Surface-enhanced Raman scattering for mixing state characterization of individual fine particles during a haze episode in Beijing, China
文献类型：期刊论文
| 作者 | Chen, Hui; Duan, Fengkui; Du, Jingjing; Yin, Ranhao; Zhu, Lidan; Dong, Jinlu; He, Kebin; Sun, Zhenli; Wang, Suhua |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| 出版日期 | 2021-06 |
| 卷号 | 104页码:216-224 |
| 关键词 | PM2.5 Surface-enhanced Raman scattering Individual fine particle Nitrate Sulfate Soot |
| ISSN号 | 1001-0742 |
| 英文摘要 | The nondestructive characterization of the mixing state of individual fine particles using the traditional single particle analysis technique remains a challenge. In this study, fine particles were collected during haze events under different pollution levels from September 5 to 11 2017 in Beijing, China. A nondestructive surface-enhanced Raman scattering (SERS) technique was employed to investigate the morphology, chemical composition, and mixing state of the multiple components in the individual fine particles. Optical image and SERS spectral analysis results show that soot existing in the form of opaque material was predominant during clear periods (PM2.5 <= 75 mu g/m(3)). During polluted periods (PM2.5 > 75 mu g/m(3)), opaque particles mixed with transparent particles (nitrates and sulfates) were generally observed. Direct classical least squares analysis further identified the relative abundances of the three major components of the single particles: soot (69.18%), nitrates (28.71%), and sulfates (2.11%). A negative correlation was observed between the abundance of soot and the mass concentration of PM2.5. Furthermore, mapping analysis revealed that on hazy days, PM2.5 existed as a core-shell structure with soot surrounded by nitrates and sulfates. This mixing state analysis method for individual PM2.5 particles provides information regarding chemical composition and haze formation mechanisms, and has the potential to facilitate the formulation of haze prevention and control policies. (C) 2020 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46077]  |
| 专题 | 生态环境研究中心_水污染控制实验室 |
| 作者单位 | 1.Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China 2.North China Elect Power Univ, Coll Environm Sci & Engn, MOE Key Lab Resources & Environm Syst Optimizat, Beijing 102206, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 4.Guangdong Univ Petrochem Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Petrochemcial Pollut Proc, Maoming 5 |
| 推荐引用方式 GB/T 7714 | Chen, Hui,Duan, Fengkui,Du, Jingjing,et al. Surface-enhanced Raman scattering for mixing state characterization of individual fine particles during a haze episode in Beijing, China[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2021,104:216-224. |
| APA | Chen, Hui.,Duan, Fengkui.,Du, Jingjing.,Yin, Ranhao.,Zhu, Lidan.,...&Wang, Suhua.(2021).Surface-enhanced Raman scattering for mixing state characterization of individual fine particles during a haze episode in Beijing, China.JOURNAL OF ENVIRONMENTAL SCIENCES,104,216-224. |
| MLA | Chen, Hui,et al."Surface-enhanced Raman scattering for mixing state characterization of individual fine particles during a haze episode in Beijing, China".JOURNAL OF ENVIRONMENTAL SCIENCES 104(2021):216-224. |
入库方式： OAI收割
来源：生态环境研究中心
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