北京市天坛地区可吸入颗粒物生物活性研究  

Study of Bioreactivity of Inhalable Particles in the Temple of Heaven Area of Beijing

作　　者：胡高硕[1,2] 沈蓉蓉[1] 王静[1] 黄宇婷[1,3] 邵龙义[1] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京100029 [3]北京工业职业技术学院,北京100042

出　　处：《北京工业职业技术学院学报》2010年第1期1-5,共5页Journal of Beijing Polytechnic College

基　　金：教育部科技创新工程重大项目培育资金资助项目(705022);高等学校博士学科点专项科研基金项目(20070290007)

摘　　要：利用质粒DNA损伤评价方法研究了北京市天坛地区2007年可吸入颗粒物(PM10)的毒理学特征,同时利用高分辨率场发射扫描电镜(FESEM)和图像分析技术(IA)研究了区内可吸入颗粒物的微观形貌类型及百分含量特征。结果表明,天坛地区PM10生物活性具有明显季节性差变化,从高到低依此为:冬季>夏季>秋季>春季。在天坛地区大气PM10中识别出烟尘集合体、燃煤飞灰、矿物和超细未知颗粒等4种单颗粒类型,其中烟尘集合体与颗粒物毒性呈正相关关系,冬季PM10的较高的生物活性与较高的烟尘集合体的数量百分比有紧密关系。The toxicology of the PM10 samples collected from the Temple of Heaven （TOH） area in Beijing during 2007 was investigated by the plasmid DNA assay. The morphological types of the individual particles in PM10 was investigated by the high resolution Field Emission Scanning Electron Microscopy （FESEM） and image analyzer. The results showed that bioreactivity Or toxicity of PM10 in the TOH area has a seasonal variation, with the winter samples being most toxic, followed by the summer, autumn, and spring in descending order. Four main morphological types of particles were recognized, including soot aggregates, fly ashes, minerals and unknown fine particles. The percentages of soot aggregates demonstrated an obvious negative correlation with the TD20 values, indicating that the soot aggregates made a bigger contribution to the toxicity of the PM10. The PM10 in winter contained a higher proportion of soot aggregates by number and thus had a higher toxicity compared to other seasons.

关 键 词：PM10 微观特征 生物活性 天坛地区 北京 

分 类 号：X513[环境科学与工程—环境工程]