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TiO2 as a cost effective uranium getter for uranium contaminated sites

TiO2 作为一种具有成本效益的铀吸气剂，适用于铀污染场地

基本信息

批准号：
356983-2007
负责人：
Wang, Feiyue
金额：
$ 7.28万
依托单位：
University of Manitoba
依托单位国家：
加拿大
项目类别：
Strategic Projects Supplemental Competition
财政年份：
2008
资助国家：
加拿大
起止时间：
2008-01-01 至 2009-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=403163
关键词：
TiO2 cost effective uranium getter

项目摘要

Nuclear energy provides one of few promising, cleaner alternatives to fossil fuel, and is expected to grow rapidly due to the increasing demand of energy and the growing concern over the impact of fossil fuel on climate change. As the largest producer and exporter of uranium in the world, Canada will play a major role in the development. Although technological developments have reduced construction costs and improved nuclear power plant safety, there is increasing concern over the environmental and human health impact related to uranium mine tailings and disposal concepts (e.g., geological repositories). Based on the strong association of uranium with anatase in natural uraniferous systems, here we propose to use titanium oxide (TiO2) as a novel, cost-effective uranium getter for uranium mine tailing sites, contaminated aquifers, and high-level nuclear waste containers. By conducting field and laboratory experiments and quantum chemistry calculations, we will investigate the mechanisms and optimal conditions for the uranium removal by TiO2. The technique will then be validated at uranium-contaminated sites. This is a timely research that will contribute significantly to the uranium economy in Canada, to the protection of the environment, and to the improvement of public confidence in the entire uranium fuel cycle.

核能是化石燃料的少数有前途、更清洁的替代品之一，由于能源需求的不断增加以及人们对化石燃料对气候变化影响的日益关注，预计核能将迅速增长。作为世界上最大的铀生产国和出口国，加拿大将在发展中发挥重要作用。尽管技术发展降低了建设成本并提高了核电站的安全性，但人们越来越关注与铀矿尾矿和处置概念（例如地质处置库）相关的环境和人类健康影响。基于天然含铀系统中铀与锐钛矿的强烈结合，我们建议使用二氧化钛（TiO2）作为一种新型、经济高效的铀吸气剂，用于铀矿尾矿场、受污染的含水层和高放核废料容器。通过现场和实验室实验以及量子化学计算，我们将研究TiO2除铀的机理和最佳条件。该技术随后将在铀污染场地得到验证。这是一项及时的研究，将为加拿大的铀经济、环境保护以及提高公众对整个铀燃料循环的信心做出重大贡献。