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DOI	10.1007/s12665-017-6712-8
	Impact of anthropogenic and natural processes on the chemical compositions of precipitation at a rapidly urbanized city in Northwest China
	Li, Jianguo; Li, Zongxing; Feng, Qi
发表日期	2017
ISSN	1866-6280
EISSN	1866-6299
卷号	76 期号:10
英文摘要	In this study, the chemical composition of precipitation was applied as an indicator to study the influence of urbanization on the atmosphere in Qilian County, a northwest city in China. The results showed that the annual mean pH calculated from the concentration of H+ was 7.35 due to alkaline ion neutralization, and Ca2+ had the largest contribution. Ca2+ and SO42- were the most abundant ions, accounting for 45 and 17%, respectively, of the total ion mass. The correlation coefficient between SO42- and NO3- reaching 0.85 in the urban area indicated the same source. The highest concentration of sulfate in spring was probably related to the strong wind in Northwest China, while the concentration of nitrate was the highest in winter suggesting that most of the nitrate originated from coal combustion, not vehicle emission. The application of factor and cluster analysis indicated that 38.43% of the SO42- and 16.97% of the NO3 - in Qilian County were from crustal sources, while 61.5% of the SO42- and 83.03% of the NO3- originated from the human activities. The back trajectory analysis indicated that the pollution emitted from the surrounding areas also made a great contribution to the local atmospheric quality. Thus the communication and cooperation mechanisms with surrounding cities and improvement of energy consumption efficiency should be strengthened in the next few years.
关键词	Urbanization Precipitation Chemical components Source assessment
学科领域	Environmental Sciences & Ecology; Geology; Water Resources
语种	英语
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	ENVIRONMENTAL EARTH SCIENCES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111928
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Ecohydrol Inland River Basin, Gansu Hydrol & Water Resources Engn Res Ctr, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Li, Jianguo,Li, Zongxing,Feng, Qi. Impact of anthropogenic and natural processes on the chemical compositions of precipitation at a rapidly urbanized city in Northwest China[J]. 中国科学院西北生态环境资源研究院,2017,76(10).
APA	Li, Jianguo,Li, Zongxing,&Feng, Qi.(2017).Impact of anthropogenic and natural processes on the chemical compositions of precipitation at a rapidly urbanized city in Northwest China.ENVIRONMENTAL EARTH SCIENCES,76(10).
MLA	Li, Jianguo,et al."Impact of anthropogenic and natural processes on the chemical compositions of precipitation at a rapidly urbanized city in Northwest China".ENVIRONMENTAL EARTH SCIENCES 76.10(2017).