EAGER: The camouflaging of terrigenous organic matter as marine organic matter through hydroxyl radical oxidation via the dark Fenton reaction

EAGER:通过暗芬顿反应的羟基自由基氧化将陆源有机物伪装成海洋有机物

基本信息

项目摘要

Organic carbon in the ocean is made-up of materials delivered by riverine runoff from land and marine sources. However, even though a large amount of land-derived organic carbon enters the ocean from rivers, most carbon in the ocean appears to be from marine sources. This has led scientists to conclude that land-derived carbon is not transported far into the ocean. This EAGER project aims to test this assumption. The team of scientists will examine whether chemical reactions alter the composition of land-derived organic carbon in a way that makes it look like marine organic carbon. If this proves true, the results could explain why land-derived organic carbon is difficult to identify in the ocean and could lead to a reconsideration of present carbon budgets and models. The scientists will perform experiments using land-derived carbon collected from major river systems throughout the world. Samples will be introduced to reactive oxygen species (mainly hydroxyl radicals) and iron in the dark under conditions that occur in nature. Reaction rates and changes in the composition of the organic matter will be monitored during and following the experiments. This EAGER project provides research training and valuable professional development experience for an early career researcher who has not received prior support from NSF. Undergraduate students enrolled in STEM and REU programs at the lead institutions will participate in the research.This EAGER project examines the hypothesis that hydroxyl radicals generated during dark Fenton reactions react with terrigenous organic matter to produce organic matter that is compositionally and isotopically similar to marine organic matter. The PIs will test this hypothesis using environmentally relevant concentrations of hydroxyl radical and terrestrial organic matter samples collected from several large-scale terrestrial riverine systems. The PIs will use multiple methods to characterize bulk organic matter (infrared/nuclear magnetic resonance (NMR) spectroscopy), its molecular composition (electrospray ionization Fourier Transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS), and stable isotope values of carbon and nitrogen (δ13C, δ15N) of dissolved and particulate organic matter pools before, during and following the experiments. This study explores an untested, but potentially transformative hypothesis that could alter existing paradigms about the fate of terrestrial organic matter in the ocean. Results from this study could revise understanding of the contributions of terrigenous organic matter to the ocean carbon cycle. The project would provide research and professional development opportunities for an early career investigator who has not received prior NSF support (co-PI Goranov). Undergraduates enrolled in REU and STEM training programs at the PIs’ home institutions would participate in the research.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
海洋中的有机碳是由来自陆地和海洋的河流径流输送的物质组成的。然而,尽管大量来自陆地的有机碳从河流进入海洋,但海洋中的大多数碳似乎来自海洋。这使得科学家们得出结论,陆地产生的碳不会被输送到海洋很远的地方。这个EAGER项目旨在测试这一假设。这组科学家将研究化学反应是否会改变陆地有机碳的组成,使其看起来像海洋有机碳。如果这被证明是正确的,研究结果可以解释为什么来自陆地的有机碳难以在海洋中识别,并可能导致对目前碳预算和模型的重新考虑。科学家们将利用从世界各地主要河流系统收集的陆地碳进行实验。样品将在黑暗中在自然条件下被引入活性氧(主要是羟基自由基)和铁。在实验期间和之后,将监测反应速率和有机物组成的变化。该EAGER项目为未获得NSF支持的早期研究人员提供研究培训和宝贵的专业发展经验。在主要院校就读STEM和REU项目的本科生将参与研究。这个EAGER项目检验了暗芬顿反应中产生的羟基自由基与陆源有机质反应产生的有机物质在组成和同位素上与海洋有机质相似的假设。pi将使用从几个大型陆地河流系统收集的与环境相关的羟基自由基浓度和陆地有机质样本来验证这一假设。pi将使用多种方法来表征大量有机物质(红外/核磁共振(NMR)光谱),其分子组成(电喷雾电离傅立叶变换离子回旋共振质谱(ESI FT-ICR MS),以及溶解和颗粒有机物质池的碳和氮的稳定同位素值(δ13C, δ15N)。这项研究探索了一个未经检验但具有潜在变革性的假设,它可能改变关于海洋中陆生有机物命运的现有范式。这一研究结果有助于修正对陆源有机质对海洋碳循环贡献的认识。该项目将为未获得NSF支持的早期职业研究者提供研究和专业发展机会(共同pi Goranov)。在pi所在机构参加REU和STEM培训项目的本科生将参与这项研究。该奖项反映了美国国家科学基金会的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

