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Developing new tools for assessing legacy pollutants and their ecological consequences inlakes near NWT mines

开发新工具来评估西北地区矿山附近湖泊的遗留污染物及其生态后果

基本信息

批准号：
462955-2014
负责人：
Blais, Jules
金额：
$ 12.57万
依托单位：
University of Ottawa
依托单位国家：
加拿大
项目类别：
Strategic Projects - Group
财政年份：
2016
资助国家：
加拿大
起止时间：
2016-01-01 至 2017-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=598112
关键词：
Developing new tools assessing legacy

项目摘要

We will develop novel tools, under the rubric of a new field we are defining as paleoecotoxicology, to assess risk from industrial and residential activities near Yellowknife, NWT. The purpose of this research is to generate important information on the extent and fate of environmental contaminants in the Yellowknife area to inform future land and water management decisions. By combining geochemical and biological approaches (using key toxicological indicators archived in lake sediments), our tools will have applicability in many other regions affected by multiple environmental stressors. The objectives of this research include: (1) to characterize and determine the spatial extent of toxic metals and hydrocarbons produced by local mines and other industrial activities, and identify their toxicological effects on nearby lakes using paleoecotoxicological methods; (2) to determine the mobility and bioaccessibility of arsenic species in the vicinity of Yellowknife and differentiate between the toxic arsenic trioxide derived mainly from stack emissions and the naturally occurring arsenopyrite, which is less toxic; and (3) to identify the sources and causes for methyl mercury 'hotspots' focused near some mining operations, which are contributing to elevated methyl mercury in the region. This research will provide important information on the long term stability, toxicity, and bioaccumulation potential of pollutants in local aquatic environments.

我们将开发新的工具，在一个新的领域，我们正在定义为古生态毒理学的标题下，评估西北地区耶洛奈夫附近的工业和住宅活动的风险。这项研究的目的是产生重要的信息，在耶洛奈夫地区的环境污染物的程度和命运，为未来的土地和水管理决策提供信息。通过结合地球化学和生物学方法（使用湖泊沉积物中存档的关键毒理学指标），我们的工具将适用于受多种环境压力影响的许多其他地区。本研究的目标包括：（1）表征和确定当地矿山和其他工业活动产生的有毒金属和碳氢化合物的空间范围，并利用古生态毒理学方法确定其对附近湖泊的毒理学效应;（二）确定耶洛奈夫附近砷物种的流动性和生物可及性，并区分主要来自烟囱的有毒三氧化二砷（3）确定甲基汞“热点”的来源和原因，这些“热点”集中在一些采矿作业附近，导致该地区甲基汞含量升高。这项研究将提供有关污染物在当地水生环境中的长期稳定性、毒性和生物累积潜力的重要信息。