Water-soluble ions in atmospheric aerosols measured in Xi'an, China: Seasonal variations and sources | |
Zhang, T (Zhang, T.)[1]; Cao, JJ (Cao, J. J.)[1,2]; Tie, XX (Tie, X. X.)[1,3]; Shen, ZX (Shen, Z. X.)[2]; Liu, SX (Liu, S. X.)[1]; Ding, H (Ding, H.)[4]; Han, YM (Han, Y. M.)[1]; Wang, GH (Wang, G. H.)[1]; Ho, KF (Ho, K. F.)[1]; Qiang, J (Qiang, J.)[4]; Li, WT (Li, W. T.)[5] | |
2011-10-30 | |
发表期刊 | ATMOSPHERIC RESEARCH |
卷号 | 102期号:1-2页码:110-119 |
文章类型 | 期刊论文 |
摘要 | Daily PM(2.5) and water-soluble inorganic ions (Na(+), NH(4)(+), K(+), Mg(2+), Ca(2+), Cl(-), NO(3)(-) and SO(4)(2-)) were collected in Xi'an (34.23 degrees N, 108.88 degrees E), China from March 2006 to March 2007. PM(2.5) was collected using battery-powered mini-volume samplers. And the ions were determined by ion chromatography from the measured aerosol mass. The annual average mass concentration of PM(2.5) was found to be 194.1 +/- 78.6 mu g m(-3), which exceeded substantially the international guidelines for health concerns. The seasonal average mass concentration of PM(2.5) was highest in winter (266.8 mu g m(-3)) and lowest in summer (138.6 mu g m(-3)). The three highest abundant ions were SO(4)(2-), NO(3)(-), and NH(4)(-), with average concentrations of 35.6 +/- 19.5 mu g m(-3), 16.4 +/- 10.1 mu g m(-3), and 11.4 6.8 mu g m(-3), which were accounted for 18.7%, 8.0%, and 5.7% of the PM(2.5) mass, respectively. The major ions were in the species of (NH(4))(2)SO(4), NH(4)HSO(4) and NH(4)NO(3), and their concentrations were highest in winter, due to high coal combustion. The concentrations of Ca(2+) were higher in spring than other seasons, due to the higher mineral dust concentrations. Ca(2+) was strongly correlated with CO(3)(2-), which was calculated as the difference in the measured cations minus anions. Ion balance calculations indicate that the PM(2.5) was acidic, and this result is consistent with the measurement of pH values. Sulfur oxidation ratio was higher in summer and autumn, which implies that the formation of secondary sulfate-rich particles is favored by warm and relatively moist weather. Nitrogen oxidation ratio was highest in autumn. |
关键词 | Aerosols Water-soluble ions Seasonal variation Source Xi'an |
DOI | 10.1016/j.atmosres.2011.06.014 |
收录类别 | SCI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/10278 |
专题 | 粉尘与环境研究室 |
通讯作者 | Cao, JJ (Cao, J. J.)[1,2] |
作者单位 | 1.SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; 2.Xi'an Jiaotong University, Xi'an, China; 3.National Center for Atmospheric Research, Boulder, CO, USA; 4.Chang'an University, Xi'an, China; 5.Xi'an Environmental Monitoring Station, Xi'an, China |
推荐引用方式 GB/T 7714 | Zhang, T ,Cao, JJ ,Tie, XX ,et al. Water-soluble ions in atmospheric aerosols measured in Xi'an, China: Seasonal variations and sources[J]. ATMOSPHERIC RESEARCH,2011,102(1-2):110-119. |
APA | Zhang, T .,Cao, JJ .,Tie, XX .,Shen, ZX .,Liu, SX .,...&Li, WT .(2011).Water-soluble ions in atmospheric aerosols measured in Xi'an, China: Seasonal variations and sources.ATMOSPHERIC RESEARCH,102(1-2),110-119. |
MLA | Zhang, T ,et al."Water-soluble ions in atmospheric aerosols measured in Xi'an, China: Seasonal variations and sources".ATMOSPHERIC RESEARCH 102.1-2(2011):110-119. |
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