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Chemical composition and sources of PM2.5 and TSP collected at Qinghai Lake during summertime
Zhang, NN (Zhang, Ningning)[ 1 ]; Cao, JJ (Cao, Junji)[ 1,2 ]; Liu, SX (Liu, Suixin)[ 1 ]; Zhao, ZZ (Zhao, ZhuZi)[ 1 ]; Xu, HM (Xu, Hongmei)[ 1 ]; Xiao, S (Xiao, Shun)[ 1,3,4 ]
2014-03-01
Source PublicationATMOSPHERIC RESEARCH
Volume138Pages:213-222
Subtype期刊论文
Abstract

PM2.5 and total suspended particulate (TSP) samples were collected from June to September 2010 at Qinghai Lake, northeastern Tibetan Plateau. The concentrations of major water-soluble ions, 10 elements, elemental carbons (ECs) and organic carbons (OCs) were quantified. Mass concentrations of PM2.5 and TSP were 21.27±10.70μgm-3 and 41.47±20.25μgm-3, respectively, and the mean ratio of PM2.5/TSP was 0.51. The greatest anion and cation in both PM2.5 and TSP samples were SO42- and Ca2+, respectively. Crustal elements, such as Ca, Fe and K, were the main elements in our aerosol samples, and their enrichment factors (EFs) were lower than 10. EFs for Pb, As, and Zn were greater than 10, indicating that they were influenced by anthropogenic sources. EC concentrations were 0.33±0.17μgm-3 and 0.47±0.28μgm-3, whereas OC concentrations were 1.49±0.63μgm-3 and 2.30±0.95μgm-3 in PM2.5 and TSP, respectively. Based on the calculated ratios of EC/TC and K+/EC, most of the ECs were found to be related to biomass burning emissions. Because of the pollution from local sources, the ratios of OC/EC were 4.77±1.32 and 5.23±1.39 in PM2.5 and TSP, respectively, which were lower than those of other remote sites. Salt particles produced by the salty lake reacted with acid gases and caused most of the nitrates and a small fraction of sulfate to be distributed in coarse mode; Cl deficit was also observed in our aerosol samples. Results of backward trajectories and correlation analysis show that the concentrations of SO42-, OCs, As, Pb, and Zn, were influenced by the long-distance transport from eastern China.

KeywordAerosol Elemental Enrichment Carbonaceous Components Transport Remoter Atmosphere
DOI10.1016/j.atmosres.2013.11.016
Indexed BySCI ; EI
Language英语
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9848
Collection粉尘与环境研究室
Corresponding AuthorZhang, NN (Zhang, Ningning)[ 1 ]
Affiliation1.Key Laboratory of Aerosol, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China;
2.Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, China;
3.Climate Center of Shaanxi Meteorological Bureau, Xi'an, China;
4.Meteorological Bureau of Baoji Municipality, Baoji, China
Recommended Citation
GB/T 7714
Zhang, NN ,Cao, JJ ,Liu, SX ,et al. Chemical composition and sources of PM2.5 and TSP collected at Qinghai Lake during summertime[J]. ATMOSPHERIC RESEARCH,2014,138:213-222.
APA Zhang, NN ,Cao, JJ ,Liu, SX ,Zhao, ZZ ,Xu, HM ,&Xiao, S .(2014).Chemical composition and sources of PM2.5 and TSP collected at Qinghai Lake during summertime.ATMOSPHERIC RESEARCH,138,213-222.
MLA Zhang, NN ,et al."Chemical composition and sources of PM2.5 and TSP collected at Qinghai Lake during summertime".ATMOSPHERIC RESEARCH 138(2014):213-222.
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