| 北京雾霾天气生物气溶胶浓度和粒径特征 |
| 摘要点击 5055 全文点击 2262 投稿时间：2014-04-18 修订日期：2014-05-29 |
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| 中文关键词 雾霾 细菌气溶胶 真菌气溶胶 PM2.5(AQI) Spearman’s相关性 粒径分布 |
| 英文关键词 haze airborne bacteria airborne fungi PM2.5 (AQI) Spearman’s correlation coefficients size distribution |
| 作者 | 单位 | E-mail | | 高敏 | 北京市农林科学院生物技术研究中心, 农业基因资源与生物技术北京市重点实验室, 北京 100097 | gaomin@baafs.net.cn | | 仇天雷 | 北京市农林科学院生物技术研究中心, 农业基因资源与生物技术北京市重点实验室, 北京 100097 | | | 贾瑞志 | 北京市农林科学院生物技术研究中心, 农业基因资源与生物技术北京市重点实验室, 北京 100097
中国农业大学生物学院, 北京 100193 | | | 韩梅琳 | 北京市农林科学院生物技术研究中心, 农业基因资源与生物技术北京市重点实验室, 北京 100097 | | | 宋渊 | 中国农业大学生物学院, 北京 100193 | | | 王旭明 | 北京市农林科学院生物技术研究中心, 农业基因资源与生物技术北京市重点实验室, 北京 100097 | wangxuming@baafs.net.cn |
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| 中文摘要 |
| 近年来北京雾霾天气频发，空气颗粒物聚集是导致雾霾天气发生的主要原因之一. 作为一种重要的空气颗粒物，生物气溶胶对人体健康存在危害. 本研究调查了雾霾天气时，生物气溶胶浓度和粒径分布规律；对其同空气质量指数PM2.5（AQI），环境温度和湿度间的Spearman’s相关性进行了研究；分析了冬夏两季重度雾霾天气时，生物气溶胶粒径分布规律. 结果表明，生物气溶胶浓度与PM2.5（AQI）呈负相关，与环境温度呈正相关. 环境湿度与细菌气溶胶浓度呈负相关而与真菌气溶胶浓度呈正相关. 在冬季，最大浓度细菌和真菌气溶胶分别在4.5~7.0 μm和2.1~3.3 μm粒径范围内检测到，而夏季最高浓度细菌和真菌气溶胶均分布在3.3~4.5 μm范围内. 本研究结果将为不同雾霾天气下，评价生物气溶胶对人类健康造成的危害提供基础数据. |
| 英文摘要 |
| 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. |
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