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Patrick Hatcher其他文献

LC/MSおよびFT-ICRMSを用いた琵琶湖溶存有機物中の親水性紫外線吸収物質の同定
使用 LC/MS 和 FT-ICRMS 鉴定琵琶湖溶解有机物中的亲水性紫外线吸收物质
  • DOI:
  • 发表时间:
    2008
  • 期刊:
  • 影响因子:
    0
  • 作者:
    和田千弦;早川和秀;鈴木智代;熊谷哲;Patrick Hatcher;杉山裕子
  • 通讯作者:
    杉山裕子
Chemical Characterization of Dissolved Organic Matter in Lake Biwa Using C_<18> and DAX8 Solid Phase Extraction
使用 C_<18> 和 DAX8 固相萃取对琵琶湖溶解有机物进行化学表征
  • DOI:
  • 发表时间:
    2010
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Fumiko Kitano;Takaya Nishimoto;Chizuru Wada;Tetsu Kumagai;Jun Shimano;Masahiro Maruo;Kumiko Tsuda;Hidekado Shirai;Nobuhide Fujitake;Kazuhide Hayakawa;Patrick Hatcher;Yuko Sugiyama
  • 通讯作者:
    Yuko Sugiyama
Chemical Characterization of Dissolved Organic Matter in Lake Biwa Using C_18 and DAX8 Solid Phase Extraction
使用 C_18 和 DAX8 固相萃取对琵琶湖溶解有机物进行化学表征
  • DOI:
  • 发表时间:
    2010
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Fumiko Kitano;Takaya Nishimoto;Chizuru Wada,Tetsu Kumagai;Jun Shimano;Masahiro Maruo;Kumiko Tsuda;Hidekado Shirai;Nobuhide Fujitake;Kazuhide Hayakawa;Patrick Hatcher;Yuko Sugiyama
  • 通讯作者:
    Yuko Sugiyama
Chemical Characterization of Dissolved Organic Matter in Lake Biwa Using C_<18> Solid Phase Extraction
使用 C_<18> 固相萃取对琵琶湖溶解有机物进行化学表征
  • DOI:
  • 发表时间:
    2010
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Fumiko Kitano;Takaya Nishimoto;Chizuru Wada;Tetsu Kumagai;Jun Shimano;Masahiro Maruo;Kumiko Tsuda;Hidekado Shirai;Nobuhide Fujitake;Kazuhide Hayakawa;Patrick Hatcher;Yuko Sugiyama
  • 通讯作者:
    Yuko Sugiyama
SEIB-DGVMを用いた沖縄島漫湖干潟マングローブ林の動態予測
利用 SEIB-DGVM 动态预测冲绳岛 Manko 滩涂红树林
  • DOI:
  • 发表时间:
    2008
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Fumiko Kitano;Takaya Nishimoto;Chizuru Wada;Tetsu Kumagai;Jun Shimano;Masahiro Maruo;Kumiko Tsuda;Hidekado Shirai;Nobuhide Fujitake;Kazuhide Hayakawa;Patrick Hatcher;Yuko Sugiyama;諏訪錬平
  • 通讯作者:
    諏訪錬平

Patrick Hatcher的其他文献

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{{ truncateString('Patrick Hatcher', 18)}}的其他基金

Collaborative Research: The chemistry of lignin's photochemical transformation in the environment: implications for global carbon cycling
合作研究:环境中木质素光化学转化的化学:对全球碳循环的影响
  • 批准号:
    1610021
  • 财政年份:
    2016
  • 资助金额:
    $ 30万
  • 项目类别:
    Continuing Grant
Collaborative Research: Dissolved pyrogenic organic matter dynamics in the environment
合作研究:环境中溶解热解有机物动力学
  • 批准号:
    1451452
  • 财政年份:
    2015
  • 资助金额:
    $ 30万
  • 项目类别:
    Continuing Grant
Collaborative Research: Coupled Geochemical and Geobiological Characterization of Dissolved Matter Oxidation to Carbon Dioxide
合作研究:溶解物质氧化成二氧化碳的地球化学和地球生物学耦合表征
  • 批准号:
    1452035
  • 财政年份:
    2015
  • 资助金额:
    $ 30万
  • 项目类别:
    Continuing Grant
Collaborative Research: Molecular Level Characterization of Organic Matter in Ice Cores using High-resolution FTICR mass spectrometry
合作研究:使用高分辨率 FTICR 质谱法对冰芯中有机物进行分子水平表征
  • 批准号:
    0739684
  • 财政年份:
    2008
  • 资助金额:
    $ 30万
  • 项目类别:
    Continuing Grant
Collaborative Research: Resistance of Peptide Degradaton Products in Seawater
合作研究:海水中肽降解产物的抗性
  • 批准号:
    0726759
  • 财政年份:
    2007
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
Collaborative Research: Investigations into the Temporal & Source-Dependent Chemical Compositions & Reactivity of Natural Dissolved Organic Matter
合作研究:时间调查
  • 批准号:
    0612712
  • 财政年份:
    2006
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
Collaborative Research: Investigations into the Temporal & Source-Dependent Chemical Compositions & Reactivity of Natural Dissolved Organic Matter
合作研究:时间调查
  • 批准号:
    0453777
  • 财政年份:
    2005
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
Collaborative Research: Investigations into the Temporal & Source-Dependent Chemical Compositions & Reactivity of Natural Dissolved Organic Matter
合作研究:时间调查
  • 批准号:
    0453743
  • 财政年份:
    2005
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
Beyond the Mineral Sorptive Protection Hypothesis: Protein Preservation in Marine Systems via Formation of High-Molecular Mass Aggregates
超越矿物质吸附保护假说:通过形成高分子聚集体在海洋系统中保存蛋白质
  • 批准号:
    0136631
  • 财政年份:
    2002
  • 资助金额:
    $ 30万
  • 项目类别:
    Standard Grant
Survival of Proteins in Marine Systems: Role of Macromolecular Organic Matter
海洋系统中蛋白质的生存:大分子有机物的作用
  • 批准号:
    9896239
  • 财政年份:
    1998
  • 资助金额:
    $ 30万
  • 项目类别:
    Continuing Grant

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Non-binary experiences of autism: Social camouflaging and stakeholder views on inclusive environments in secondary schools
自闭症的非二元经历:社会伪装和利益相关者对中学包容性环境的看法
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Are aging outcomes worse for women with autism? Sex differences in the neurocircuitry of symptom camouflaging and its vulnerability to aging
对于患有自闭症的女性来说,衰老结果是否会更糟?
  • 批准号:
    9910018
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    2019
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Are aging outcomes worse for women with autism? Sex differences in the neurocircuitry of symptom camouflaging and its vulnerability to aging
对于患有自闭症的女性来说,衰老结果是否会更糟?
  • 批准号:
    10246978
  • 财政年份:
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