摘要
在兰州市5个监测点采集了2013年各季节典型月大气PM_(2.5)样品,对PM_(2.5)的质量浓度、无机水溶性离子及无机元素进行了测定。结果显示:兰州市PM_(2.5)平均质量浓度是标准限值1.8倍。其中无机水溶性离子SO_4^(2-)、NO_3^-、Cl^-、Ca^(2+)、Na^+、NH_4^+、K^+和无机元素B、V、Mn、Fe、Cu、Pb、As随季节的变化明显。利用正交矩阵因子分析法(PMF)对兰州市PM_(2.5)的来源进行解析,结果表明兰州市PM_(2.5)各来源因子中人为因素造成的来源因子分担率整体上高于自然因素,影响PM_(2.5)来源的主要是人为因素。
Atmospheric PM2.5 samples were collected in 2013 during a typical month of each season at the five monitoring stations of Lanzhou. The mass concentration, water - soluble inorganic ion and inorganic elements of PM2.5 were determined. The results showed that the average PM2.5 mass concentration was 1.8 times of the annu- M PM2.5 of National Quality Standard of China. The water - soluble inorganic ion SO4^2- , NO3^- , Cl^- , Ca^2＋ , Na^＋ , NHf, K^＋ and the inorganic element B, V, Mn, Fe, Cu, Pb and As changed with th Matrix Factorization （PMF） model was performed to identify the sources of PM2.5 in Lanzhou. that the sources and contributions of PM2.5 in Lanzhou was different, the impact of human fact natural factors. e seasons. Positive The results showed ors was higher than natural factors.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2017年第8期101-107,共7页
Journal of Arid Land Resources and Environment
基金
兰州大学中央高校基本科研业务费专项资金(lzujbky-2016-261
lzujbky-2016-262)资助
关键词
PM2.5
无机水溶性离子
无机元素
源解析
PM2.5
water - soluble inorganic ion
inorganic element
source apportionment
