Effects of combustion temperature on the optical properties of brown carbon from biomass burning

作     者：Peng Gao Rule Deng Song Jia Yue Li Xuefei Wang Qian Xing Peng Gao;Rule Deng;Song Jia;Yue Li;Xuefei Wang;Qian Xing

作者机构：School of Chemistry SciencesUniversity of Chinese Academy of SciencesBeijing 100049China College of Chemistry and Materials EngineeringBeijing Technology and Business UniversityBeijing 100048China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2024年第137卷第3期

页      面：302-309页

核心收录：

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 0703[理学-化学] 

基　　金：financially supported by the Natural Science Foundation of Beijing Municipality (No.8222074) the National Natural Science Foundation of China (No.81961138011) 

主　　题：Biomass burning Combustion temperature Methanol-soluble brown carbon EEM Impinger 

摘      要：Biomass burning has been known as one of main sources of Brown Carbon(BrC)in *** this study,by controlling the combustion temperature at 250℃,350℃,and 450℃,the methanol soluble organic carbon(MSOC)and methanol insoluble carbon(MISC)from pine wood burning was collected by ***–Vis,excitation emission matrix(EEM),TEM and FTIR spectra were applied to investigate the properties of BrC *** MSOC at 250℃ and 350℃,all the spectral profiles of UV–Vis absorption and excitation emission matrix are almost the same,while the EEM of MSOC at 450℃ are different from that of the other *** MISC fuorescence was observed only in the case of 450℃.In the FTIR spectra,with the temperature increasing the peaks associated to the oxygen-contained functions was weakened,indicating the formation of the fuorophores with larger conjugated system,especially aromatic *** results show that biomass combustion at low temperature produces more oxygen-riched BrC,which possesses relatively lower light absorption,while at high temperature produces more aromatics hydrocarbons with relatively strong light *** results of this work are helpful to trace the source of brown carbon and optimize biomass energy utilization.