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Chemical and strontium isotope characterization of rainwater at an urban site in Loess Plateau, Northwest China

文献类型：期刊论文

作者Xu, Zhifang1; Li, Yushan2,3; Tang, Yang2,4; Han, Guilin4
刊名ATMOSPHERIC RESEARCH
出版日期2009-11-01
卷号94期号:3页码:481-490
关键词Major ions Strontium isotope Alkaline rain Lanzhou Loess Plateau
ISSN号0169-8095
DOI10.1016/j.atmosres.2009.07.005
文献子类Article
英文摘要Major ion concentrations and strontium isotopic ratios ((87)Sr/(86)Sr) were measured in rainwater samples collected at the urban site of Lanzhou, a city located on the Loess Plateau in the and and semiarid areas of northwest China. The rainwater samples possessed alkaline pH, at a reference level of 5.6, with a range of 6.82 to 8.28 and a volume-weighted mean (VWM) pH value of 7.70. The alkaline character of rainwater in Lanzhou is due to the result of neutralization caused by the alkaline soil dusts which contain large amount of CaCO(3). It was observed that Ca(2+) was the most abundant cation with a VWM value of 886 mu eq l(-1) (115-2184 mu eq l(-1)), accounting for 87.8% of the total cations. Without considering HCO(3)(-), SO(4)(2-) and NO(3)(-) were dominant among the anions, accounting for 64.2% and 23.0%, respectively, of the total measured anions. Using Na as an indicator of marine origin and Al for terrestrial inputs, the proportions of sea salt and non-sea-salt elements were estimated from elemental ratios. The precipitation in this region has typical continental characteristics. The Sr concentrations varied from 0.004 to 0.885 mu mol l(-1), and strontium isotopic ratios ((87)Sr/(86)Sr) lay in the range of 0.71025-0.71302, with an average of 0.71143. The (87)Sr/(86)Sr ratios of Lanzhou rainwater are higher than that of seawater, which reflects contributions from the radiogenic Sr sources of the aerosols. The most suitable candidate for the source would be the soil dust originating from local and distant loess and desert areas. The (87)Sr/(86)Sr ratios were used to characterize different sources of base cations in rainwater, suggesting that the samples could be interpreted in terms of combinations of at least three components: soil dust derived from the Loess Plateau and desert areas in northwest China (with (87)Sr/(86)Sr similar to 0.7130), seawater (with (87)5r/(86)Sr similar to 0.70917), and anthropogenic inputs (With (87)Sr/(86)Sr similar to 0.7103). The high (87)Sr/(86)Sr ratio and Ca and Sr content in the rainwater from Lanzhou can be attributed to the dissolution of calcium carbonate in soil dust. (C) 2009 Elsevier B.V. All rights reserved.
WOS关键词MASSIF-CENTRAL FRANCE ; PRECIPITATION CHEMISTRY ; ACID-RAIN ; IONIC COMPOSITION ; HYDROGEOCHEMICAL IMPLICATIONS ; SEMIARID REGION ; TIBETAN PLATEAU ; WET DEPOSITION ; NORTHERN CHINA ; ATLANTIC OCEAN
WOS研究方向Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000271336300011
出版者ELSEVIER SCIENCE INC
资助机构Chinese Academy of Sciences(KZCX2-YW-205) ; Chinese Academy of Sciences(KZCX2-YW-205) ; Chinese National Natural Science Foundation(40503017 ; Chinese National Natural Science Foundation(40503017 ; 0773077) ; 0773077) ; Chinese Academy of Sciences(KZCX2-YW-205) ; Chinese Academy of Sciences(KZCX2-YW-205) ; Chinese National Natural Science Foundation(40503017 ; Chinese National Natural Science Foundation(40503017 ; 0773077) ; 0773077) ; Chinese Academy of Sciences(KZCX2-YW-205) ; Chinese Academy of Sciences(KZCX2-YW-205) ; Chinese National Natural Science Foundation(40503017 ; Chinese National Natural Science Foundation(40503017 ; 0773077) ; 0773077) ; Chinese Academy of Sciences(KZCX2-YW-205) ; Chinese Academy of Sciences(KZCX2-YW-205) ; Chinese National Natural Science Foundation(40503017 ; Chinese National Natural Science Foundation(40503017 ; 0773077) ; 0773077)
源URL[http://ir.iggcas.ac.cn/handle/132A11/71158]  
专题中国科学院地质与地球物理研究所
通讯作者Xu, Zhifang
作者单位1.Chinese Acad Sci, Key Lab Engn Geomech, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China
4.Chinese Acad Sci, State Key Lab Environm Geochem, Inst Geochem, Guiyang 550002, Guizhou, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Zhifang,Li, Yushan,Tang, Yang,et al. Chemical and strontium isotope characterization of rainwater at an urban site in Loess Plateau, Northwest China[J]. ATMOSPHERIC RESEARCH,2009,94(3):481-490.
APA Xu, Zhifang,Li, Yushan,Tang, Yang,&Han, Guilin.(2009).Chemical and strontium isotope characterization of rainwater at an urban site in Loess Plateau, Northwest China.ATMOSPHERIC RESEARCH,94(3),481-490.
MLA Xu, Zhifang,et al."Chemical and strontium isotope characterization of rainwater at an urban site in Loess Plateau, Northwest China".ATMOSPHERIC RESEARCH 94.3(2009):481-490.

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来源：地质与地球物理研究所

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