IGGCAS OpenIR  > 新生代地质与环境院重点实验室
Backgrounds as a potentially important component of riverine nitrate loads
Li, Siyue1; Jiang, Hao2,3; Xu, Zhifang4; Zhang, Quanfa1,2,3
2022-09-10
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume838Pages:10
AbstractNitrate (NO3-) is a major trigger for river eutrophication. While efforts have been made to understand the anthropogenic NO3- pollution in rivers, the role of background NO3- in determining NO3- loads remains to be studied. In this study, we used dual-isotopes (delta N-15/delta O-18-NO3-) and an isotope-mixing model to reveal the natural and anthropogenic processes regulating the NO3- loads in a forest river that acts as a headwater source for the China's South to North Water Transfer Project. Even though the basin is sparsely populated, the mean NO3--N concentration (0.6 +/- 0.2 mg/L) was much higher than the median concentration of global rivers (0.3 +/- 0.2 mg/L). Meanwhile, the delta N-15-NO(3)(- )was extremely depleted (as low as -14.4 parts per thousand). The correlations between the NO3- concentrations and isotopes indicate that the nitrification of different sources (i.e., soil organic nitrogen, chemical fertilizer, manure, and sewage) dominates the NO3- loads. Soil organic nitrogen accounted for c.a. 60% of the riverine NO3- in the high -flow season, which alone exceeds China's national standard. This finding clearly shows that highNO(3)(-) loads in rivers could not all be ascribed to direct anthropogenic inputs, and background NO3- could be critical triggers. Therefore, when evaluating the NO3- pollution of rivers, the background NO3- concentrations must be considered along with the actual NO3- loads. In the low-flow season, the contribution from manure and sewage (c.a. 34%) increases. This study highlights the potentially important role of background NO3- in regulating riverine NO3- loads, providing important implications for understanding high riverine NO3- loads worldwide.
KeywordNitrate Background Isotope River Nitri fication
DOI10.1016/j.scitotenv.2022.155999
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences
WOS KeywordDUAL-ISOTOPE APPROACH ; LAND-USE ; SOURCE IDENTIFICATION ; UNCERTAINTY ANALYSIS ; NITROGEN DEPOSITION ; WATER-QUALITY ; DENITRIFICATION ; STREAMS ; MODEL ; NITRIFICATION
Language英语
Funding ProjectNational Natural Science Foundation of China[32030069] ; National Natural Science Foundation of China[42003005] ; National Natural Science Foundation of China[31670473] ; Key Program of the Chinese Academy of Sciences[ZDRW-ZS-2016-7-2]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000806111000009
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/106052
Collection新生代地质与环境院重点实验室
Corresponding AuthorJiang, Hao; Zhang, Quanfa
Affiliation1.Wuhan Inst Technol, Inst Changjiang Water Environm & Ecol Secur, Sch Environm Ecol & Biol Engn, Engn Res Ctr Phosphorus Resources Dev,Key Lab Gree, Wuhan 430205, Peoples R China
2.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China
3.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Wuhan 430074, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Li, Siyue,Jiang, Hao,Xu, Zhifang,et al. Backgrounds as a potentially important component of riverine nitrate loads[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,838:10.
APA Li, Siyue,Jiang, Hao,Xu, Zhifang,&Zhang, Quanfa.(2022).Backgrounds as a potentially important component of riverine nitrate loads.SCIENCE OF THE TOTAL ENVIRONMENT,838,10.
MLA Li, Siyue,et al."Backgrounds as a potentially important component of riverine nitrate loads".SCIENCE OF THE TOTAL ENVIRONMENT 838(2022):10.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Siyue]'s Articles
[Jiang, Hao]'s Articles
[Xu, Zhifang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Siyue]'s Articles
[Jiang, Hao]'s Articles
[Xu, Zhifang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Siyue]'s Articles
[Jiang, Hao]'s Articles
[Xu, Zhifang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.