title: [Concentration and size distribution of bioaerosols at non-haze and haze days in Beijing].
abstract: In recent years, haze has been observed frequently in Beijing. Haze was one of the atmospheric phenomena caused by the accumulation of particulate matter. As an important fraction of particular matter, bioaerosol could potentially cause significantly negative health effects. In this study, we detected the concentration and size distribution of viable bioaerosol during non-haze and haze days, analyzed correlation of viable bioaerosol with the ambient temperature and relative humidity using Spearman's correlation coefficient and finally detected the changing of size distribution of viable bioaerosol in summer and winter. Results indicated that concentrations of viable bioaerosol exhibited a negative correlation with Air Quality Index (AQI) of PM2.5 and positive correlation with temperature. Relative humidity had a negative correlation with airborne bacteria while positive correlation with airborne fungi. The highest concentration of airborne bacteria and fungi were detected at size arrange of 4.5-7.0 μm and 2. 1-3.3 μm in the winter, respectively. In the summer, both the highest concentration of airborne bacteria and fungi were observed at size arrange of 3.3-4.5 μm. The results of this study will provide the basis data for hazard evaluation of bioaerosol on human health at non-haze and haze days.
authors.forename: Min
authors.initials: M
authors.lastname: Gao
authors.forename: Tian-lei
authors.initials: TL
authors.lastname: Qiu
authors.forename: Rui-zhi
authors.initials: RZ
authors.lastname: Jia
authors.forename: Mei-lin
authors.initials: ML
authors.lastname: Han
authors.forename: Yuan
authors.initials: Y
authors.lastname: Song
authors.forename: Xu-ming
authors.initials: XM
authors.lastname: Wang
mesh_terms: D000336:Aerosols / Q000032:analysis*; D000391:Air Microbiology; D000393:Air Pollutants / Q000032:analysis*; D001419:Bacteria / Q000302:isolation & purification*; D002681:China; D002947:Cities; D004784:Environmental Monitoring; D005658:Fungi / Q000302:isolation & purification*; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis; D012621:Seasons; D013696:Temperature
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D052638:Particulate Matter