Chemical characteristics of airborne particles in Xi'an, inland China during dust storm episodes: Implications for heterogeneous formation of ammonium nitrate and enhancement of N-deposition
文献类型：期刊论文
| 作者 | Wu, Can2,5; Wang, Gehui1,2,3,4,5; Cao, Cong2,5; Li, Jianjun5; Li, Jin2,5; Wu, Feng5; Huang, Rujin5; Cao, Junji5; Han, Yongmin5; Ge, Shuangshuang4 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2019 |
| 卷号 | 244页码:877-884 |
| 关键词 | Asian dust Size distributions Composition Source Nitrogen deposition |
| ISSN号 | 0269-7491 |
| DOI | 10.1016/j.envpol.2018.10.019 |
| 通讯作者 | Wang, Gehui(ghwang@geo.ecnu.edu.cn) |
| 英文摘要 | To identify the sources and heterogeneous reactions of sulfate and nitrate with dust in the atmosphere, airborne particles in Xi'an, inland China during the spring of 2017 were collected and measured for chemical compositions, along with a laboratory simulation of the heterogeneous formation of ammonium nitrate on the dust surface. Our results showed that concentrations of Ca2+, Na+ and Cl- in the TSP samples were enhanced in the dust events, with the values of 41.8, 5.4 and 4.0 mu g m(-3), respectively, while NO3- (7.1 mu g m(-3)) and NH4+ (2.4 mu g m(-3)) remarkably decreased, compared to those in the non-dust periods. During the dust events, NH4+ correlated only with NO3- (R-2 = 0.52) and abundantly occurred in the coarse mode (>2.1 mu m), in contrast to that in the non-dust periods, which well correlated with sulfate and nitrate and enriched in the fine mode (<2.1 mu m). SO42- in Xi'an during the dust events existed mostly as gypsum (CaSO4 center dot 2H(2)O) and mirabilite (Na2SO4 center dot 10H(2)O) and dominated in the coarse mode, suggesting that they were directly transported from the upwind Gobi Desert region. Our laboratory simulation results showed that during the long-range transport hygroscopic salts in the Gobi dust such as mirabilite can absorb water vapor and form a liquid phase on the particle surface, then gaseous NH3 and HNO3 partition into the aqueous phase and form NH4NO3, resulting in the strong correlation of NH4+ with NO3- and their accumulation on dust particles. The dry deposition flux of total inorganic nitrogen (NH4+ + NO3-) in Xi'an during the dust events was 0.97 mg-N m(-2) d(-1) and 37% higher than that in the non-dust periods. Such a significant enhanced N-deposition is ascribed to the heterogeneous formation of NH4NO3 on the dust particle surface, which has been ignored and should be included in future model simulations. (C) 2018 Elsevier Ltd. All rights reserved. |
| WOS关键词 | ASIAN DUST ; NITROGEN DEPOSITION ; MINERAL DUST ; DRY DEPOSITION ; ATMOSPHERIC AEROSOLS ; DESERT DUST ; SIZE ; EVENTS ; IMPACT ; CHEMISTRY |
| 资助项目 | National Key R&D Plan (Quantitative Relationship and Regulation Principle between Regional Oxidation Capacity of Atmospheric and Air Quality)[2017YFC0210000] ; China National Natural Science Funds for Distinguished Young Scholars[41325014] ; National Nature Science Foundation of China[41773117] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000452940700094 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Key R&D Plan (Quantitative Relationship and Regulation Principle between Regional Oxidation Capacity of Atmospheric and Air Quality) ; China National Natural Science Funds for Distinguished Young Scholars ; National Nature Science Foundation of China |
| 源URL | [http://ir.ieecas.cn/handle/361006/14508]  |
| 专题 | 地球环境研究所_粉尘与环境研究室 |
| 通讯作者 | Wang, Gehui |
| 作者单位 | 1.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China 4.East China Normal Univ, Sch Geog Sci, Minist Educ, Key Lab Geog Informat Sci, Shanghai 210062, Peoples R China 5.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Can,Wang, Gehui,Cao, Cong,et al. Chemical characteristics of airborne particles in Xi'an, inland China during dust storm episodes: Implications for heterogeneous formation of ammonium nitrate and enhancement of N-deposition[J]. ENVIRONMENTAL POLLUTION,2019,244:877-884. |
| APA | Wu, Can.,Wang, Gehui.,Cao, Cong.,Li, Jianjun.,Li, Jin.,...&Wang, Xinpei.(2019).Chemical characteristics of airborne particles in Xi'an, inland China during dust storm episodes: Implications for heterogeneous formation of ammonium nitrate and enhancement of N-deposition.ENVIRONMENTAL POLLUTION,244,877-884. |
| MLA | Wu, Can,et al."Chemical characteristics of airborne particles in Xi'an, inland China during dust storm episodes: Implications for heterogeneous formation of ammonium nitrate and enhancement of N-deposition".ENVIRONMENTAL POLLUTION 244(2019):877-884. |
入库方式： OAI收割
来源：地球环境研究所
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