Bioavailability and Molecular Structure of Organic Carbon in Bentonite

膨润土中有机碳的生物利用度和分子结构

基本信息

批准号：
530808-2018
负责人：
Simpson, Myrna
金额：
$ 5.34万
依托单位：
University of Toronto
依托单位国家：
加拿大
项目类别：
Collaborative Research and Development Grants
财政年份：
2019
资助国家：
加拿大
起止时间：
2019-01-01 至 2020-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=691687
关键词：
Bioavailability Molecular Structure Organic Carbon

项目摘要

The Canadian Nuclear Waste Management Organization (NWMO) is tasked with developing a plan for the long-term storage of Canada's used nuclear fuel. This includes the development of an engineered barrier system for the storage of used fuel bundles that consists of used fuel containers packed in bentonite clay within a deep geologic repository (DGR) 500m below ground. Bentonite clay has a high affinity to swell and to retain any radionucleotides that may leak. Bentonite clay also contains natural organic matter which may support microbial activity in a DGR and result in corrosion of the used fuel containers. Therefore, a detailed investigation of natural organic matter chemistry and bioavailability is needed. The proposed research between the NWMO and University of Toronto researchers will investigate how organic matter in bentonite may be altered with: compaction, temperature, salinity, radiation, and how heterogeneous organic matter in bentonite may be. Highly sophisticated analytical tools will be used to assess how organic matter chemistry may be altered through these simulated DGR conditions. This information will be used to inform and further develop the long-term plan for Canada's nuclear waste storage. A long-term and sustainable plan for Canada's used nuclear fuel will ensure the safe disposal of this waste and provide a direct benefit to all Canadians.

加拿大核废料管理组织（NWMO）的任务是制定一项长期存储加拿大二手核燃料的计划。这包括开发一种工程屏障系统，用于存储用过的燃油束，该系统由堆积在深层地质储存库（DGR）500m下方500m的膨润土粘土中的二手燃料容器组成。膨润土粘土具有较高的亲和力，可膨胀并保留任何可能泄漏的放射性核苷酸。膨润土粘土还包含天然有机物，可以支持DGR中的微生物活性，并导致使用的燃料容器腐蚀。因此，需要对自然有机物化学和生物利用度进行详细研究。 NWMO和多伦多大学研究人员之间的拟议研究将研究膨润土中的有机物：压实，温度，盐度，辐射以及膨润土中异质的有机物如何可能改变。高度复杂的分析工具将用于评估如何通过这些模拟DGR条件改变有机物化学。该信息将用于告知和进一步制定加拿大核废料储存的长期计划。对加拿大二手核燃料的长期和可持续计划将确保安全处理这种废物，并为所有加拿大人提供直接利益。