Yang Ziming, Fu Xuan
Department of Chemistry, Oakland University;
Department of Chemistry, Oakland University.
J Vis Exp. 2018 Aug 8(138):58230. doi: 10.3791/58230.
Organic-mineral interactions are widely occurring in hydrothermal environments, such as hot springs, geysers on land, and the hydrothermal vents in the deep ocean. Roles of minerals are critical in many hydrothermal organic geochemical processes. Traditional hydrothermal methodology, which includes using reactors made of gold, titanium, platinum, or stainless-steel, is usually associated with the high cost or undesired metal catalytic effects. Recently, there is a growing tendency for using the cost-effective and inert quartz or fused silica glass tubes in hydrothermal experiments. Here, we provide a protocol for carrying out organic-mineral hydrothermal experiments in silica tubes, and we describe the essential steps in the sample preparation, experimental setup, products separation, and quantitative analysis. We also demonstrate an experiment using a model organic compound, nitrobenzene, to show the effect of an iron-containing mineral, magnetite, on its degradation under a specific hydrothermal condition. This technique can be applied to study complex organic-mineral hydrothermal interactions in a relatively simple laboratory system.
有机-矿物相互作用在热液环境中广泛存在，如温泉、陆地上的间歇泉以及深海热液喷口。矿物在许多热液有机地球化学过程中起着关键作用。传统的热液方法，包括使用由金、钛、铂或不锈钢制成的反应器，通常伴随着高成本或不期望的金属催化效应。最近，在热液实验中使用具有成本效益且惰性的石英或熔融石英玻璃管的趋势日益增长。在此，我们提供了一种在石英管中进行有机-矿物热液实验的方案，并描述了样品制备、实验装置、产物分离和定量分析的基本步骤。我们还展示了一个使用模型有机化合物硝基苯的实验，以表明含铁矿物磁铁矿在特定热液条件下对其降解的影响。该技术可应用于在相对简单的实验室系统中研究复杂的有机-矿物热液相互作用。
