EAGER: Contaminant Transport Behavior in and at the Interface of Fine-Grained Sediments; Visualization, Simulation and Analysis

1523488 PinderTitle：EAGER：细颗粒沉积物界面处的污染物迁移行为;可视化、模拟和分析EPA估计，美国有235，000至355，000个受污染的地下水站点需要修复。每个修复地点的年度运行和维护费用估计在610 000美元至770 000美元之间。众所周知，污染物在细粒沉积物中的行为不同，可能导致作为饮用水源的地下水长期污染。然而，尽管这种高度的关注，很少有人知道的行为，污染物驻留在这些细粒地层。因此，彻底了解细粒地层中污染物行为的基本物理化学机制至关重要。由此产生的分析将阐明的机制，治理长期的拖尾现象中观察到的污染地下水网站。这种污染物尾矿在财政上对工业产生影响，不仅因为直接成本，而且因为他们需要持有资金储备，以确保对现场补救的长期财政支持。公众、政府和工业界寻求加速地下水污染的清理，这项研究旨在帮助满足这一需求。最后，该提案直接寻求增加工程领域的妇女人数。工程研究所是佛蒙特州州长研究所的四个STEM组成部分之一。本提案中提出的解决关键环境需求的实验研究、建模和分析相结合将产生以下预期成果：第一章溶解溶质在介质中的输运行为，其特征在于由尖锐的界面分离的细颗粒和粗颗粒材料，使用新的MRI技术定性和定量地作为时间的函数，2）通过融合实验结果和输运建模来评估当前理论捕获该系统中输运行为的准确性，以及，3）结合模型分析实验结果，揭示影响污染物尾矿现象的因素，这对成本至关重要-有效的地下水修复。 变革性的成果将通过以下方式实现：1）采用新型MRI技术来揭示示踪剂在多孔介质中的传输行为，2）采用数学建模来模拟MRI实验中观察到的行为，以及3）结合实验和数学建模结果来分析示踪剂在细颗粒介质中的运动的影响，该细颗粒介质通过尖锐的界面与粗颗粒宿主分离。

1523488PinderTitle: EAGER: Contaminant Transport Behavior in and at the Interface of Fine-Grained Sediments; Visualization, Simulation and AnalysisEPA estimates that there are 235,000 to 355,000 contaminated groundwater sites across the United States that require remediation. The annual operation and maintenance costs, per site undergoing remediation, are estimated to range from $610,000 to $770,000. It is well known that contaminants behave differently in fine grained sediments and may lead to long term contamination of groundwater used as a source of drinking water. However, in spite of this high level of concern there is very little known about the behavior of contaminants that reside in these fine grained formations. It is therefore critical that the fundamental physical-chemical mechanisms responsible for contaminant behavior in fine-grained formations be thoroughly understood. The resulting analysis will elucidate the mechanisms that govern the long-term tailing phenomena observed in contaminated groundwater sites. Such contaminant tailing impacts industry financially, not only because of the direct costs, but also because of their requirement to hold money in reserve to assure long-term financial support for site remediation. The general public, government and industry seek to accelerate groundwater contamination cleanup and this research is designed to help satisfy this need. Finally, this proposal seeks directly to increase the number of women in engineering. The vehicle is the Engineering Institute that is one of four STEM components of the Governor's Institutes of Vermont.The combination of experimental investigation, modeling and analysis proposed in this proposal to address a critical environmental need will yield the following expected outcomes; 1) the transport behavior of dissolved solutes in media characterized by fine and coarse grained materials separated by a sharp interface will be revealed both qualitatively and quantitatively as a function of time using a novel MRI technology, 2) the veracity of current theory to capture the transport behavior in this system will be evaluated through the fusion of experimental results and transport modeling, and, 3) the experimental results in combination with the modeling will be analyzed to uncover the factors impacting the contaminant-tailing phenomenon which is critical to cost-effective groundwater remediation. The transformative outcomes will be achieved by; 1) employing novel MRI technology to reveal the behavior of tracer transport in porous media, 2) employing mathematical modeling to simulate the behavior observed in the MRI experiments, and, 3) combining experimental and mathematical modeling results to analyze the impact of the movement of tracers in fine-grained media separated from a coarse-grained host by a sharp interface.