Contaminant Transport Processes Between Water and Sediment Beds in Rivers

这是一个支持有毒物质运输研究的奖项。 流动的、涉及交换的天然沃茨中的污染物 水流与河流沉积物之间的作用 其充当污染物的存储位置。 的 研究涉及的基本调查 利用吸附无机污染物的流化床交换 利用一个五米长的循环实验室 有细砂床的水槽。 吸附无机示踪剂 计划使用包括二价钙和三价钙 铝和铬阳离子。 调查人员计划 使用可吸附阳离子染料示踪剂亚甲蓝， 建立有机物平衡和动力学行为 污染物在批量规模的工作之前， 水槽实验 该项目正在联合 由流体、颗粒和液压系统提供支持 程序和环境工程元素的 环境和海洋系统方案。 水污染物床面贡献关系 从受污染的沉积物到水质， 这些沉积物通过物理接触 影响相对运动的过程 受流体运动扰动的沉积物和颗粒 很好理解。 预计这一结果 研究将有助于制定更好的 比现在存在的水之间的相互作用模型， 受有机污染的运动和沉积物， 污染水的无机污染物，以及 这些模型在环境和水力学中的应用 工程实践

This is an award to support research on transport of toxic contaminants in flowing, natural waters involving exchange processes between the stream-flow and the stream sediments which act as storage locations for the contaminants. The research involves investigation of the fundamentals of stream-bed exchange using adsorbing inorganic contaminants and utilizing a five-meter long recirculating laboratory flume with a fine sand bed. Adsorbing inorganic tracers planned for use include bivalent calcium and trivalent aluminum and chromium cations. The investigators plan on using the adsorbable cationic dye tracer methylene blue to establish equilibrium and kinetic behavior of organic contaminants in batch-scale work before proceeding to flume experiments. This project is being jointly supported by the Fluid, Particulate and Hydraulic Systems Program and the Environmental Engineering element of the Environmental and Ocean Systems Program. The relationship of bed-contribution of water pollutants from contaminated sediments to water quality with which those sediments are placed into contact by physical processes influencing the relative motion between sediments and particles disturbed by fluid motion are not well understood. It is expected that results of this research will contribute toward formulation of better models than now exist of interactions between water in motion and sediments contaminated with organic and inorganic pollutants that contaminate the water, and application of those models in environmental and hydraulic engineering practice.