Acquisition of a Kinetic Phosphorescence Analyzer for Uranium-focused Research and Education

采购用于铀研究和教育的动力学磷光分析仪

• 批准号: 0742597
• 负责人: Rajesh Sani
• 金额: $ 4.88万
• 依托单位: South Dakota School of Mines and Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-10-01 至 2009-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0742597&HistoricalAwards=false
• 关键词: Acquisition; Kinetic; Phosphorescence; Analyzer; Uranium

0742597SaniThis proposal seeks funding to purchase a kinetic phosphorescence analyzer (KPA) for high precision, high sensitivity uranium (VI) analysis. The unit will be used for a wide range of geoscience and environmental science applications. The requested unit from Chemchek Instruments allows uranium measurement in water, environmental samples, industrial solutions and for bioassay. In addition, the unit can measure lanthanides (Dy, Eu, Sm, Tb, and Tm) in solution. Detection limits of 0.01 µg L-1 uranium is possible with the instrument as is speciation determination between U(IV) and U(IV). Uranium contamination is a serious environmental threat impacting groundwater, soils, and sediments. The KPA unit will be instrumental in the following research efforts, 1) understanding the role of dissimilatory metal reducing bacteria in precipitating toxic metals via enzymatic and non-enzymatic processes, 2) understand the fate and transport of nanometer sized uraninite particles in groundwater and vadoze zone, 3) the fate, transport and migration (including aerial) of U compounds associated with historical mining activities, 4) the role of humic substances as electron acceptors and its impact on dissimilatory U reduction, and 5) U complexes in aerosol particles and their changes during atmospheric transport. Sani will administer the instrument and provide training. Sani will also provide radiation safety training. Lab space is already available. Project funds will support consumables. Students will be exposed to environmental issues related to heavy metal and radionuclide contamination. Research results will be disseminated via publications and through presentations at meetings.***

0742597 Sani本提案寻求资金，以购买一台动力学磷光分析仪（KPA），用于高精度、高灵敏度的铀（VI）分析。该装置将用于广泛的地球科学和环境科学应用。Chemchek仪器公司提供的设备可用于水、环境样品、工业溶液和生物测定中的铀测量。此外，该装置还可以测量溶液中的镧系元素（Dy、Eu、Sm、Tb和Tm）。该仪器的铀检测限可达0.01 µg L-1，也可用于U（IV）和U（IV）之间的形态测定。铀污染是影响地下水、土壤和沉积物的严重环境威胁。KPA单元将有助于以下研究工作：1）了解异化金属还原菌在通过酶和非酶过程沉淀有毒金属中的作用，2）了解纳米级晶质铀矿颗粒在地下水和包气带中的归宿和迁移，3）（4）腐殖物质作为电子受体的作用及其对异化铀还原的影响;（5）气溶胶颗粒中的铀络合物及其在大气传输过程中的变化。Sani将管理仪器并提供培训。Sani还将提供辐射安全培训。实验室空间已经可用。项目资金将用于支持消耗品。学生将接触到与重金属和放射性核素污染有关的环境问题。研究结果将通过出版物和在会议上的发言加以传播。