Transport and Speciation of Metals at Disrupted Sediment-Water Interfaces: Coupled Modeling, Annular Flume, and Field Experiments

环境地球化学和生物地球化学项目BSTRACT9807686Baptista，Farrenkopf PI建议将模拟与沉积物和河口湾最大浑浊带的幕式破坏期间金属的运输和形态的实验室和现场结果联系起来。 这些研究的核心将是使用一个旋转的环形水槽（RALF），PI将使用它来控制在野外收集的孵化沉积物芯的物理状态。 重点将放在Fe、Mn和相关元素的氧化还原循环上。 选择的现场地点是哥伦比亚河口，该地点的物理和地球化学条件适合于测试所提出的假设，并且这些PI具有初步数据和正在进行的研究。 总体而言，这一跨学科研究的结果将显着提高我们的能力，定量预测的运输，命运和生物利用度的元素在河口型systems.This建议的环境地球化学和生物地球化学计划的一部分。 该项目将由海洋科学司、化学和运输系统司以及地球科学司共同资助。 .

.ENVIRONMENTAL GEOCHEMISTRY AND BIOGEOCHEMISTRY PROGRAMABSTRACT9807686Baptista, FarrenkopfThe PIs propose to link modeling with lab and field results on the transport and speciation of metals during episodic disruptions of sediments and in turbidity maxima in estuaries and bays. Central to these studies would be the use of a rotating annular flume (RALF) that the PIs would use to control the physical regime over incubated sediment cores, which had been collected in the field. A major emphasis would be on the redox cycling of Fe, Mn and associated elements. The field site chosen is the Columbia River estuary, a site where the physical and geochemical conditions are suitable to test the proposed hypotheses, and where these PIs have preliminary data and ongoing studies. Overall, the results of this interdisciplinary study would significantly advance our ability to quantitatively predict the transport, fate and bioavailability of elements in estuarine type systems.This proposal was part of the Environmental Geochemistry and Biogeochemistry program. It will be jointly funded by the Division of Ocean Sciences, Division of Chemical and Transport Systems, and the Division of Earth Sciences. .