Effects of Volatile Components on Mixing State and Size Distribution of Individual Black Carbon Aerosols
Abstract In this study, the effects of different volatile components on the mixing state and size distribution of ambient individual black carbon (BC) aerosols were measured using thermo-denudation with single-particle soot photometry and single-particle aerosol mass spectrometry from September 9 to...
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| Format: | Article |
| Language: | English |
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Springer
2022-03-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.210400 |
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| author | Kangning Li XiaoFei Wang Xiaohui Lu Hong Chen Xin Yang |
| author_facet | Kangning Li XiaoFei Wang Xiaohui Lu Hong Chen Xin Yang |
| author_sort | Kangning Li |
| collection | DOAJ |
| description | Abstract In this study, the effects of different volatile components on the mixing state and size distribution of ambient individual black carbon (BC) aerosols were measured using thermo-denudation with single-particle soot photometry and single-particle aerosol mass spectrometry from September 9 to September 27, 2018, in Shanghai, China. The volatility, chemical composition, size distribution, and core-shell structure of BC aerosol were also analysed. To understand the influence of heating temperature on the BC core-shell structure, the mixing state of ageing particles at room temperature (25°C) and the mixing state of residual material heated to 150°C and 300°C were analysed. BC was internally mixed with secondary components, such as ammonium nitrate, ammonium sulphate, a small amount of sodium nitrate, potassium nitrate, sodium sulphate and potassium sulphate, and other nonvolatile components. At 300°C, the secondary components with low volatility escaped, resulting in a thinner BC coating. However, several low-volatile non-BC substances remained, namely organic species, potassium chloride, potassium nitrate, and other nonvolatile substances. The extremely strong photochemical reaction may have produced large amounts of secondary organic carbon on the BC surface in the afternoon, with the high temperature volatilising the whole particle. However, fresh BC particles emitted from traffic during morning rush hour had ultralow volatility, with relatively fewer low-volatile components on the surface. |
| format | Article |
| id | doaj-art-6277f3879c8249a6a4c3c7ae1088a8b0 |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2022-03-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-6277f3879c8249a6a4c3c7ae1088a8b02025-02-09T12:17:13ZengSpringerAerosol and Air Quality Research1680-85842071-14092022-03-0122411310.4209/aaqr.210400Effects of Volatile Components on Mixing State and Size Distribution of Individual Black Carbon AerosolsKangning Li0XiaoFei Wang1Xiaohui Lu2Hong Chen3Xin Yang4Ningxia Key Laboratory of Intelligent Sensing for the Desert Information, School of Physics and Electronic-Electrical Engineering, Ningxia UniversityShanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan UniversityShanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan UniversityShanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan UniversitySchool of Environmental Science and Engineering, Southern University of Science and TechnologyAbstract In this study, the effects of different volatile components on the mixing state and size distribution of ambient individual black carbon (BC) aerosols were measured using thermo-denudation with single-particle soot photometry and single-particle aerosol mass spectrometry from September 9 to September 27, 2018, in Shanghai, China. The volatility, chemical composition, size distribution, and core-shell structure of BC aerosol were also analysed. To understand the influence of heating temperature on the BC core-shell structure, the mixing state of ageing particles at room temperature (25°C) and the mixing state of residual material heated to 150°C and 300°C were analysed. BC was internally mixed with secondary components, such as ammonium nitrate, ammonium sulphate, a small amount of sodium nitrate, potassium nitrate, sodium sulphate and potassium sulphate, and other nonvolatile components. At 300°C, the secondary components with low volatility escaped, resulting in a thinner BC coating. However, several low-volatile non-BC substances remained, namely organic species, potassium chloride, potassium nitrate, and other nonvolatile substances. The extremely strong photochemical reaction may have produced large amounts of secondary organic carbon on the BC surface in the afternoon, with the high temperature volatilising the whole particle. However, fresh BC particles emitted from traffic during morning rush hour had ultralow volatility, with relatively fewer low-volatile components on the surface.https://doi.org/10.4209/aaqr.210400Black carbonMixing stateSize distributionsVolatility |
| spellingShingle | Kangning Li XiaoFei Wang Xiaohui Lu Hong Chen Xin Yang Effects of Volatile Components on Mixing State and Size Distribution of Individual Black Carbon Aerosols Aerosol and Air Quality Research Black carbon Mixing state Size distributions Volatility |
| title | Effects of Volatile Components on Mixing State and Size Distribution of Individual Black Carbon Aerosols |
| title_full | Effects of Volatile Components on Mixing State and Size Distribution of Individual Black Carbon Aerosols |
| title_fullStr | Effects of Volatile Components on Mixing State and Size Distribution of Individual Black Carbon Aerosols |
| title_full_unstemmed | Effects of Volatile Components on Mixing State and Size Distribution of Individual Black Carbon Aerosols |
| title_short | Effects of Volatile Components on Mixing State and Size Distribution of Individual Black Carbon Aerosols |
| title_sort | effects of volatile components on mixing state and size distribution of individual black carbon aerosols |
| topic | Black carbon Mixing state Size distributions Volatility |
| url | https://doi.org/10.4209/aaqr.210400 |
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