Bioaccessibility, bioavailability and mineralogy of soil metal contaminants for application to site specific risk assessment

土壤金属污染物的生物可及性、生物利用度和矿物学，用于特定地点风险评估

• 批准号: 437221-2012
• 负责人: Hale, Beverley
• 金额: $ 6.95万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=553103
• 关键词: Bioaccessibility; bioavailability; mineralogy; soil; metal

Metal contaminants in soil can pose a risk to human health through exposure via ingestion or inhalation of soil particles and absorption of the contaminant by the gut or lung. Regulations governing the cleanup of contaminated sites mostly calculate the potential dose by measuring the total concentration of metal in these particles, even though the harsh acid extraction used to determine total metal concentrations is not similar to the gut or lung environment. There are a number of methods to determine what the true exposure might be, including simulating gastric juices and measuring release of the metal into solution, and feeding the contaminated soils to animals and measuring elimination of the contaminant. The proposed work will combine these two techniques to better understand the controllers of Ni release from soils after ingestion. This new knowledge will lead to tools that enable industry and regulators to make cost-effective and scientifically informed decisions for the fate of contaminated lands that protect human and environmental health with a known and acceptable margin of safety.

土壤中的金属污染物可通过摄入或吸入土壤颗粒以及肠道或肺部吸收污染物而对人类健康构成风险。 管理污染场地清理的法规主要通过测量这些颗粒中金属的总浓度来计算潜在剂量，即使用于确定总金属浓度的苛刻酸提取与肠道或肺部环境不同。 有许多方法可以确定真正的暴露量，包括模拟胃液和测量金属释放到溶液中，以及将受污染的土壤喂给动物并测量污染物的消除。 拟议的工作将联合收割机这两种技术，以更好地了解控制器的镍释放后，摄入土壤。 这一新知识将产生工具，使工业界和监管机构能够对受污染土地的命运作出具有成本效益和科学依据的决定，以已知和可接受的安全限度保护人类和环境健康。