Experimental carbonate geochemistry and diagenesis

我的研究重点是生物地球化学过程的机制和速率，我的方法是受控实验室实验、建模和实地研究的结合。拟议的研究将在两个空间尺度上进行：分子/界面尺度(碳酸盐矿物的表面化学)和宏观尺度(沉积物成岩作用)，但这两个项目密切相关。在第一个方案中，目标是开发一个能够预测：1)碳酸盐矿物在各种环境条件下的吸附行为和2)这些矿物的反应(溶解/沉淀)动力学的机理模型。碳酸盐矿物表面具有很高的活性，决定了各种水生环境(如碳酸盐含水层、海洋沉积物、尾矿)中微量元素的浓度和流动性。尽管碳酸盐矿物具有环境意义(修复和替代古环境重建)和广泛的工业应用，包括最近在二氧化碳矿物固定战略方面的努力，但碳酸盐矿物在水溶液中的反应性的许多方面尚未阐明。

My research focuses on the mechanisms and rates of biogeochemical processes and my approach is a blend of controlled laboratory experiments, modeling, and field studies. The proposed research will be carried out at two spatial scales: the molecular/interfacial scale (surface chemistry of carbonate minerals) and macroscopic scale (sediment diagenesis) but both programs are intimately related. In the first program, the objective is to develop a mechanistic model capable of predicting: 1) the sorption behaviour of carbonate minerals under a variety of environmental conditions and 2) the kinetics of reaction (dissolution/precipitation) of these minerals. The surfaces of carbonate minerals are highly reactive and determine the concentration and mobility of trace elements in a variety of aquatic environments (e.g., carbonate aquifers, marine sediments, mine tailings). Despite their environmental significance (remediation and proxies for paleoenvironmental reconstructions) and broad industrial applications, including the recent thrust in CO2 mineral sequestration strategies, many aspects of the reactivity of carbonate minerals in aqueous solutions have yet to be elucidated.