摘要
通过对北京市元大都遗址公园内不同林地类型及其旁边道路空气颗粒物及微生物浓度的研究,得出:空气颗粒物中直径大于10μm的粗颗粒所占比例较小,而人可以通过呼吸吸入的PM10所占比例相对较高,对人体最为有害的PM2.5所占比例也很小;对照点(道路)的PM10、TSP浓度都显著高于其临近绿地的浓度,可见绿地具有显著的滞尘作用;元大都公园各林地中PM10浓度都超过了国家环境质量标准中的Ⅱ级标准,是标准的1.36~2.54倍,对人体最为有害的PM2.5浓度只有个别绿地超标;空气微生物浓度与空气TSP、PM10具有极显著相关性,与PM2.5、PM1相关关系不显著。
By researching the airborne particulates and airborne microbes of different forest type in Yuan Dynasty capital city wall relics park and its' adjacent roads,the results indicated that the proportion of particulates whose diameters were bigger than 10?μm was low in the airborne particulates,but the respirable particulates PM_(10) was relatively higher,whereas the PM_(2.5) was the most harmful to people and had the very small proportion.The PM_(10),TSP concentrations of the contrasted cites(roads) were significant higher than that of the adjacent forests,which showed that forest had the effect of dust removal.In Yuan Dynasty park,the concentration of PM_(10) in those forests was above the second level of station environmental quality standard and was the 1.36～2.54 times of the standard,but for the concentration of PM_(2.5),only a few above the standard.The relations between the concentration of airborne microbes with TSP、PM_(10) were significant,and were not significant with PM_(2.5)、PM_1.
出处
《城市环境与城市生态》
CAS
CSCD
2006年第5期22-25,共4页
Urban Environment & Urban Ecology
基金
国家科技部科研院所社会公益研究专项资助项目(2004DIB1J031)
