RPG: Investigation of the Effect of Iron Substitution in Minerals on Metal-Ion Sorption

9418788 Chisholm-Brause拟议的研究旨在检查铁取代成氧化物和粘土对金属离子吸附的影响。 我们的目标是阐明结构铁在广泛的解决方案条件的影响。 通过改变金属离子吸收的溶液条件，本研究将研究矿物中的铁取代对各种吸附过程的影响，例如吸附到不同的两性表面位点，在粘土颗粒的基面交换，以及形成多核吸附络合物。 拟议的研究将采用湿化学实验和光谱方法相结合的方法，湿化学实验旨在检查宏观吸附行为，光谱方法是吸附复合物的分子水平探针。 这项研究将集中在使用同步加速器为基础的X射线吸收光谱（XAS）。

9418788 Chisholm-Brause The proposed study is designed to examine the effects of iron substituted into oxides and clays on metal-ion sorption. The goal is to elucidate the effects of structural iron over a broad range of solution conditions. By varying the solution conditions for metal-ion uptake, this research will examine the effect of iron substitution in minerals for various sorption processes, such as adsorption to distinct amphoteric surface sites, exchange at the basal planes of clay particles, and formation of multinuclear sorption complexes. the proposed research will employ a combination of wet-chemical experiments, designed to examine macroscopic sorption behavior, and spectroscopic methods which are molecular level probes of the sorption complex. This research will focus on use of synchrotron-based x-ray absorption spectroscopy (XAS).