Biogeochemical and mineralogical processes in redox dynamic groundwater systems
氧化还原动态地下水系统中的生物地球化学和矿物学过程
基本信息
- 批准号:RGPIN-2014-06589
- 负责人:
- 金额:$ 2.11万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2017
- 资助国家:加拿大
- 起止时间:2017-01-01 至 2018-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
INTRODUCTIONBiogeochemical redox processes are a principal control on the mobility of major and trace elements groundwater systems. These processes influence mineral stability and formation, and the chemical speciation and reactivity of redox sensitive elements. As a result, biogeochemical redox processes may promote mobilization or attenuation of major and trace elements in soils, sediments, and aquifers. Redox transitions that result from natural processes or anthropogenic activities can therefore have profound impacts on groundwater quality. Predicting and managing groundwater quality remains a significant challenge, as these impacts are often non-intuitive or poorly understood.OBJECTIVESEnhancing capacity to predict and manage groundwater requires a comprehensive understanding of biogeochemical and mineralogical processes and their impact on the subsurface mobility of major and trace elements. The overall objective of the proposed research program are therefore to advance understanding of biogeochemical and mineralogical processes and their impact on element mobility in redox dynamic groundwater systems. This objective will be pursued through a series experiments aimed at elucidating controls on the mobility of potentially toxic metal(loid)s in the shallow subsurface. More specifically, these experiments will examine biogeochemical and mineralogical controls on metal(loid) mobility under sulfate-reducing conditions. This research will be conducted under two principal research themes: (i) metal(loid) repartitioning during transformation of iron (hydr)oxides; and (ii) metal(loid) attenuation by biogenic zinc sulfides. METHODSThe proposed research program will integrate a series of laboratory experiments to elucidate controls on arsenic, selenium, molybdenum, and antimony under sulfate-reducing conditions. These elements can occur at elevated concentrations in circumneutral pH groundwater impacted by metal, uranium, diamond, and oil sands mining activities. Arsenic and selenium remain significant global water quality issues, whereas concern over antimony and molybdenum in mining environments is increasing worldwide. Additionally, sulfate-reducing conditions are common to groundwater systems impacted by mining and mineral processing. Advective flow experiments will examine relationships between sulfate reduction rates and metal(loid) attenuation during iron (hydr)oxide transformations and biogenic zinc sulfide precipitation. Additionally, experiments will assess the stability of secondary minerals and attenuated metal(loid)s under transient redox conditions. Understanding these multifaceted associations is critical for predicting long-term impacts of biogeochemical redox processes on groundwater quality.IMPACTSeveral graduate and undergraduate students will receive advanced training through the proposed research program. These students will acquire knowledge and develop skills that will allow them to secure meaningful employment and become future leaders in their field. Results of the proposed research program are expected to inform ongoing development of strategies for the remediation and management of soils, sediments and aquifers impacted by mining, mineral processing, and other economic activities. Improving capacity to predict and manage groundwater quality is essential for reducing the impact of these activities on groundwater quality, ecosystem function, and human health.
