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

原位研究铁表面卤代烃和共吸附物吸附质-吸附质反应的动力学和机理

• 批准号: 9612732
• 负责人: Donald Land
• 金额: $ 25.8万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-07-15 至 1999-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9612732&HistoricalAwards=false
• 关键词: Kinetics; Mechanisms; Adsorbate; Reactions; Halocarbons

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.

小型有机氯化合物脱氯的机制和动力学研究是分析和表面化学计划支持的这一研究项目的重点。 将使用独特的脱附和识别反应中间体的仪器来检查模型铁和氧化铁表面上的氯代烃和多氯联苯的脱氯作用。 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的表面反应的机理和动力学的信息，这些信息不能以其他方式获得。 这些信息可能对含氯碳氢化合物的环境补救过程的发展产生重大影响。 从土壤和地下水中消除含卤素的碳氢化合物是一项重要的环境任务。 该项目由分析和表面化学计划支持的研究使用了独特的技术组合，可以识别和量化表面和气相中的反应中间体，以帮助我们了解固体表面上的脱卤化学。 这种理解将使设计更有效的环境补救办法，这些广泛分布的污染物。