YAN Yulong1,2, GUO Lili1, ZHANG Guixiang1, HE Qiusheng1,*, WANG Xinming3
(1.College of Environment and Safety, Taiyuan University of Science and Technology, Taiyuan 030024, China;
2. College of Environmental Sciences and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
3. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China)
Abstract: PM2.5 samples were collected in Taiyuan City, China from summer 2009 to spring 2010, and lead (Pb) and its isotopic abundance were detected using ICP-MS. Levels and seasonal variation characteristics of lead were reported, and the characteristics of lead isotope abundance and its sources were discussed by enrichment factor method. Results show that the average concentration of Pb in PM2.5 in Taiyuan is270.83ng/m3 during the sampling time, lower than that in the ambient air quality standards of China (GB3095-2012), but still at the medium pollution level in most cities in China. The concentration of Pb in PM2.5 in winter isthe highest the whole year due to the excessive coal combustion for heating. In spring, Pb from dust might be the main source for the Pb enrichmentin PM2.5. Pb and PM2.5 have the same main source of coal emission both in summer and winter by the correlation relationship. The isotopic abundance ratios of 206Pb/207Pb and 208Pb/206Pb show that the main source of Pb in PM2.5is coal emissions, especially in winter. Enrichment factor ofPbin winter is 20.45 for the whole samples, and is mainly related to human activities. In spring, the enrichment factor is 10.76 and means the more contribution of natural enrichment.
Keyword: PM2.5; Lead; isotopic abundance ratio; enrichment factor; source
EARTH AND ENVIRONMENT Vol. 43, No.3, Tot No.305, 2015, Page 279-284
