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Stable isotope analyses of precipitation nitrogen sources in Guiyang, southwestern China
Xue-Yan Liu;  Hong-Wei Xiao;  Hua-Yun Xiao;  Wei Song;  Keisuke Koba
2017
Source PublicationEnvironmental Pollution
Volume230Pages:486-494
Abstract

To constrain sources of anthropogenic nitrogen (N) deposition is critical for effective reduction of reactive N emissions and better evaluation of N deposition effects. This study measured delta N-15 signatures of nitrate (NO3-), ammonium (Nflt) and total dissolved N (TDN) in precipitation at Guiyang, southwestern China and estimated contributions of dominant N sources using a Bayesian isotope mixing model. For NOT, the contribution of non-fossil N oxides (NOx, mainly from biomass burning (24 +/- 12%) and microbial N cycle (26 5%)) equals that of fossil NOx, to which vehicle exhausts (31 +/- 19%) contributed more than coal combustion (19 9%). For NO3-, ammonia (NH3) from volatilization sources (mainly animal wastes (22 12%) and fertilizers (22 +/- 10%)) contributed less than NH3 from combustion sources (mainly biomass burning (17 +/- 8%), vehicle exhausts (19 +/- 11%) and coal combustions (19 +/- 12%)). Dissolved organic N (DON) accounted for 41% in precipitation TDN deposition during the study period. Precipitation DON had higher 8.15N values in cooler months (13.1 parts per thousand) than in warmer months (-7.0 parts per thousand), indicating the dominance of primary and secondary ON sources, respectively. These results newly underscored the importance of non-fossil NOx, fossil NH3 and organic N in precipitation N inputs of urban environments. (C) 2017 Elsevier Ltd. All rights reserved.

KeywordStable Isotope Ammonium Nitrate Dissolved Organic Nitrogen Siar Reactive Nitrogen Emission
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/7722
Collection环境地球化学国家重点实验室
Affiliation1.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
2.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Guizhou, Peoples R China
3.Tokyo Univ Agr & Technol, Inst Agr, Tokyo 1838509, Japan
4.East China Univ Technol, Atmospher Environm Lab, Key Lab Nucl Resources & Environm, Minist Educ, Nanchang 330013, Jiangxi, Peoples R China
5.East China Univ Technol, Sch Water Resources & Environm Engn, Nanchang 330013, Jiangxi, Peoples R Chin
6.Kyoto Univ, Ctr Ecol Res, Otsu, Shiga 5202113, Japan
Recommended Citation
GB/T 7714
Xue-Yan Liu;Hong-Wei Xiao;Hua-Yun Xiao;Wei Song;Keisuke Koba. Stable isotope analyses of precipitation nitrogen sources in Guiyang, southwestern China[J]. Environmental Pollution,2017,230:486-494.
APA Xue-Yan Liu;Hong-Wei Xiao;Hua-Yun Xiao;Wei Song;Keisuke Koba.(2017).Stable isotope analyses of precipitation nitrogen sources in Guiyang, southwestern China.Environmental Pollution,230,486-494.
MLA Xue-Yan Liu;Hong-Wei Xiao;Hua-Yun Xiao;Wei Song;Keisuke Koba."Stable isotope analyses of precipitation nitrogen sources in Guiyang, southwestern China".Environmental Pollution 230(2017):486-494.
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