Passive uranium remediation at Cluff Lake, Saskatchewan

萨斯喀彻温省克拉夫湖的被动铀修复

• 批准号: 511159-2017
• 负责人: Konhauser, Kurt
• 金额: $ 1.82万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 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: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=640719
• 关键词: Passive; uranium; remediation; Cluff; Lake

AREVA Resources Canada, headquartered in Saskatoon, SK, has been operating in Canada for over 50 years. For over 20 years AREVA and their predecessor companies operated the Cluff Lake uranium mine, located in northwestern Saskatchewan. Following closure of the mine in 2002, physical decommissioning activities at Cluff Lake were completed between 2004 and 2006. Large areas were re-sloped, while underground mines and the open-pit excavations were either backfilled or allowed to flood with groundwater and surface water. At present, the flooded pits contain elevated levels of metals including uranium (U), nickel (Ni) and arsenic (As),which are sourced from surrounding waste rock, bedrock, groundwater, and surface runoff. The objectives of this study are to: (1) identify the sources of aqueous trace metals which are in excess of provincial and federal guidelines, with a focus on U, Ni and As; (2) understand U cycling in two flooded mine pits of different ages at the Cluff Lake site, and to quantify the benefits of the passive remediation option and identify any long term uncertainties in the passive remediation approach; and (3) gather data to assess if the passive remediation approach could be enhanced through active intervention, such as biostimulation, to facilitate aqueous metalsequestration in the cold climatic region in which the mine site is located.

总部位于SK萨斯卡通的加拿大Areva Resources加拿大已经在加拿大运营了50多年。 20多年来，Areva及其前身公司经营着位于萨斯喀彻温省西北部的Cluff Lake铀矿。 2002年矿山关闭后，在2004年至2006年之间，在克拉夫湖（Cluff Lake）完成了物理退役活动。大面积被重新倾斜，而地下矿山和开放坑的挖掘是回现在填充，或者允许在地下水和地表水中泛滥。目前，被水坑含有铀（U），镍（Ni）和砷（AS）等金属水平升高，这些金属来自周围的废岩，基岩，地下水和地表径流。这项研究的目标是：（1）确定超过省和联邦准则的水性痕量金属的来源，重点是U，NI和AS； （2）了解在克拉夫湖（Cluff Lake）遗址的两个洪水坑中骑自行车，并量化被动补救选择的好处，并确定被动补救方法中的任何长期不确定性； （3）收集数据以评估是否可以通过主动干预（例如生物刺激）来增强被动补救方法，以促进矿场所在的冷气候区域中的水性金属延伸。