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

RPG：研究矿物质中的铁替代对金属离子吸附的影响

• 批准号: 9418788
• 负责人: Catherine Chisholm-Brause
• 金额: $ 1.8万
• 依托单位: College of William & Mary Virginia Institute of Marine Science
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-01 至 1997-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9418788&HistoricalAwards=false
• 关键词: RPG; Investigation; Effect; Iron; Substitution

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).

提出的研究旨在检验铁取代到氧化物和粘土中对金属离子吸附的影响。目的是阐明结构铁在广泛的溶液条件下的影响。通过改变金属离子吸收的溶液条件，本研究将检验矿物中铁取代对各种吸附过程的影响，如吸附到不同的两性表面位置，在粘土颗粒基面上的交换，以及多核吸附配合物的形成。提出的研究将采用湿化学实验的结合，旨在检查宏观吸附行为，光谱方法是分子水平探针的吸附复合物。这项研究将集中在使用基于同步加速器的x射线吸收光谱（XAS）。