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• W4386315439 abstract "Particulate matter from biomass burning is considered to be one of the major sources of air pollution in China. To examine the characteristics of the particles emitted from the burning of crop straw, an open burning experiment is designed. Individual particles are collected in the flaming and smouldering stages, and analysed by individual particle analyses represented by high‐resolution transmission electron microscopy equipped with the energy‐dispersive X‐ray spectrometer. Five types of particles are identified, namely, pure organic particle, organic particle‐K (OP‐K), tar ball, K‐rich and soot particles. Of these, the OP‐K particles have the highest relative number percentage in all analysed particles in both the flaming and smouldering stages. Interestingly, the microscopic morphology of organic particles is completely different in the flaming and smouldering stages, being near‐spherical in the flaming stage and gel‐like in the smouldering stage. According to the elemental compositions, most of OP‐K particles contained potassium compounds in the form of KCl and K 2 SO 4 . High combustion efficiency and temperature promote the formation of crystal structure, resulting in the onion‐like microstructure of soot particles. Apparently, the soot microstructure is a fingerprint feature that helps identify combustion sources. In addition, the particles emitted in the flaming stage are smaller than those in the smouldering stage, implying that high temperature combustion tends to be associated with high combustion efficiency. The relationship between burning temperatures and particle sizes can help to understand the emission of particles from crop straw burning and find new ways to solve the problems caused by straw burning. The results of this study can provide more detailed ‘fingerprint’ characteristics of the particulate matter emitted from biomass‐burning sources, and an understanding of their potential impact on the atmospheric environment." @default.
• W4386315439 created "2023-09-01" @default.
• W4386315439 creator A5018593621 @default.
• W4386315439 creator A5023003445 @default.
• W4386315439 creator A5023545222 @default.
• W4386315439 creator A5034135008 @default.
• W4386315439 creator A5068081035 @default.
• W4386315439 creator A5080121245 @default.
• W4386315439 creator A5081435173 @default.
• W4386315439 date "2023-08-31" @default.
• W4386315439 modified "2023-10-01" @default.
• W4386315439 title "Fresh organic and soot particles from crop straw burning: Morphology, composition and size distribution" @default.
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