Kinetics and Mechanisms of Adsorbate - Adsorbate Reactions of Halocarbons and Coadsorbates on Iron Surfaces Studied In Situ

小型有机氯化合物脱氯的机理和动力学研究是本研究项目的重点，该研究项目由分析和表面化学计划支持。在模型铁和氧化铁表面上氯碳和多氯联苯的脱氯将使用独特的仪器进行检查，用于解吸和识别反应中间体。傅里叶变换反射吸收红外光谱与激光解吸傅里叶变换质谱的结合将提供这些重要表面反应的机理和动力学信息，而这些信息是其他方法无法获得的。这一信息可能对含氯烃环境修复工艺的发展产生重大影响。从土壤和地下水中去除含卤碳氢化合物是一项重要的环境任务。本项目由分析和表面化学项目支持的研究使用了一种独特的技术组合，可以识别和量化表面和气相的反应中间体，以帮助我们发展对固体表面脱卤化学的理解。这一认识将有助于设计出更有效的环境修复方法来对付这些广泛分布的污染物。

The study of the mechanisms and kinetics of the dechlorination of small organochlorine compounds forms the focus of this research project supported in the Analytical and Surface Chemistry Program. Dechlorination of chlorocarbons and polychlorinated biphenyls on model iron and iron oxide surfaces will be examined using unique instrumentation for desorbing and identifying reaction intermediates. The combination of Fourier-transform reflection absorption infrared spectroscopy with laser desorption Fourier-transform mass spectrometry will provide information about the mechanisms and kinetics of these important surface reactions which can not be otherwise obtained. This information may have a significant impact on the development of environmental remediation processes for chlorine containing hydrocarbons. The elimination of halogen containing hydrocarbons from soils and groundwaters is an important environmental task. The research supported in this project by the Analytical and Surface Chemistry program uses a unique combination of techniques which can identify and quantify reaction intermediates on surfaces and in the gas phase, to help in the development of our understanding of dehalogenation chemistry on solid surfaces. This understanding will enable the design of more effective environmental remediation approaches for these widely dispersed contaminants.