Non-negligible N2O emission hotspots: Rivers impacted by ion-adsorption rare earth mining
文献类型：期刊论文
| 作者 | Shu, Wang1,2; Zhang, Qiuying3; Audet, Joachim4; Li, Zhao; Leng, Peifang; Qiao, Yunfeng; Tian, Chao; Chen, Gang5; Zhao, Jun6; Cheng, Hefa7 |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2024-03-01 |
| 卷号 | 251页码:121124 |
| 关键词 | Nitrous oxide Pathways Isotope mapping Microbial processes Hotspot Ion -adsorption rare earth mining |
| DOI | 10.1016/j.watres.2024.121124 |
| 产权排序 | 1 |
| 文献子类 | Article ; Early Access |
| 英文摘要 | Rare earth mining causes severe riverine nitrogen pollution, but its effect on nitrous oxide (N2O) emissions and the associated nitrogen transformation processes remain unclear. Here, we characterized N2O fluxes from China's largest ion-adsorption rare earth mining watershed and elucidated the mechanisms that drove N2O production and consumption using advanced isotope mapping and molecular biology techniques. Compared to the undisturbed river, the mining-affected river exhibited higher N2O fluxes (7.96 +/- 10.18 mmol m- 2 d-1 vs. 2.88 +/- 8.27 mmol m- 2 d-1, P = 0.002), confirming that mining-affected rivers are N2O emission hotspots. Flux variations scaled with high nitrogen supply (resulting from mining activities), and were mainly attributed to changes in water chemistry (i.e., pH, and metal concentrations), sediment property (i.e., particle size), and hydrogeomorphic factors (e.g., river order and slope). Coupled nitrification-denitrification and N2O reduction were the dominant processes controlling the N2O dynamics. Of these, the contribution of incomplete denitrification to N2O production was greater than that of nitrification, especially in the heavily mining-affected reaches. Co-occurrence network analysis identified Thiomonas and Rhodanobacter as the key genus closely associated with N2O production, suggesting their potential roles for denitrification. This is the first study to elucidate N2O emission and influential mechanisms in mining-affected rivers using combined isotopic and molecular techniques. The discovery of this study enhances our understanding of the distinctive processes driving N2O production and consumption in highly anthropogenically disturbed aquatic systems, and also provides the foundation for accurate assessment of N2O emissions from mining-affected rivers on regional and global scales. |
| WOS关键词 | NITROGEN ISOTOPIC ANALYSIS ; OXIDE N2O ; WATER ; DENITRIFICATION ; PATHWAYS ; STREAMS ; FLUXES ; OXYGEN ; SCALE ; ORE |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/202753]  |
| 专题 | 禹城站农业生态系统研究中心_外文论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Shandong Yucheng Agroecosystem Natl Observat & Res, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 101408, Peoples R China 3.Sino Danish Ctr Educ & Res, Beijing 101408, Peoples R China 4.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China 5.Aarhus Univ, Dept Ecosci, CF Mollers, DK-8000 Aarhus, Denmark 6.Florida State Univ FSU, Florida A&M Univ FAMU, Joint Coll Engn, Dept Civil & Environm Engn, Tallahassee, FL 32310 USA 7.Nanjing Univ, Sch Geog & Ocean Sci, Nanjing 210023, Peoples R China 8.Peking Univ, Coll Urban & Environm Sci, MOE Lab Earth Surface Proc, Beijing 100871, Peoples R China 9.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shu, Wang,Zhang, Qiuying,Audet, Joachim,et al. Non-negligible N2O emission hotspots: Rivers impacted by ion-adsorption rare earth mining[J]. WATER RESEARCH,2024,251:121124. |
| APA | Shu, Wang.,Zhang, Qiuying.,Audet, Joachim.,Li, Zhao.,Leng, Peifang.,...&Li, Fadong.(2024).Non-negligible N2O emission hotspots: Rivers impacted by ion-adsorption rare earth mining.WATER RESEARCH,251,121124. |
| MLA | Shu, Wang,et al."Non-negligible N2O emission hotspots: Rivers impacted by ion-adsorption rare earth mining".WATER RESEARCH 251(2024):121124. |
入库方式： OAI收割
来源：地理科学与资源研究所
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