Fluorescence fingerprinting properties for exploring water-soluble organic compounds in PM2.5 in an industrial city of northwest China
文献类型：期刊论文
| 作者 | Mu, Situ; Tan, Jihua; Hu, Jingnan; Xiao, Kang; Duan, Jingchun; Zhou, Xueming; Zhang, Leiming; Qin, Juanjuan |
| 刊名 | ATMOSPHERIC ENVIRONMENT
 |
| 出版日期 | 2018-07-01 |
| 卷号 | 184页码:203-211 |
| 关键词 | Fluorescence properties Excitation-emission matrix spectra Aerosol source apportionment Urban environment |
| ISSN号 | 1352-2310 |
| 文献子类 | Article |
| 英文摘要 | Excitation-emission matrix (EEM) spectra were used to analyze the fluorescence properties of water-soluble organic compounds (WSOC) in PM2.5 during winter and summer seasons in Lanzhou city, northwest China. Protein-like substances, humic-like substances and microbial by-products were found to be the main fluorophoric organic matter. Humification index (HIX), biological index (BIX) and fluorescence index (FI) were 1.2 +/- 0.1, 1.4 +/- 0.1 and 1.7 +/- 0.2 in winter and 2.0 +/- 0.3, 1.3 +/- 0,1 and 1.2 +/- 0.4 in summer, respectively, indicating higher aromaticity of WSOC in summer and terrestrial biogenic sources of WSOC in both seasons. Strong correlations were found between regional average fluorescence intensities (RAFI) at the fluorescence regions of II-V and water-soluble inorganic ions (K+, Cl, NO3- and SO42-) in winter with the Spearman correlation coefficients rho being larger than 0.7 and mostly around 0.9, suggesting significant contributions of bioaerosols, coal combustion and vehicle exhaust to PM2.5. Moderate correlations were found between RAFI and K+, Cl-, and NO3- in summer, indicating the more important roles of biogenic and vehicle exhaust than coal combustion sources in summer. High temperature in winter was conducive to and in summer prohibitive to polycondensation of WSOC, indicating the existence of an optimum temperature for such a process to occur. High relative humidity was unfavorable to the formation of fluorescent WSOC. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41146]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Mu, Situ,Tan, Jihua,Hu, Jingnan,et al. Fluorescence fingerprinting properties for exploring water-soluble organic compounds in PM2.5 in an industrial city of northwest China[J]. ATMOSPHERIC ENVIRONMENT,2018,184:203-211. |
| APA | Mu, Situ.,Tan, Jihua.,Hu, Jingnan.,Xiao, Kang.,Duan, Jingchun.,...&Qin, Juanjuan.(2018).Fluorescence fingerprinting properties for exploring water-soluble organic compounds in PM2.5 in an industrial city of northwest China.ATMOSPHERIC ENVIRONMENT,184,203-211. |
| MLA | Mu, Situ,et al."Fluorescence fingerprinting properties for exploring water-soluble organic compounds in PM2.5 in an industrial city of northwest China".ATMOSPHERIC ENVIRONMENT 184(2018):203-211. |
入库方式： OAI收割
来源：生态环境研究中心
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