Acquisition of a High-Speed Centrifuge to Study the Stability and Surface Chemistry of Allophane and Imogolite

铝硅酸盐矿物相allophane和imogolite作为微小颗粒存在于土壤中，对土壤中养分和污染物的运动、森林生产力和土壤的反应以及道路和建筑物建设具有重要影响。这些矿物具有高度的表面活性，并且相对于土壤中的结晶粘土也是亚稳的。了解它们的表面性质和反应性对于理解土壤演化和地表地质过程至关重要。该提案要求50%的人支持购置一台高速离心机，用于从土壤样品中分离铁矾和伊莫戈尔石，以测量其化学和物理性质。离心机将被安置在华盛顿州立大学农学和土壤系。

The aluminosilicate mineral phases allophane and imogolite occur as tiny particles in soils and have important effects on the movement of nutrients and pollutants in soil, on forest productivity and on the response of soils and during road and building construction. These minerals are highly surface-active and are also metastable relative to the crystalline clays in soils. A knowledge of their surface properties and their reactivity is essential to understanding soil evolution and surface geological processes. This proposal requests 50% support for the acquisition of a high-speed centrifuge that is needed to separate allophane and imogolite from soil samples in order to measure their chemical and physical properties. The centrifuge is to be housed in the Department of Agronomy and Soils at Washington State University.