【摘要】：利用Anderson空氣微生物采樣器對西安市2014年9月~2015年1月間可培養(yǎng)微生物氣溶膠進行采樣、培養(yǎng),分析不同空氣質(zhì)量下其濃度與粒徑變化特征,并對其與顆粒污染物(PM_(2.5)、PM_(10))、氣象參數(shù)(溫度、相對濕度)和其它氣態(tài)污染物(NO_2、SO_2、O_3)進行主成分+多元線性回歸分析.結(jié)果顯示,可培養(yǎng)細(xì)菌和真菌氣溶膠濃度范圍分別為97~1 909CFU·m~(-3),92~1 737 CFU·m~(-3).隨空氣污染程度加深,兩種微生物氣溶膠濃度均呈現(xiàn)增加趨勢;細(xì)菌氣溶膠粒徑分布向粗顆粒偏移;而真菌氣溶膠在低污染時呈正態(tài)分布,高污染時粒徑峰值向細(xì)顆粒偏移.主成分分析結(jié)果顯示,可培養(yǎng)微生物氣溶膠主要與灰霾、太陽輻射和相對濕度有關(guān).多元線性回歸結(jié)果表明,細(xì)菌氣溶膠與灰霾呈顯著正相關(guān)(P0.05),與太陽輻射呈不顯著負(fù)相關(guān),與濕度呈不顯著正相關(guān);真菌氣溶膠與灰霾、太陽輻射和相對濕度均呈不顯著正相關(guān).研究結(jié)果可以為評估微生物氣溶膠所引起的環(huán)境與健康效應(yīng)提供基礎(chǔ)數(shù)據(jù).
[Abstract]:The cultured microbial aerosols in Xi'an City from September 2014 to January 2015 were sampled by Anderson air microbial sampler, and the variation characteristics of concentration and particle size under different air quality were analyzed. The principal component linear regression analysis was carried out with particle pollutants (PM_), PM_ (10), meteorological parameters (temperature, relative humidity) and other gaseous pollutants (NO_2,SO_2,O_3). The results showed that the concentrations of culturable bacteria and fungi aerosol were 97 鈮，

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