生物地球化学氧化还原过程是控制主量元素和微量元素地下水系统流动性的主要因素。这些过程影响矿物的稳定性和形成,以及氧化还原敏感元素的化学形态和反应活性。因此,生物地球化学氧化还原过程可以促进土壤、沉积物和含水层中主要和微量元素的活化或衰减。因此,自然过程或人为活动引起的氧化还原转变可能对地下水质量产生深远影响。预测和管理地下水水质仍然是一个巨大的挑战,因为这些影响往往是非直观的或被很好地理解。目的提高预测和管理地下水的能力需要全面了解生物地球化学和矿物学过程及其对常量和微量元素地下移动性的影响。因此,拟议研究计划的总体目标是促进对生物地球化学和矿物学过程及其对氧化还原动态地下水系统中元素移动性的影响的了解。这一目标将通过一系列实验来实现,旨在阐明对潜在有毒金属(Loid)S在浅层地下活动的控制。更具体地说,这些实验将检查硫酸盐还原条件下对金属(Loid)流动性的生物地球化学和矿物学控制。这项研究将在两个主要研究主题下进行:(I)铁(氢)氧化物转化过程中金属(Loid)的再分配;(Ii)生物硫化锌对金属(Loid)的衰减。方法拟议的研究计划将结合一系列实验室实验,阐明硫酸盐还原条件下砷、硒、钼和锑的控制。这些元素在受金属、铀、钻石和油砂开采活动影响的pH值较高的地下水中浓度较高。砷和硒仍然是严重的全球水质问题,而对采矿环境中的锑和钼的担忧在世界范围内日益加剧。此外,硫酸盐还原条件对于受采矿和选矿影响的地下水系统是常见的。平流流动实验将研究铁(氢)氧化物转化和生物硫化锌沉淀过程中硫酸盐还原速率和金属(Loid)衰减之间的关系。此外,实验将评估次生矿物和衰减金属(LOID)S在瞬时氧化还原条件下的稳定性。了解这些多方面的联系对于预测生物地球化学氧化还原过程对地下水质量的长期影响至关重要。几名研究生和本科生将通过拟议的研究计划接受高级培训。这些学生将获得知识和技能,使他们能够获得有意义的工作,并成为各自领域的未来领导者。预计拟议研究方案的结果将为正在制定的受采矿、选矿和其他经济活动影响的土壤、沉积物和含水层的修复和管理战略提供信息。提高预测和管理地下水质量的能力对于减少这些活动对地下水质量、生态系统功能和人类健康的影响至关重要。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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{{ truncateString('Lindsay, Matthew', 18)}}的其他基金
Metal-mineral interactions in dynamic redox environments
动态氧化还原环境中的金属-矿物相互作用
- 批准号:
RGPIN-2020-05172 - 财政年份:2022
- 资助金额:
$ 2.11万 - 项目类别:
Discovery Grants Program - Individual
Metal-mineral interactions in dynamic redox environments
动态氧化还原环境中的金属-矿物相互作用
- 批准号:
RGPIN-2020-05172 - 财政年份:2021
- 资助金额:
$ 2.11万 - 项目类别:
Discovery Grants Program - Individual
NSERC / Syncrude Industrial Research Chair in Mine Closure Geochemistry
NSERC / Syncrude 矿山关闭地球化学工业研究主席
- 批准号:
463568-2018 - 财政年份:2021
- 资助金额:
$ 2.11万 - 项目类别:
Industrial Research Chairs
Metal-mineral interactions in dynamic redox environments
动态氧化还原环境中的金属-矿物相互作用
- 批准号:
RGPIN-2020-05172 - 财政年份:2020
- 资助金额:
$ 2.11万 - 项目类别:
Discovery Grants Program - Individual
NSERC / Syncrude Industrial Research Chair in Mine Closure Geochemistry
NSERC / Syncrude 矿山关闭地球化学工业研究主席
- 批准号:
463568-2018 - 财政年份:2020
- 资助金额:
$ 2.11万 - 项目类别:
Industrial Research Chairs
Biogeochemical and mineralogical processes in redox dynamic groundwater systems
氧化还原动态地下水系统中的生物地球化学和矿物学过程
- 批准号:
RGPIN-2014-06589 - 财政年份:2019
- 资助金额:
$ 2.11万 - 项目类别:
Discovery Grants Program - Individual
NSERC / Syncrude Industrial Research Chair in Mine Closure Geochemistry
NSERC / Syncrude 矿山关闭地球化学工业研究主席
- 批准号:
463568-2018 - 财政年份:2019
- 资助金额:
$ 2.11万 - 项目类别:
Industrial Research Chairs
NSERC Industrial Research Chair in Mine Closure Geochemistry
NSERC 矿山关闭地球化学工业研究主席
- 批准号:
463568-2013 - 财政年份:2018
- 资助金额:
$ 2.11万 - 项目类别:
Industrial Research Chairs
Biogeochemical and mineralogical processes in redox dynamic groundwater systems
氧化还原动态地下水系统中的生物地球化学和矿物学过程
- 批准号:
RGPIN-2014-06589 - 财政年份:2018
- 资助金额:
$ 2.11万 - 项目类别:
Discovery Grants Program - Individual
Examining controls on mass loading to an oil sands end pit lake
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476388-2014 - 财政年份:2017
- 资助金额:
$ 2.11万 - 项目类别:
Collaborative Research and Development Grants
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