| 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 Author | Shen, Zhenxing(znhen@mail.xjtu.edu.cn) ; Wang, Xin(xin.wang@chbe.gatech.edu) |
| 2021-05-01 | |
| Source Publication | GEOHEALTH
 |
| ISSN | 2471-1403 |
| Volume | 5Issue:5Pages:11 |
| Abstract | 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. |
| Keyword | bioaerosol diurnal variation inhalation size distribution |
| DOI | 10.1029/2021GH000411 |
| WOS Keyword | PARTICULATE MATTER CONCENTRATIONS ; POLYCYCLIC AROMATIC-HYDROCARBONS ; TOTAL AIRBORNE MICROBES ; OUTDOOR ENVIRONMENTS ; SEASONAL-VARIATIONS ; VIABLE BIOAEROSOLS ; FUNGAL SPORES ; HAZE EPISODES ; PM2.5 ; AIR |
| Indexed By | SCI ; SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Environmental Sciences & Ecology ; Public, Environmental & Occupational Health |
| Funding Organization | 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 Subject | Environmental Sciences ; Public, Environmental & Occupational Health |
| WOS ID | WOS:000654354800003 |
| Publisher | AMER GEOPHYSICAL UNION |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ieecas.cn/handle/361006/16691 |
| Collection | 粉尘与环境研究室 |
| Corresponding Author | Shen, Zhenxing; Wang, Xin |
| Affiliation | 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 |
| 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. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment