Sorption of palladium(II) on biotite, quartz and feldspar in brackish groundwater by batch experiment, sorption model and DFT calculation

间歇实验、吸附模型和DFT计算微咸地下水中黑云母、石英和长石对钯(II)的吸附

• 批准号: 561141-2020
• 负责人: Nagasaki, ShinyaS
• 金额: $ 7.21万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=752901
• 关键词: Sorption; palladium; II; biotite; quartz

Internationally, agencies such as the NWMO (Nuclear Waste Management Organization) are considering underground deep geological repositories in either crystalline or sedimentary rock formations as a safe and long-term solution to the disposal of used nuclear fuel. These agencies will have to prepare a safety assessment to demonstrate that used nuclear fuel will be safely managed over hundreds of thousands of years. The reliability of the safety assessment will be improved if the sorption behaviours of radionuclides in the engineered and natural barriers of the repository are well characterized. In Canada, the NWMO is engaging with two potential siting areas, one in granitic rock and one in sedimentary rock. In this project, the sorption of Pd(II) on biotite, quartz and feldspar will be studied. (Pd-107 is a long-lived fission product present in used nuclear fuel in appreciable amounts. Quartz and feldspar are main mineral components of granite. Biotite is a common but minor mineral component of granite and is considered to dominate the sorption of some radionuclides such as Cs on granite.) The sorption reactions will be identified by integrating the experiments with a sorption model and with quantum chemistry calculations, and the optimized equilibrium constants of reactions will be evaluated. Qualified sorption data will be compiled in the sorption database of the NWMO. This study will lead to long-term benefits to Canadian society, as it will allow for increased confidence that a safe site has been selected (ensuring future health and wellbeing of Canadians and the environment). This project will use the unique research capability and expertise at McMaster University for working with trace radionuclides and extend our scientific understanding of sorption processes of one of the nuclides in safety assessment. Importantly, this will also contribute to the development of highly qualified personnel in the fields of used nuclear fuel management.

在国际上，NWMO（核废料管理组织）等机构正在考虑在地下地质地质储藏库中，无论是结晶岩层还是沉积岩层，是用于处置二手核燃料的安全且长期的解决方案。这些机构将不得不准备安全评估，以证明将使用数十万年的核燃料安全管理。如果储存库的工程和自然障碍中放射性核素的吸附行为得到很好的特征，则将提高安全评估的可靠性。 在加拿大，NWMO正在参与两个潜在的选址区域，一个在花岗岩岩石中，一个在沉积岩中。在这个项目中，将研究对Biotite，Quartz和Feldspar上的PD（II）吸附。 （PD-107是一种长寿命的裂变产物，以可观的数量存在于使用的核燃料中。石英和长石是花岗岩的主要矿物成分。Biotite是花岗岩的常见但次要的矿物质成分，被认为在某些放射性核核酸剂量的刺激量中被认为是在颗粒上识别的s or cons and and and s andertim and and and A sotimatim and and and and s sorigation and and and and，并将其整合为颗粒。）将评估优化的反应平衡常数。合格的吸附数据将在NWMO的吸附数据库中编译。这项研究将为加拿大社会带来长期利益，因为这将使人们对已经选择安全地点的信心（确保了加拿大人和环境的未来健康和福祉）。 该项目将使用麦克马斯特大学的独特研究能力和专业知识来使用痕量放射性核素，并扩展我们对安全评估中一种核素之一的吸附过程的科学理解。重要的是，这也将有助于在二手核燃料管理领域的高素质人员的发展。