPARTICULATE MATTER CONCENTRATIONS ; POLYCYCLIC AROMATIC-HYDROCARBONS ; TOTAL AIRBORNE MICROBES ; OUTDOOR ENVIRONMENTS ; SEASONAL-VARIATIONS ; VIABLE BIOAEROSOLS ; FUNGAL SPORES ; HAZE EPISODES ; PM2.5 ; AIR
Indexed BySCI ; SCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFC0212205] ; Natural Science Foundation of Shaanxi Province, China[2021JQ-027] ; National Natural Science Foundation of China[41877383] ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS[SKLLQG1919]
WOS Research AreaEnvironmental Sciences & Ecology ; Public, Environmental & Occupational Health
Funding OrganizationNational Key R&D Program of China ; Natural Science Foundation of Shaanxi Province, China ; National Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS
WOS SubjectEnvironmental Sciences ; Public, Environmental & Occupational Health
WOS IDWOS:000654354800003
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/16691
Collection粉尘与环境研究室
Corresponding AuthorShen, Zhenxing; Wang, Xin
Affiliation1.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, SKLLQG, Xian, Peoples R China
3.Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA
Recommended Citation
GB/T 7714
Yang, Liu,Shen, Zhenxing,Wang, Diwei,et al. Diurnal Variations of Size-Resolved Bioaerosols During Autumn and Winter Over a Semi-Arid Megacity in Northwest China[J]. GEOHEALTH,2021,5(5):11.
APA Yang, Liu.,Shen, Zhenxing.,Wang, Diwei.,Wei, Junqiang.,Wang, Xin.,...&Cao, Junji.(2021).Diurnal Variations of Size-Resolved Bioaerosols During Autumn and Winter Over a Semi-Arid Megacity in Northwest China.GEOHEALTH,5(5),11.
MLA Yang, Liu,et al."Diurnal Variations of Size-Resolved Bioaerosols During Autumn and Winter Over a Semi-Arid Megacity in Northwest China".GEOHEALTH 5.5(2021):11.
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