Oxidant Generation during Fe(II) Oxidation in the Mixing Zone of Subterranean Estuaries: An Integrated laboratory and Field Study

地下河口混合区 Fe(II) 氧化过程中氧化剂的生成：综合实验室和现场研究

• 批准号: 0752473
• 负责人: John Ferry
• 金额: $ 49.87万
• 依托单位: University South Carolina Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-02-15 至 2011-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0752473&HistoricalAwards=false
• 关键词: Oxidant; Generation; during; Fe; II

The oxidation of Fe(II) by oxygen leads to the formation of a large family of reactive oxygen species, including the superoxide anion radical, hydrogen peroxide, and the hydroxyl radical. In the coastal ocean, the formation of these strong oxidants is usually considered a function of the interaction of solar radiation with common dissolved constituents of seawater. Two investigators from the University of South Carolina hypothesize the flux and cycling of Fe(II) within the mixing zone of subterranean estuaries is another important factor governing the formation and export of strong oxidants in coastal marine systems. To test their hypothesis, the scientists would determine the yield and formation rate of superxoide, hydrogen peroxide, the hydroxyl radical, and carbonate radical during the mixing of Fe(II) rich groundwater with oxygen rich seawater using the following: (1) multifactorial experimental designs to determine how those production capacities change in the laboratory as a function of a varying system of Fe(II), pH, salinity, natural organic matter, phosphate, and total carbonate ion; and (2) test the experimental outcome by characterizing the oxidant formation capacity of groundwater collected from several well described submarine estuary systems. Broader Impacts. Set up a "Citizen's School for Coastal Water" to educate about 50 members of the public and teachers on water related issues in the State of South Carolina during a during a three day meeting. Two graduate and two undergraduate students would be supported and trained as part of this project.

Fe(II) 被氧氧化导致形成一大类活性氧，包括超氧阴离子自由基、过氧化氢和羟​​基自由基。 在沿海海洋中，这些强氧化剂的形成通常被认为是太阳辐射与海水中常见溶解成分相互作用的结果。南卡罗来纳大学的两名研究人员假设，地下河口混合区内 Fe(II) 的通量和循环是控制沿海海洋系统中强氧化剂形成和输出的另一个重要因素。 为了检验他们的假设，科学家们将使用以下方法确定富含 Fe(II) 的地下水与富氧海水混合过程中超氧化物、过氧化氢、羟基自由基和碳酸盐自由基的产量和形成速率：(1) 多因素实验设计，以确定这些生产能力在实验室中如何随着 Fe(II)、pH、盐度、天然有机物的变化系统而变化。 物质、磷酸盐和总碳酸根离子； (2) 通过表征从几个详细描述的海底河口系统收集的地下水的氧化剂形成能力来测试实验结果。更广泛的影响。 设立“沿海水资源公民学校”，在为期三天的会议期间对南卡罗来纳州约 50 名公众和教师进行水相关问题的教育。 作为该项目的一部分，两名研究生和两名本科生将得到支持和培训。