SUBSURFACE TRANSPORT AND FATE OF CADMIUM, ARSENIC AND LEAD

该项目的目的是评估地下水的重要性， 物理和化学异质性对金属迁移的影响 地质复杂的材料。 该项目将包括（1） 矿物学和化学取样及土壤、沉积物分析， 从北方的一个或多个EPA超级基金站点获得的地下水 新英格兰，其中As、Cd、Ni和/或Pb等于或高于EPA行动- 水力输运特性的实验室和现场测试 选定现场的松散矿床;（3） 野外和实验室数据的地质统计学分析;以及（4） 非反应性和非反应性物质的形态和迁移的数值模拟 非均质地质材料中的活性组分。 这 研究将允许更好地预测地下运输， 在对人类有毒的浓度下的金属的命运。

The objective of this project is to evaluate the importance of subsurface physical and chemical heterogeneity on the transport of metals in geologically complex materials. The project will include (1) mineralogical and chemical sampling and analyses of soils, sediment, and ground-water obtained from one or more EPA superfund sites in northern New England at which As, Cd, Ni, and/or Pb are at or above EPA action- level; (2) laboratory and field testing of hydraulic transport properties of unconsolidated deposits at the chosen field site(s); (3) geostatistical analyses of the field and laboratory data; and (4) numerical simulation of the speciation and transport of nonreactive and reactive constituents in heterogeneous geological materials. This research will allow for better prediction of the subsurface transport and fate of metals at concentrations toxic to humans.