保定市PM_(2.5)形貌特征、有机物污染水平及来源识别  

Microscopic morphology,organic pollution level and source identification of PM_(2.5) in Baoding City

作　　者：于泊蕖[1] 王永慧[1] 刘芃岩[1] 杨金新[1] 张瑞瑞[1] 甄一尘 

机构地区：[1]河北大学化学与环境科学学院,保定071002

出　　处：《环境化学》2017年第2期241-247,共7页Environmental Chemistry

基　　金：国家自然科学基金(21377033);河北省教育厅重点项目(ZD20131046)资助~~

摘　　要：在高倍数冷场扫描电镜下对PM_(2.5)样品进行了微观形貌特征分析,发现其组成以烟尘集合体及飞灰为主;并以气相色谱-质谱联用技术为检测手段,对保定市雾霾高发期内(2015年11月—2016年3月)不同污染程度下PM_(2.5)样品上的有机污染物进行了定性定量分析,结果共检测到有机污染物83种,主要为正构烷烃类15种(0.02—1154.49μg·g-1)、优先监测PAHs类12种(2.36—945.17μg·g-1),其余为酞酸酯、醛、酮及苯系物等;通过PM_(2.5)质量浓度、冷场扫描电镜微观形貌图像及样品上的有机污染物定性定量等测定结果的分析,对保定市城区雾霾高发期PM_(2.5)上污染物来源进行了解析.The micromorphology of PM_（2.5）was analyzed by the high magnification scanning electron microscopy（SEM）.Results showed that soot aggregate and fly ash were the main pollutants.In addition,using GC-MS hyphenated techniques,12 groups of PM_（2.5）samples collected in Baoding city during heavy haze period（Nov.2015—Mar.2016） with different pollution levels were qualitatively and quantitatively analyzed.The results showed that 83 organic compounds were detected with 15n-alkanes（0.02—1154.49 μg·g-1） and 12 PAHs（2.36—945.17 μg·g-1） being the major conpounds.The others were phthalate esters,aldehydes,ketones,benzene series etc.According to the mass concentration, micromorphology of PM_（2.5）combined with qualitative and quantitative analysis results of the organic pollutants on PM_（2.5）samples,the sources of pollutants on PM_（2.5）from Baoding city was analyzed.

关 键 词：PM2.5 形貌特征 正构烷烃 多环芳烃 源识别 

分 类 号：X513[环境科学与工程—环境工程]