热光反射法测量分析大气中有机碳与元素碳的含量.doc

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摘  要:大气气溶胶中的有机碳(OC)、元素碳(EC)因为其独特的环境、气候效应以及对人类健康的影响日渐成为世界各国环境科学家们共同关注的热点。文章中首先介绍了有机碳、元素碳和气溶胶中水溶性有机物的组成、来源以及结构特征;其次,详细叙述了热学和光学分析OC、EC的原理方法并对这些方法进行了系统化的比较。除此以外,文章还介绍了气溶胶样品的采集方法和OC/EC分析仪的结构参数,技术特点。在最后,依据热-光反射法原理,利用OC/EC分析仪测定了样品中的有机碳、元素碳的含量,分析大气中元素碳和有机碳的浓度比例变化趋势,同时研究了含碳气溶胶的区域时间变化特征及变化趋势,为有效控制大气中气溶胶的含量,减少空气污染总量提供了理论基础。

关键词:有机碳;元素碳;热光反射法

 

Abstract: Because of their unique effect on environment and climate, as well as the impact on human health, the organic carbon (OC) and elemental carbon (EC) in atmospheric aerosols drawn growing concern by environmental scientists all over the worlld. Firstly, this thesis introduces the composition, sources and structure characteristics of OC, EC, WSOC. Secondly, the thermal and optical analysis of OC, EC principle method are introduced in detail and then compared these method systematically. In addition, the thesis also relates to the sample collection method, OC/EC analyzer structure parameters, and technical characteristics. At last, based on the principle of thermal reflection method, using the OC/EC analyzer determination in samples content of organic carbon and elemental carbon, we analysis the concentration change trend of organic carbon and elemental carbon in the atmosphere, also research the regional time variation characteristics and trend of carbonaceous aerosol. This research can provide theoretical basis for the effective control of atmospheric aerosol levels, and the reduction of the total amount of air pollution.

Key words: Organic Carbon; Elemental Carbon; Thermo Optical Reflection

 

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