首页  |  本刊简介  |  编委会  |  投稿须知  |  订阅与联系  |  微信  |  出版道德声明  |  Ei收录本刊数据  |  封面
西安市秋冬季不同空气质量下可培养微生物气溶胶浓度和粒径分布
摘要点击 2254  全文点击 711  投稿时间:2017-03-08  修订日期:2017-05-31
查看HTML全文 查看全文  查看/发表评论  下载PDF阅读器
中文关键词  空气质量  细菌气溶胶  真菌气溶胶  颗粒物  气态污染物
英文关键词  air quality  airborne bacteria  airborne fungi  particulate matter  air pollutants
作者单位E-mail
李婉欣 长安大学环境科学与工程学院, 西安 710054 liwanx01@163.com 
路瑞 长安大学环境科学与工程学院, 西安 710054  
谢铮胜 长安大学环境科学与工程学院, 西安 710054  
王金龙 长安大学环境科学与工程学院, 西安 710054  
范春兰 长安大学环境科学与工程学院, 西安 710054  
刘鹏霞 长安大学环境科学与工程学院, 西安 710054  
李彦鹏 长安大学环境科学与工程学院, 西安 710054
长安大学旱区水文与生态效应教育部重点实验室, 西安 710054 
liyanp01@chd.edu.cn 
中文摘要
      利用Anderson空气微生物采样器对西安市2014年9月~2015年1月间可培养微生物气溶胶进行采样、培养,分析不同空气质量下其浓度与粒径变化特征,并对其与颗粒污染物(PM2.5、PM10)、气象参数(温度、相对湿度)和其它气态污染物(NO2、SO2、O3)进行主成分+多元线性回归分析.结果显示,可培养细菌和真菌气溶胶浓度范围分别为97~1909 CFU·m-3,92~1737 CFU·m-3.随空气污染程度加深,两种微生物气溶胶浓度均呈现增加趋势;细菌气溶胶粒径分布向粗颗粒偏移;而真菌气溶胶在低污染时呈正态分布,高污染时粒径峰值向细颗粒偏移.主成分分析结果显示,可培养微生物气溶胶主要与灰霾、太阳辐射和相对湿度有关.多元线性回归结果表明,细菌气溶胶与灰霾呈显著正相关(P<0.05),与太阳辐射呈不显著负相关,与湿度呈不显著正相关;真菌气溶胶与灰霾、太阳辐射和相对湿度均呈不显著正相关.研究结果可以为评估微生物气溶胶所引起的环境与健康效应提供基础数据.
英文摘要
      The concentration and size distribution of culturable bacteria and fungi were studied in Xi'an city at various air quality levels. The culturable bioaerosols were collected by an Andersen bioaerosol aerosol sampler between Sept. 2014 and Jan. 2015. Principal component analysis and multiple linear regressions were applied to link the concentrations with meteorological conditions including ambient temperature and relative humidity, as well as the levels of air pollutants such as PM2.5, PM10, NO2, SO2, and O3. These measured results showed that the concentration of culturable bacteria and fungi were in the ranges of 97-1909 CFU·m-3 and 92-1737 CFU·m-3, respectively. The concentrations of culturable bioaerosols increased along with a deterioration in air quality. The size distribution of the bacteria migrated to coarse particles. Fungal aerosols showed a normal distribution at low pollution levels, while for a high levels, they preferenced fine particles. Results from the principal component analysis (PCA) indicate that the concentration of culturable bioaerosols is mainly influenced by haze, solar radiation, and relative humidity. Multiple linear regression analysis showed that bacterial aerosol concentrations are positively correlated with haze (P<0.05) and relative humidity, while no significant negative correlations with solar radiation exists. Fungal aerosol concentrations did not have significant positive correlations with haze, solar radiation, or relative humidity. The results of this study will provide basic data for evaluating the effects of bioaerosols on human health and the environment.

您是第51724035位访客
主办单位:中国科学院生态环境研究中心 单位地址:北京市海淀区双清路18号
电话:010-62941102 邮编:100085 E-mail: hjkx@rcees.ac.cn
本系统由北京勤云科技发展有限公司设计  京ICP备05002858号-2