Estimating NOx removal capacity of urban trees using stable isotope method: A case study of Beijing, China
文献类型：期刊论文
| 作者 | Gong, Cheng; Xian, Chaofan; Cui, Bowen ; He, Guojin; Wei, Mingyue; Zhang, Zhaoming; Ouyang, Zhiyun
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| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2021-10-01 |
| 卷号 | 224页码:- |
| 关键词 | Mercury Elevated carbon dioxide Rice tissues Field open top chambers (OTCs) Stable isotopic Hg soil amendment |
| ISSN号 | 0147-6513 |
| 英文摘要 | New observations and updated models now suggest terrestrial ecosystems are net sink of atmospheric mercury (Hg), and the critical constrained process to identify the strengths of terrestrial sink is whether the large amount of Hg stored in vegetation originates from the soil as well as from the atmosphere. In this study, field open top chambers (OTCs) experiments reveal that rice plant can assimilate gaseous elemental mercury (GEM, Hg-0) from the atmosphere through stomata, and Hg concentrations in rice leaves, upper and bottom stalks and grains increased with Hg-0 levels in air, showing significantly quadratic linear relationships. Coupling field stable isotope soil amendment experiments, atmospheric source of Hg in rice plant is quantified with more than 90% of Hg accumulation in rice aboveground biomass from air and approximately 80% of rice root Hg from soil. Furthermore, elevated atmospheric carbon dioxide (CO2) exposure led to lower Hg concentration in rice tissues through reduction stomatal conductance of rice leaf, and subsequently impact the capacity of Hg storage in rice aboveground parts from the atmosphere. The findings from experiments provide a foundation for future quantification of atmospheric sink of crops in local and larger scales and comprehensive evaluation atmosphere terrestrial processes and exposure risks in the global Hg cycling. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/46728]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Aerosp Informat Res Inst, Beijing 100094, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gong, Cheng,Xian, Chaofan,Cui, Bowen,et al. Estimating NOx removal capacity of urban trees using stable isotope method: A case study of Beijing, China[J]. ENVIRONMENTAL POLLUTION,2021,224:-. |
| APA | Gong, Cheng.,Xian, Chaofan.,Cui, Bowen.,He, Guojin.,Wei, Mingyue.,...&Ouyang, Zhiyun.(2021).Estimating NOx removal capacity of urban trees using stable isotope method: A case study of Beijing, China.ENVIRONMENTAL POLLUTION,224,-. |
| MLA | Gong, Cheng,et al."Estimating NOx removal capacity of urban trees using stable isotope method: A case study of Beijing, China".ENVIRONMENTAL POLLUTION 224(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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