中国家庭农作物废弃物燃烧产生的一次有机气溶胶排放的挥发性分布。
Volatility distribution of primary organic aerosol emissions from household crop waste combustion in China.
作者信息
Chen Peng, Wang Zihao, Zhang Yangmei, Guo Tailun, Li Youxuan, Hopke Philip K, Li Xinghua
机构信息
School of Space and Environment, Beihang University, Beijing, 100191, China.
State Key Laboratory of Severe Weather/Key Laboratory of Atmospheric Chemistry of China Meteorological Administration, Chinese Academy of Meteorological Sciences, Beijing, 100081, China.
出版信息
Environ Pollut. 2023 Apr 15;323:121353. doi: 10.1016/j.envpol.2023.121353. Epub 2023 Feb 24.
Biomass-burning emissions are a significant source of primary organic aerosol (POA). Volatility is one of the most important physical properties of organic aerosol (OA). Dilution and thermodenuder (TD) measurements were used to investigate the volatility of POA from household crop waste combustion in China. Between 10% and 30% of the POA desorbed when diluted from 20:1 to 120:1, while 10%-40% of POA evaporated in the TD when heated to 150 °C. Thus, a considerable proportion of the POA emissions were volatile. A dynamic mass transfer model was applied to derived volatility distributions of POA based on TD data. A best fit volatility distributions for POA and associated mass accommodation coefficients (α), and the enthalpy of vaporization (ΔH) were presented. The emissions factors and volatility distribution of POA emission from household crop waste combustion in this study can be used to improve emission inventories and simulate gas-particle partitioning of organic aerosol in chemical transport models.
生物质燃烧排放是一次有机气溶胶（POA）的重要来源。挥发性是有机气溶胶（OA）最重要的物理性质之一。采用稀释和热脱附仪（TD）测量方法研究了中国家庭农作物废弃物燃烧产生的POA的挥发性。当稀释比例从20:1变为120:1时，10%至30%的POA会解吸，而在热脱附仪中加热至150°C时，10%至40%的POA会蒸发。因此，相当一部分POA排放是挥发性的。基于热脱附仪数据，应用动态传质模型推导POA的挥发性分布。给出了POA的最佳拟合挥发性分布以及相关的质量容纳系数（α）和汽化焓（ΔH）。本研究中家庭农作物废弃物燃烧产生的POA排放因子和挥发性分布可用于改进排放清单，并在化学传输模型中模拟有机气溶胶的气粒分配。
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