Cation Separations with High Capacity Swelling Micas

使用高容量溶胀云母进行阳离子分离

• 批准号: 0242285
• 负责人: Sridhar Komarneni
• 金额: $ 20.53万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-03-15 至 2007-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0242285&HistoricalAwards=false
• 关键词: Cation; Separations; Capacity; Swelling; Micas

AbstractProposal Title: Cation Separations with High Capacity Swelling MicasProposal Number: CTS-0242285Principal Investigator: Sridhar KomarneniInstitution: Pennsylvania State UniversityThe objective of the proposed research is to synthesize and characterize novel micas for use as cation-exchange materials. In previous work, micas with both tetrahedral and octahedral negative charge were synthesized. The location of the charge is expected to have implications for capacity as well as selectivity of ions. In the present work fundamental cation-exchange and equilibria in sodium-based mica exchangers with both tetrahedral and octahedral negative charges will be investigated. Exchange kinetics and equilibria involving ions such as cesium, strontium, barium, radium, copper, nickel, and zinc will be investigated. Micas will be characterized using X-ray powder diffraction, infrared absorption spectroscopy, differential thermal analysis, and scanning electron microscopy. In terms of the broader impacts, the studies may lead to applications in metal recovery, catalysis, and wastewater treatment. Because micas are stable structures, they are candidates for use in remediation of sites contaminated by radioactive species. The educational component will involve the normal mentorin

摘要提案标题：高容量膨胀云母阳离子分离方案编号：CTS-0242285主要研究者：Sridhar Komarneni机构： 宾夕法尼亚州立大学提出的研究目标是合成和表征新型云母用作阳离子交换材料。 在以前的工作中，云母与四面体和八面体负电荷合成。 预计电荷的位置对离子的容量和选择性有影响。 在本工作中，基本的阳离子交换和平衡的钠基云母交换与四面体和八面体负电荷将进行调查。 将研究涉及铯、锶、钡、镭、铜、镍和锌等离子的交换动力学和平衡。 云母将采用X射线粉末衍射、红外吸收光谱、差热分析和扫描电子显微镜进行表征。 就更广泛的影响而言，这些研究可能会导致金属回收，催化和废水处理的应用。 由于云母是稳定的结构，它们是用于修复受放射性物质污染的场地的候选物。 教育部分将包括正常的指导