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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, Meng1; Liu, Weiguo1,2
2016
Source PublicationENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume23Issue:1Pages:388-401
SubtypeArticle
AbstractNitrogen 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.
KeywordNitrate Dual Isotopes Land Use Catchments Loess Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s11356-015-5268-y
WOS KeywordYELLOW-RIVER BASIN ; NITRATE SOURCES ; HILLY AREA ; SOIL-EROSION ; OXYGEN ; CONSERVATION ; DENITRIFICATION ; FRACTIONATION ; GROUNDWATER ; CHANGJIANG
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000368199300036
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5851
Collection加速器质谱中心
Affiliation1.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
Recommended Citation
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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