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, Zhifang ; Li, Yushan ; Tang, Yang ; Han, Guilin |
| 刊名 | ATMOSPHERIC RESEARCH
 |
| 出版日期 | 2009-11 |
| 卷号 | 94期号:3页码:481-490 |
| 关键词 | Major ions Strontium isotope Alkaline rain Lanzhou Loess Plateau |
| 中文摘要 | 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记录号 | WOS:000271336300011 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21366]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 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. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。