The Fate of Trace Metals in Freshwater Sediments: An Experimental and Modeling Approach

9309349盖拉德：这是一个支持研究的奖项，其目的是从根本上了解淡水沉积物中痕量金属的去向。研究人员计划使用一种同时涉及对这个问题进行实验和数学建模的方法，评估在自然条件下痕量金属可能永久埋藏在沉积物中或重新流动到上覆水域的程度。实验工作包括测定痕量金属在间隙水和散体沉积物中的分布，以及测定痕量金属与沉积物颗粒和自生颗粒的结合。导致这一奖项的提案是根据NSF 92-122《研究启动奖计划公告和指南》提交的。预计这些结果将提供比目前更基本的理解，了解与湖泊和溪流沉积物中微量金属成分污染上覆水的过程有关的现象。这反过来可以改进对沉积物中痕量金属行为的预测，并有可能作为一种预测工具应用于评估受污染沉积物中金属的释放情况。

9309349 Gaillard This is an award to support research, the objective of which is to gain a fundamental understanding of the fate of trace metals in freshwater sediments. The investigator plans on using an approach that involves both experimental and mathematical modeling of the problem, assessing the extent to which trace metals could be buried permanently in sediments or remobilized into overlying waters under natural conditions. The experimental work involves determination of trace metal distributions in interstitial waters and bulk sediments and on the measurement of trace metal binding to sediment particles and authigenic particles. The proposal leading to this award was submitted in response to NSF 92-122, Research Initiation Awards Program Announcement and Guidelines. Results are expected to provide a more fundamental understanding than now exists of phenomena that are associated with the processes by which trace metal constituents of sediments in lakes and streams can pollute the overlying water. This in turn can lead to an improvement in predicting the behavior of trace metals in sediments and potentially find application as a prognostic tool for assessing the release of metals from polluted sediments.