摘要
为研究北京市春季大气颗粒物污染特性,2008年3月至2008年5月,对北京市西三环大气颗粒物进行采样分析。测定了总悬浮颗粒物(TSP)与可吸入颗粒物(PM10)的日平均质量浓度,使用扫描电子显微镜(SEM)观察大气颗粒物的微观形貌,并通过X射线能谱仪(EDX)对样品中的元素组成进行分析。结果表明,TSP和PM10日平均质量浓度以初春最高,春天次之,春夏交际最低;PM10/TSP以春夏交际最高,初春次之,春天最低;大气颗粒物形态有规则和不规则2类,以不规则形态居多,同时发现花粉颗粒存在。EDX分析表明,大气颗粒物所附着的重金属中Pb所占的质量分数最高,并且集中吸附在细粒子颗粒物上。
Pollution characteristics of atmospheric particulates in spring Beijing was studied by analyzing the air aerosol sample monitored in the urban Beijing from March 14, 2008 to May 8, 2008. The concentration of total suspended particulates （TSP） and inhalable particulates were analyzed, and Scanning Electronic Microscopy （SEM） was employed to character the micro-morphology of the TSP and PM10. The results showed that PMlo accounted for more than 65% of TSP, and PM2.5 and PM1.0contributed 84.2% and 67.4% of total PM10. The SEM images showed that the atmospheric particulates were existed in regular shape and irregular shape. Many farina particles were also found in samples. Some heavy metals were detected in the atmospheric particulates by EDX, the concentration of Pb was higher and easily adsorbed on fine particles.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2009年第7期44-47,51,共5页
Environmental Pollution & Control
基金
2007年北京市教委"人才强教计划"
