Pollutant Exchange Processes at Active Water-Sediment Interfaces

9421491小溪这是一个支持研究的奖项，其目的是了解基本的物理和化学过程，这些过程控制着流动水流的冲积沉积物中的物质与受沉积床形态(如涟漪和沙丘)影响的水的交换。这项研究采取的基本方法是在循环实验室水槽中进行实验，条件是非常仔细地控制流动、水质、床介质和在床-流体界面上溶解或以颗粒形式交换的物质的性质。这是之前在美国国家科学基金会第91-05965号补助金下进行的研究的更新。这一研究成果可用于回答水体底泥物质对上覆水质的污染效应等重要问题。这一知识很可能被应用于环境工程实践，以确定去除沉积物中潜在水污染物和污染物的方法，并确定废水处理厂的选址，以最大限度地减少其污水排放对环境质量的不良影响，以及剩余污泥的管理做法。***

9421491 Brooks This is an award to support research, the objective of which is to obtain an understanding of the fundamental physical and chemical processes that control the interchange of substances in alluvial sediments of flowing water streams with the water as affected by the sediment bed forms such as ripples and dunes. The basic approach being taken in this research is the conduct of experiments in recirculating laboratory flumes under very carefully controlled conditions of flow, water quality, the bed media and the nature of the substances dissolved or in particulate form being exchanged at the bed-fluid interface. This is a renewal of research previously conducted under NSF Grant No. 91-05965. Results of this research may be applied to answering important questions relating to the pollutional effects that substances in bottom sediments of water bodies have on the overlying water quality. This knowledge is likely to be applied in environmental engineering practice to determine approaches to removal of potential water pollutants and contaminants from sediments and in determining locations for wastewater treatment plants that would minimize the undesirable effects on environmental quality of their effluent discharges and management practices for residual sludges. ***