Project 8: Characterization of Wind Blown Dust from Tailings and other Mining

项目 8：尾矿和其他采矿业风吹粉尘的表征

• 批准号: 8378314
• 负责人: Eric A Betterton
• 金额: $ 28.62万
• 依托单位: UNIVERSITY OF ARIZONA
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/8378314
• 关键词: Address; Aerosols; Agreement; Altitude; Alveolar; Archives; Arizona; Arsenic; Breathing; Cadmium; Caliber; Characteristics; Chemicals; Child; Chromium; Climate; Collaborations; Computer Simulation; Consent; Data; Deposition; Development; Dust; Elements; Environment; Environmental Wind; Event; Exposure to; Funding; Generations; Hazardous Waste; Health; Indium; Ingestion; International; Iron; Laboratories; Lead; Letters; Link; Location; Lung; Measurement; Measures; Mechanics; Metals; Mining; Modeling; Particulate Matter; Phase; Population; Population Growth; Positioning Attribute; Radioisotopes; Resolution; Risk; Risk Assessment; Role; Route; Safety; Sampling; Scanning; Science; Sea; Services; Site; Soil; Source; Study models; Surface; Tail; Trace metal; Ultrafine; United States National Aeronautics and Space Administration; Universities; Water; Weather; Work; attenuation; climate change; contaminant transport; exposed human population; improved; interest; model development; operation; particle; planetary Atmosphere; remediation; skills; superfund site; tool; toxic metal; ultrafine particle; wasting

Atmospheric dust originating from mine tailings and other mining operations is a potentially important human exposure route for arsenic, lead and other toxic elements in the arid Southwest, and will become increasingly important here and elsewhere with predicted regional climate change and population growth. Dust particles emitted from mining operations mobilize trace metals which can then accumulate in soils, natural waters, and vegetation. Human exposure to the dust can occur through inhalation and, especially in the case of children, incidental dust ingestion. This project will use Micro-Orifice Uniform Deposit Impactor samplers to collect atmospheric aerosols in ten size fractions (0.056 microM to 18 microM aerodynamic diameter), downwind of two Superfund sites - contaminated mine tailings at Hayden-Winkleman and Iron King, AZ. The separate fractions will yield size-fractionated mass concentration data for toxic metals and metalloids (As, Pb, Cr, Cd, Sb), as well as other physicochemical characteristics. A scanning mobility particle sizer (SMPS) will allow us to count the number of ultrafine particles, which are thought to be most closely linked to adverse health effects. Using these tools, the following Aims will be addressed: 1) assess the role of atmospheric dust in the transport of metals contaminants from mine operations 2) identify contaminant source to assess remediation approaches 3) in collaboration with Project 9 assess role of vegetation cover to reduce dust emission 4) incorporate results into University of Arizona - Dust Regional Atmosphere Model for prediction of dust emissions and human exposures These studies will be performed in collaboration with Region 9 EPA and the State of Arizona Department of Environmental Quality. The results of these studies will be critical additions to the information that these agencies utilize for risk assessment of down-wind exposed populations.

来自矿山尾矿和其他采矿作业的大气灰尘是西南干旱的砷，铅和其他有毒元素的潜在重要人类暴露途径，并且随着预测的区域气候变化和人口增长，这里和其他地方将变得越来越重要。采矿作业发出的尘埃颗粒动员痕量金属，然后可以在土壤，天然水和植被中积聚。人类可能会通过吸入，尤其是在儿童偶然摄入灰尘而发生的灰尘。该项目将使用微孔统一的沉积物冲击器采样器来收集十个大小分数（0.056 microm至18 microm空气动力学直径）的大气气溶胶，这是两个超级基金地点的顺风 - 在Hayden-Winkleman和Iron King，AZ，AZ，AZ。单独的馏分将产生有毒金属和金属（AS，PB，CR，CD，CD，SB）以及其他理化特征的尺寸分级的质量浓度数据。扫描迁移率粒子sizer（SMP）将使我们能够计算超细颗粒的数量，这些颗粒的数量与不良健康效应最紧密相关。使用这些工具，将解决以下目标： 1）评估大气灰尘在矿山操作中污染物污染物中的运输中的作用 2）确定污染物来评估补救方法 3）与项目9合作评估植被覆盖的作用以减少灰尘排放 4）将结果纳入亚利桑那大学 - 尘埃区域氛围模型，用于预测灰尘排放和人类暴露 这些研究将与第9区EPA和亚利桑那州环境质量部合作进行。这些研究的结果将是这些机构用于对下暴露人群的风险评估的信息的关键补充。