Morphology and Composition of Insoluble Brown Carbon from Biomass Burning

被引：4
|
作者：
Gao, Peng [1 ]
Zhou, Changle [1 ]
Lian, Chaofan [1 ,2 ]
Wang, Xuefei [1 ,3 ]
Wang, Weigang [2 ]
机构：
[1] Univ Chinese Acad Sci, Sch Chem Sci, Beijing 100049, Peoples R China
[2] Chinese Acad Sci, State Key Lab Struct Chem Unstable & Stable Speci, Beijing Natl Lab Mol Sci BNLMS, CAS Res Educ Ctr Excellence Mol Sci,Inst Chem, Beijing 100190, Peoples R China
[3] 19 A Yuquan Rd, Beijing 100049, Peoples R China
来源：
ACS EARTH AND SPACE CHEMISTRY | 2022年 / 6卷 / 06期
基金：
中国国家自然科学基金;
关键词：
brown carbon; biomass burning; impinger; black carbon; fluorescence imaging; LIGHT-ABSORPTION; ORGANIC-MATTER; AEROSOLS; URBAN; FLUORESCENCE; CHEMISTRY;
D O I：
10.1021/acsearthspacechem.2c00064
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Biomass burning (BB) is a primary source of brown carbon (BrC) in the atmosphere. In the present work, for the first time, the application of an impinger for BrC collection was investigated by conducting BB in a home-built setup. UV-vis, fluorescence, and IR measurements indicated that BrC samples collected by the impinger method have the same properties as those collected by the quartz filter method. In addition to exhibiting good BrC collection performance, the impinger was proven to be effective in concentrating methanol-insoluble substances from the smoke plume. Although elemental analysis and IR spectroscopy revealed that the insoluble substances were mainly composed of plant fibers, the fluorescence emission results showed the presence of BrC, and STEM analysis revealed that BrC was characterized by particles strung on wire-like plant fibers.
引用
收藏
页码：1574 / 1580
页数：7
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