摘要
为了解兰州市大气PM2.5中金属元素的污染水平和分布,于2013年冬季和春季在兰州市区4个在线监测点进行PM2.5样品采集,利用ICP-MS分析金属元素浓度。结果表明,Pb、B元素含量高于200 ng/m3,V、Fe元素含量在100~200 ng/m3,其余元素含量低于100 ng/m3,其中Pb含量最高,平均含量达到373.8 ng/m3.各监测点元素含量在冬季和春季各有不同,整体上是冬季高于春季。金属元素在兰州市区的空间分布与兰州市工业排放和气象因素有关,工业排放为主导因素。
To understand concentration levels and distributing characteristics of metal elements in fine particles of Lanzhou, samples of pine particles were collected at 4 online monitoring points,and elements of the samples were determined by ICP-MS. The results showed that concentration of Pb, B were above 200ng/m3, V, Fe were from 100 ng/m3 to 200ng/m3, the remaining elements were below 100ng/m3. Pb possesses the highest detectable amount, the mean concentration is 373.8ng/m3. Each element has the different concentration level in winter and spring, and the concentration level is winter higher than spring as a whole. The distributing characteristics of Lanzhou are related to industrial emission （the dominant factor） and meteorological factors.
出处
《中国环境监测》
CAS
CSCD
北大核心
2015年第5期67-72,共6页
Environmental Monitoring in China
关键词
PM2.5
金属元素
浓度
分布
兰州
PM2.5
metal elements
concentration
distribution
Lanzhou
