Diurnal Variations of Size-Resolved Bioaerosols During Autumn and Winter Over a Semi-Arid Megacity in Northwest China

doi:10.1029/2021GH000411

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, Liu 1,2; Shen, Zhenxing 1,2; Wang, Diwei 1; Wei, Junqiang 1; Wang, Xin 3; Sun, Jian 1; Xu, Hongmei 1; Cao, Junji 2
通讯作者	Shen, Zhenxing(znhen@mail.xjtu.edu.cn) ; Wang, Xin(xin.wang@chbe.gatech.edu)
	2021-05-01
发表期刊	GEOHEALTH
ISSN	2471-1403
卷号	5 期号:5 页码:11
摘要	Bioaerosols 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.
关键词	bioaerosol diurnal variation inhalation size distribution
DOI	10.1029/2021GH000411
关键词[WOS]	PARTICULATE MATTER CONCENTRATIONS ; POLYCYCLIC AROMATIC-HYDROCARBONS ; TOTAL AIRBORNE MICROBES ; OUTDOOR ENVIRONMENTS ; SEASONAL-VARIATIONS ; VIABLE BIOAEROSOLS ; FUNGAL SPORES ; HAZE EPISODES ; PM2.5 ; AIR
收录类别	SCI ; SCI
语种	英语
资助项目	National 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研究方向	Environmental Sciences & Ecology ; Public, Environmental & Occupational Health
项目资助者	National 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类目	Environmental Sciences ; Public, Environmental & Occupational Health
WOS记录号	WOS:000654354800003
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/16691
专题	粉尘与环境研究室
通讯作者	Shen, Zhenxing; Wang, Xin
作者单位	1.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
推荐引用方式 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.