Using a nitrogen and oxygen isotopic approach to identify nitrate sources and cycling in the Wei River of northwestern China
文献类型：期刊论文
| 作者 | Hu, Jing2,4; Liu, Weiguo2,3; Xing, Meng2 ; Li, Yuliang1
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| 刊名 | HUMAN AND ECOLOGICAL RISK ASSESSMENT
 |
| 出版日期 | 2019-04-03 |
| 卷号 | 25期号:3页码:755-771 |
| 关键词 | nitrogen isotopes oxygen isotopes nitrate tracing nitrogen sources Wei River |
| ISSN号 | 1080-7039 |
| DOI | 10.1080/10807039.2018.1451744 |
| 通讯作者 | Liu, Weiguo(liuwg@loess.llqg.ac.cn) |
| 英文摘要 | The Wei River is the largest tributary of the Yellow River in China. To understand the sources and cycling of nitrate in the Wei River, we determined the concentrations and nitrogen and oxygen isotopic values of nitrate from water samples. Our results revealed that NO3--N dominated the inorganic N and ranged from 0.1 to 8.8 mg/L (averaging 3.3 mg/L). Although this NO3--N concentration does not exceed the World Health Organization's drinking water standard of 10 mg/L, the NO3--N content of most water samples exceeded 3 mg/L, indicating poor water quality. The NO3--N concentrations and delta N-15-NO3- values demonstrate that there are significant differences in the spatial distribution of nitrogen between the tributaries and the main stream of the Wei River. In addition, a negative linear relationship (r(2) = 0.63) between NO3--N concentrations and delta O-18-NO3- values suggests mixing between two distinct sources (fertilizer and manure or sewage). Furthermore, we infer that the main source of nitrate is not manure or sewage itself, but rather the nitrification of NH4+ in manure and sewage. Finally, no obvious denitrification processes were observed. These results expand our understanding of sewage as a major source of nitrate to the Wei River, emphasizing the role of nitrification. |
| WOS关键词 | LOESS PLATEAU ; GROUND-WATER ; DUAL-ISOTOPE ; LAND USES ; TRANSFORMATIONS ; DELTA-O-18 ; SYSTEM ; SOIL ; NITRIFICATION ; FRACTIONATION |
| 资助项目 | National Natural Science Foundation of China[41373022] ; National Natural Science Foundation of China[41303011] ; Fundamental Research Funds for the Central Universities[310829161112] ; Chinese Academy of Sciences Light of West China Program |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000472106200016 |
| 出版者 | TAYLOR & FRANCIS INC |
| 资助机构 | National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Chinese Academy of Sciences Light of West China Program |
| 源URL | [http://ir.ieecas.cn/handle/361006/13821]  |
| 专题 | 地球环境研究所_加速器质谱中心 |
| 通讯作者 | Liu, Weiguo |
| 作者单位 | 1.Changan Univ, Coll Environm Sci & Engn, Xian, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China 3.Xi An Jiao Tong Univ, Sch Human Settlement & Civil Engn, Xian, Shaanxi, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Jing,Liu, Weiguo,Xing, Meng,et al. Using a nitrogen and oxygen isotopic approach to identify nitrate sources and cycling in the Wei River of northwestern China[J]. HUMAN AND ECOLOGICAL RISK ASSESSMENT,2019,25(3):755-771. |
| APA | Hu, Jing,Liu, Weiguo,Xing, Meng,&Li, Yuliang.(2019).Using a nitrogen and oxygen isotopic approach to identify nitrate sources and cycling in the Wei River of northwestern China.HUMAN AND ECOLOGICAL RISK ASSESSMENT,25(3),755-771. |
| MLA | Hu, Jing,et al."Using a nitrogen and oxygen isotopic approach to identify nitrate sources and cycling in the Wei River of northwestern China".HUMAN AND ECOLOGICAL RISK ASSESSMENT 25.3(2019):755-771. |
入库方式： OAI收割
来源：地球环境研究所
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