Environmental mobility of arsenic and antimony

砷和锑的环境迁移性

• 批准号: 137979-2006
• 负责人: Jamieson, Heather
• 金额: $ 1.62万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 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=391393
• 关键词: Environmental; mobility; arsenic; antimony

Objectives: This research will clarify the factors that control whether arsenic and antimony are stabilized in mine tailings, soils and sediments or whether they are leached to natural waters, or transformed into a bioavailable form (a form that can enter the bloodstream of an organism). Nature of Work: My research involves field sampling and detailed characterization of the contaminated materials to determine the chemical form of the arsenic and antimony, and understand its transformation under changing environmental conditions. I will build on the success of the synchrotron-based microanalysis that we have recently developed. The fieldwork is based at abandoned gold mines in Yellowknife and Nova Scotia.   Why This is Important: This research is important since soluble forms of these toxic elements are more available for uptake by organisms such as fish or humans. Arsenic is a highly toxic element whose environmental behaviour is still not completely understood. This project will address the research gaps in our understanding of antimony speciation, an element whose toxicity and mobility are receiving increased attention. This research will help the mining industry improve remediation design, and help regulators conduct risk assessment. The Yellowknife community is very interested in the form of arsenic in regional soil. In Nova Scotia, where people are exposed to arsenic-rich tailings dust during recreational activities, a federal-provincial committee has expressed an urgent need to determine how the arsenic is bound. Anticipated Outcomes:  Four MSc and two PhD theses are expected to result. Based on previous experience, each MSc will produce two journal publications and each PhD produce three or four. Benefits: This research will enhance our understanding of ecological and human health risk associated with arsenic and antimony.  Our new synchrotron methods will be suitable for industrial application at the Canadian Light Source. The results will help solve a large environmental problem in the Canadian North, namely arsenic in the Yellowknife area, and address an emerging one in Nova Scotia.

目的：这项研究将阐明控制砷和锑是否稳定在尾矿、土壤和沉积物中的因素，或者它们是否被沥滤到自然沃茨中，或者转化为生物可利用的形式（一种可以进入生物体血液的形式）。工作性质：我的研究涉及现场采样和污染材料的详细表征，以确定砷和锑的化学形式，并了解其在不断变化的环境条件下的转化。我将在我们最近开发的基于同步加速器的微量分析的成功基础上再接再厉。实地工作是在耶洛奈夫和新斯科舍省的废弃金矿进行的。 为什么这很重要：这项研究很重要，因为这些有毒元素的可溶形式更容易被鱼类或人类等生物体吸收。砷是一种剧毒元素，其环境行为尚未完全了解。该项目将解决我们对锑形态的理解中的研究空白，锑是一种毒性和流动性越来越受到关注的元素。这项研究将有助于采矿业改善修复设计，并帮助监管机构进行风险评估。耶洛奈夫社区对区域土壤中砷的形式非常感兴趣。在新斯科舍省，人们在娱乐活动中接触到富含砷的尾矿粉尘，一个联邦-省委员会表示迫切需要确定砷是如何结合的。预期成果：预计将产生四篇硕士和两篇博士论文。根据以往的经验，每个硕士将产生两个期刊出版物，每个博士产生三个或四个。优点：这项研究将提高我们对砷和锑的生态和人类健康风险的认识。我们新的同步加速器方法将适合在加拿大光源的工业应用。研究结果将有助于解决加拿大北部的一个大的环境问题，即耶洛奈夫地区的砷问题，并解决新斯科舍省正在出现的一个问题。