Probe Techniques for Studying Mediated Reduction Reactions of Organic Pollutants: Research Initiation Award

这是一个支持研究的奖项， 描述减少的策略 天然有机基质动力学 环境既严格 在理论上是决定性的， 适合于实际应用。 的 方法将是将物质 直接负责减少 有机污染物电子转移 介体以低稳态存在- 所述浓度，并可通过 它们与选择性探针的反应速率 化合物. 这个项目的第一部分 将鉴定合适的探针化合物 为可能的减少调解人，并核实 这些技术可以用于自然界 媒体 后来，最有希望的探测器 技术将被应用于显示， 探针技术 事实上，这有助于 减少环境系统。 最后， 整个方法的实用性 预测比还原率 有机污染物的反应 环境将被证明。 的 提交了导致该奖项的提案， 根据修改后的NSF 88-99， 变更日期为1991年9月19日，以使研究 启动奖公告符合 NSF 83-57的变化，并作为NSF 90发布- 77. 尽管最近的研究表明， 有机污染物厌氧反应 沉积物，土壤和地下水，它不是 但可以定量预测 任何这些转变的速率。 这 严格限制了对 在监管决策中的减少过程- 造成并导致了 修复技术依赖于 这些反应。 如果这项研究证明 就像它描述了 太阳表面光氧化动力学 水，它可能会影响最多的方式 还原动力学研究 厌氧环境系统中的反应 是在未来完成的。 成果 研究可能会应用于 工艺和系统的工程设计 净化土壤和地下水。

This is an award to support research to find a strategy for describing the reduction kinetics of organic substrates in natural environments that is both rigorously deterministic in theory as well as being amenable to practical application. The approach will be to treat the substance directly responsible for the reduction of organic pollutants as electron-transfer mediators that are present at low steady- state concentration and can be assayed by their rate of reaction with selective probe compounds. The first part of this project will be to identify suitable probe compounds for likely reduction mediators, and to verify that these techniques can be used in natural media. Later, the most promising probe technique will be applied to show that the mediator to which the probe technique responds is, in fact, contributing to reduction in environmental systems. Finally, the utility of the whole approach for predicting the rate of specific reduction reactions of organic pollutants in the environment will be demonstrated. The proposal leading to this award was submitted in response to NSF 88-99 as modified by changes dated 09/19/91 to make the Research Initiation Award announcement consistent with changes in NSF 83-57 and published as NSF 90- 77. Despite recent research on the reduction reactions of organic pollutants in anaerobic sediments, soils, and groundwaters, it is not yet possible to quantitatively predict the rates of any of these transformations. This severely restricts the consideration of reduction processes in regulatory decision- making and contributes to the unreliability of remediation technologies that rely on these reactions. If this research proves to be as successful as it was for describing the kinetics of photooxidation in sunlit surface water, it is likely to influence the way most research on the kinetics of reduction reactions in anaerobic environmental systems is done in the future. Results of this research are likely to be applied to engineering design of processes and systems for decontamination of soils and groundwater.