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Baseflow and Coupled Nitrification-Denitrification Processes Jointly Dominate Nitrate Dynamics in a Watershed Impacted by Rare Earth Mining

文献类型：期刊论文

作者Shu, Wang2,6,7,8,9; Zhang, Qiuying6; Audet, Joachim1; Hein, Thomas2; Leng, Peifang7; Hu, Mei2; Li, Zhao7; Cheng, Hefa4; Chen, Gang5; Li, Fadong7,8
刊名ENVIRONMENTAL SCIENCE & TECHNOLOGY
出版日期2024-12-16
卷号N/A
关键词nitrate dynamic legacy effect multiple isotopes baseflow coupled nitrification-denitrification processes ion-adsorption rare earth mine
DOI10.1021/acs.est.4c05909
产权排序2
文献子类Article ; Early Access
英文摘要Mining activities cause severe nitrogen pollution in watersheds, yet our understanding of the transport pathways, transformation processes, and control mechanisms of nitrate (NO3 -) in these areas is limited. Based on nearly 4-year observations of groundwater and river in China's largest ion-adsorption rare earth mining watershed, we revealed the dynamics of NO3 - and its drivers using stoichiometry-based load model, molecular biological, and multi-isotope approaches. Results indicated that the NO3 - dynamics were jointly controlled by sources (precipitation, terrestrial inputs, and sediment supply) and processes (hydrological and biological). The monthly NO3 - export load from the 444.4 km2 watershed was 3.72 x 105 kg. Groundwater (36 +/- 26%) and soil nitrogen (25 +/- 17%) were the primary exogenous sources of NO3 -. Baseflow was the main hydrological pathway for legacy nitrogen into the river, contributing 66.8% of the NO3 - load. Coupled nitrification-denitrification were key biological processes affecting the NO3 - transformation, with denitrification contributing 58%. Burkholderia were most associated with NO3 - transformation. Dissolved organic carbon and oxygen were major drivers affecting the NO3 - production and consumption. This study highlights effective control and management strategies for nitrogen pollution in mining-affected watersheds, considering not only reducing nitrogen inputs but also integrating hydrological pathways and nitrogen transformation mechanisms.
WOS关键词NITROGEN ISOTOPIC ANALYSIS ; GROUNDWATER ; POLLUTION ; PATHWAYS ; AMMONIUM ; SYSTEMS ; STREAMS ; RIVER ; OXIDE
WOS研究方向Engineering ; Environmental Sciences & Ecology
WOS记录号WOS:001378688600001
源URL[http://ir.igsnrr.ac.cn/handle/311030/210425]  
专题禹城站农业生态系统研究中心_外文论文
通讯作者Zhang, Qiuying; Li, Fadong
作者单位1.Aarhus Univ, Dept Ecosci, DK-8000 Aarhus, Denmark
2.BOKU Univ, Inst Hydrobiol & Aquat Ecosyst Management, A-1180 Vienna, Austria
3.Jiangxi Prov Ecol Environm Monitoring Ctr, Nanchang 330039, Peoples R China
4.Peking Univ, Coll Urban & Environm Sci, MOE Lab Earth Surface Proc, Beijing 100871, Peoples R China
5.Florida A&M Univ FAMU, Florida State Univ FSU Joint Coll Engn, Dept Civil & Environm Engn, Tallahassee, FL 32310 USA
6.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China
7.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Shandong Yucheng Agroecosystem Natl Observat & Res, Beijing 100101, Peoples R China
8.Sino Danish Coll Univ, Chinese Acad Sci, Beijing 101408, Peoples R China
9.Sino Danish Ctr Educ & Res, Beijing 101408, Peoples R China
推荐引用方式
GB/T 7714		 Shu, Wang,Zhang, Qiuying,Audet, Joachim,et al. Baseflow and Coupled Nitrification-Denitrification Processes Jointly Dominate Nitrate Dynamics in a Watershed Impacted by Rare Earth Mining[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2024,N/A.
APA Shu, Wang.,Zhang, Qiuying.,Audet, Joachim.,Hein, Thomas.,Leng, Peifang.,...&Wu, Fengchang.(2024).Baseflow and Coupled Nitrification-Denitrification Processes Jointly Dominate Nitrate Dynamics in a Watershed Impacted by Rare Earth Mining.ENVIRONMENTAL SCIENCE & TECHNOLOGY,N/A.
MLA Shu, Wang,et al."Baseflow and Coupled Nitrification-Denitrification Processes Jointly Dominate Nitrate Dynamics in a Watershed Impacted by Rare Earth Mining".ENVIRONMENTAL SCIENCE & TECHNOLOGY N/A(2024).

入库方式： OAI收割

来源：地理科学与资源研究所

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