徐州市城郊雾霾天气中PM_(2.5)物化及微生物特征分析

Physicochemical and Microbial Characteristics of PM_(2.5) in Haze Weather in the Suburb of Xuzhou City

选择雾霾天气对徐州市城郊大气PM_(2.5)采样,利用SEM/EDS对采集后PM_(2.5)颗粒物的物化特性进行分析,并利用DGGE法分析PM_(2.5)颗粒物上微生物的群落结构。结果表明:滤膜上PM_(2.5)大多为亚微米系颗粒物,颗粒物多数表面光滑无棱角,存在C、O、S、Si、Al、K、Na、Ca、Mg、Fe等元素;PM_(2.5)中的微生物种群分属于3个细菌类群:壁厚菌门,β变形细菌门和绿弯菌门。

PM2.5 was sampled in the suburb of Xuzhou city in the fog and haze weather. SEM/EDS were used to determine the physicochemical characteristics of the samples; meanwhile, DGGE （Denaturing gradient gel electropboresis） method was applied to investigate microbial community structure. The SEM observation showed that collected PM2.5 was mainly consisting ofsubmicron particles, and the surface was mostly smooth. The microorganism in PM2.5 belongs to three bacteria groups： Firmicutes,8-proteohacteria and Chloroflexi.