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首页> 外文期刊>Geophysical Research Letters >Two-process model for the atmospheric weathering, oxidation and ageing of diesel soot
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Two-process model for the atmospheric weathering, oxidation and ageing of diesel soot

机译：柴油烟尘的大气风化，氧化和老化的两过程模型

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摘要

The weathering characteristic of diesel exhaust particulate (DEP) matter is spectroscopically obtained by an atmospheric study under realistic, ambient conditions. DEP subjected to weathering by exposure to ambient atmosphere (air, humidity, solar radiation, and temperature variation) for seven weeks shows systematic changes in C(1 s) x-ray absorption spectra. Quantitative analysis suggests that volatile polycyclic aromatic hydrocarbons are released from the DEP by desorption, paralleled or followed by decomposition and reaction of the amorphous part of the solid, non-volatile carbon and potential other volatile species. The observed spectral changes are rationalized in a simple two phase model and parameterized, combining desorption of volatiles and oxidation of carbon matrix. The weathering characteristics of soot is generalized toward biomass burning products and identified as a vector quantity to be implemented for climate modelling.
机译：柴油机排气微粒（DEP）物质的风化特性是通过在现实的环境条件下进行的大气研究获得的。 DEP暴露于环境大气（空气，湿度，太阳辐射和温度变化）持续七个星期而经受风化，显示C（1 s）X射线吸收光谱的系统变化。定量分析表明，挥发性多环芳烃通过解吸，平行或随后分解，固态的无定形部分，非挥发性碳和潜在的其他挥发性物质分解和反应而从DEP中释放出来。观察到的光谱变化在简单的两相模型中进行了合理化并进行了参数化，结合了挥发物的解吸和碳基质的氧化。烟灰的风化特性被推广到生物质燃烧产物，并被确定为要用于气候建模的向量数量。

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