资源类型

期刊论文 1

年份

2016 1

关键词

检索范围：

排序： 展示方式：

Online single particle analysis of chemical composition and mixing state of crop straw burning particles: from laboratory study to field measurement

Juntao HUO,Xiaohui LU,Xinning WANG,Hong CHEN,Xingnan YE,Song Gao,Deborah S. Gross,Jianmin CHEN,Xin YANG

《环境科学与工程前沿（英文）》 2016年 第10卷 第2期   页码 244-252 doi: 10.1007/s11783-015-0768-z

摘要： Fresh straw burning (SB) particles were generated in the laboratory by the combustion of rice straw and corn straw. The chemical composition and mixing state of the fresh SB particles were investigated by an Aerosol Time-of-Flight Mass Spectrometer (ATOFMS). Based on the mass spectral patterns, the SB particles were clustered into four major types: Salt, Organic Carbon (OC), Elemental Carbon (EC), and internally mixed particles of EC and OC (EC-OC). In addition, particles containing ash, polycyclic aromatic hydrocarbons, heavy metals or nicotine were also observed. Physical and chemical changes of the SB particles immediately after the emission were analyzed with highly time-resolved data. During the aging processes, the average particle size increased steadily. Freshly emitted organic compounds were gradually oxidized to more oxygenated compounds in the OC-containing particles. Meanwhile, an important displacement reaction (2KCl+ → K SO + 2Cl ) was observed. The marker ions for SB particles were optimized and applied to identify the SB particles in the ambient atmosphere. The fluctuation of the number fraction of ambient SB particles sorted by ATOFMS agrees well with that of water soluble K measured by an online ion chromatography, demonstrating that the optimized marker ions could be good tracers for SB particles in field measurements.

关键词： crop straw burning particles     mixing state     aging process     ATOFMS     ion markers    

HTML PDF 收藏

标题 作者 时间 类型 操作

Online single particle analysis of chemical composition and mixing state of crop straw burning particles: from laboratory study to field measurement

Juntao HUO,Xiaohui LU,Xinning WANG,Hong CHEN,Xingnan YE,Song Gao,Deborah S. Gross,Jianmin CHEN,Xin YANG

期刊论文