Speciation of the major inorganic salts in atmospheric aerosols of Beijing, China: Measurements and comparison with model
文献类型：期刊论文
| 作者 | Tang, Xiong; Zhang, Xiaoshan; Ci, Zhijia; Guo, Jia; Wang, Jiaqi |
| 刊名 | ATMOSPHERIC ENVIRONMENT
 |
| 出版日期 | 2016-05 |
| 卷号 | 133期号:0页码:123-134 |
| 关键词 | Speciation Inorganic salts Gas-aerosol partitioning Thermodynamic equilibrium |
| 英文摘要 | In the winter and summer of 2013-2014, we used a sampling system, which consists of annular denuder, bacic-up filter and thermal desorption set-up, to measure the speciation of major inorganic salts in aerosols and the associated trace gases in Beijing. This sampling system can separate volatile ammonium salts (NH4NO3 and NH4Cl) from non-volatile ammonium salts ((NH4)(2)SO4), as well as the non-volatile nitrate and chloride. The measurement data was used as input of a thermodynamic equilibrium model (ISORROPIA II) to investigate the gas aerosol equilibrium characteristics. Results show that (NH4)(2)SO4, NH4NO3 and NH4Cl were the major inorganic salts in aerosols and mainly existed in the fine particles. The sulfate, nitrate and chloride associated with crustal ions were also important in Beijing where mineral dust concentrations were high. About 19% of sulfate in winter and 11% of sulfate in summer were associated with crustal ions and originated from heterogeneous reactions or direct emissions. The nonvolatile nitrate contributed about 33% and 15% of nitrate in winter and summer, respectively. Theoretical thermodynamic equilibrium calculations for NH4NO3 and NH4Cl suggest that the gaseous precursors were sufficient to form stable volatile ammonium salts in winter, whereas the internal mixing with sulfate and crustal species were important for the formation of volatile ammonium salts in summer. The results of the thermodynamic equilibrium model reasonably agreed with the measurements of aerosols and gases, but large discrepancy existed in predicting the speciation of inorganic ammonium salts. This indicates that the assumption on crustal species in the model was important for obtaining better understanding on gas aerosol partitioning and improving the model prediction. (C) 2016 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35715]  |
| 专题 | 生态环境研究中心_大气环境科学实验室 |
| 推荐引用方式 GB/T 7714 | Tang, Xiong,Zhang, Xiaoshan,Ci, Zhijia,et al. Speciation of the major inorganic salts in atmospheric aerosols of Beijing, China: Measurements and comparison with model[J]. ATMOSPHERIC ENVIRONMENT,2016,133(0):123-134. |
| APA | Tang, Xiong,Zhang, Xiaoshan,Ci, Zhijia,Guo, Jia,&Wang, Jiaqi.(2016).Speciation of the major inorganic salts in atmospheric aerosols of Beijing, China: Measurements and comparison with model.ATMOSPHERIC ENVIRONMENT,133(0),123-134. |
| MLA | Tang, Xiong,et al."Speciation of the major inorganic salts in atmospheric aerosols of Beijing, China: Measurements and comparison with model".ATMOSPHERIC ENVIRONMENT 133.0(2016):123-134. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。