Using dual isotopes to identify sources and transformations of nitrogen in water catchments with different land uses, Loess Plateau of China

doi:10.1007/s11356-015-5268-y

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	Using dual isotopes to identify sources and transformations of nitrogen in water catchments with different land uses, Loess Plateau of China
	Xing, Meng 1; Liu, Weiguo 1,2
	2016
发表期刊	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷号	23 期号:1 页码:388-401
文章类型	Article
摘要	Nitrogen pollution in rivers is a research hotspot in the field of biogeochemistry. However, the types and sources of pollution have historically been poorly understood in the water catchments of the Loess Plateau in China. In this study, we have chosen the main waterway and four lesser branches of the Jinghe River that vary by land use. We investigated the concentrations and isotopic signatures of nitrogen in river water. Our results revealed that nitrate was the dominant nitrogen type in river catchments of the Loess Plateau. The delta N-15 and delta O-18 values showed that NO3- ions in the studied river samples were derived from precipitation, manure, sewage, soil organic nitrogen, and synthetic NO3- fertilizer. The delta O-18-NO3- values during July 2012 (mean +/- SD=+18.1 +/- 1.5%) were higher than those during the September 2013 (mean +/- SD=+7.8 +/- 3.7%), which indicated that mixing with atmospheric NO3- resulted in the high delta O-18 values during July 2012. It appears that no intense nitrification and denitrification occurred in all five rivers according to the isotopic and chemical data. A Bayesian model was used to determine the contributions of four NO3- sources to all five rivers. Results showed that source contributions differ significantly between July and September, and the four potential NO3- sources also showed high variability between the different land use areas.
关键词	Nitrate Dual Isotopes Land Use Catchments Loess Plateau
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
DOI	10.1007/s11356-015-5268-y
关键词[WOS]	YELLOW-RIVER BASIN ; NITRATE SOURCES ; HILLY AREA ; SOIL-EROSION ; OXYGEN ; CONSERVATION ; DENITRIFICATION ; FRACTIONATION ; GROUNDWATER ; CHANGJIANG
收录类别	SCI
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000368199300036
引用统计	被引频次：53[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/5851
专题	加速器质谱中心
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 2.Xi An Jiao Tong Univ, Sch Human Settlement & Civil Engn, Xian 710049, Peoples R China
推荐引用方式 GB/T 7714	Xing, Meng,Liu, Weiguo. Using dual isotopes to identify sources and transformations of nitrogen in water catchments with different land uses, Loess Plateau of China[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2016,23(1):388-401.
APA	Xing, Meng,&Liu, Weiguo.(2016).Using dual isotopes to identify sources and transformations of nitrogen in water catchments with different land uses, Loess Plateau of China.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,23(1),388-401.
MLA	Xing, Meng,et al."Using dual isotopes to identify sources and transformations of nitrogen in water catchments with different land uses, Loess Plateau of China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 23.1(2016):388-401.

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