Examining the role of nanoparticles in the formation and degradation of methylated mercury in the ocean

研究纳米粒子在海洋中甲基化汞的形成和降解中的作用

基本信息

  • 批准号:
    1607913
  • 负责人:
  • 金额:
    $ 33万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2016
  • 资助国家:
    美国
  • 起止时间:
    2016-08-15 至 2021-07-31
  • 项目状态:
    已结题

项目摘要

In this project funded by the Environmental Chemistry Program in the Chemistry Division at the National Science Foundation, Professors Robert Mason and Jing Zhao of the University of Connecticut examine the role of nanoparticles in controlling the reactions between various forms of mercury in the ocean. Specifically, in contrast to freshwater environments, dimethylmercury is found in all ocean waters where measurements have been made. There is little information on its formation mechanisms. The investigators have preliminary evidence to indicate that it may be formed by reactions that involve nanoparticles and other surfaces. It is known that methylmercury, an organic form of mercury found in the ocean, is mostly formed by bacteria that react with inorganic mercury. Reactive surfaces are also be important in the degradation of methylmercury. The project trains a graduate student in diverse aspects of environment chemistry, and engages undergraduates and high school students, providing avenues for research, teaching and outreach. The investigators incorporate the research into ongoing outreach programs. They use the information generated from the project in developing their graduate and undergraduate teaching curricula. The results are published in the peer-reviewed literature, with the graduate student as the lead author. The investigators conduct laboratory experiments with both commercially manufactured and natural nanomaterials to examine the potential importance of metal nanoparticles in forming metallic and organic forms of mercury under conditions applicable to the ocean. Techniques used in these experiments include UV-visible and fluorescence spectroscopy, electron microscopy and mass spectrometry. Mercury analyses require instruments that are specifically designed for measurement of the different forms of mercury at low concentrations. The results of this research enhance our understanding of the processes that form methylated mercury in the ocean which, when bioaccumulated into seafood is an important human health concern. Professors Mason and Zhao incorporate their findings into their outreach communications with managers and regulators interested in mitigating the impacts of anthropogenic mercury emissions on the biosphere through such treaties as the Minamata Convention.
在这个由美国国家科学基金会化学部环境化学项目资助的项目中,康涅狄格大学的罗伯特·梅森教授和赵晶教授研究了纳米颗粒在控制海洋中各种形式汞之间反应的作用。具体而言,与淡水环境相比,在所有进行过测量的海洋沃茨中都发现了二甲基汞。关于其形成机制的信息很少。 研究人员有初步证据表明,它可能是由涉及纳米颗粒和其他表面的反应形成的。众所周知,甲基汞是海洋中发现的汞的有机形式,主要由细菌与无机汞反应形成。 活性表面在甲基汞的降解中也很重要。该项目在环境化学的各个方面培训研究生,并吸引本科生和高中生,为研究,教学和推广提供途径。研究人员将研究纳入正在进行的推广计划。 他们利用该项目产生的信息来开发他们的研究生和本科教学课程。研究结果发表在同行评议的文献中,研究生是第一作者。 研究人员使用商业制造和天然纳米材料进行实验室实验,以研究金属纳米颗粒在适用于海洋的条件下形成金属和有机形式的汞的潜在重要性。在这些实验中使用的技术包括紫外可见和荧光光谱,电子显微镜和质谱。汞分析需要专门为测量低浓度下不同形式的汞而设计的仪器。这项研究的结果增强了我们对海洋中形成甲基化汞的过程的理解,当生物积累到海鲜中时,这是一个重要的人类健康问题。梅森教授和赵教授将他们的研究结果纳入他们与管理人员和监管机构的外联交流中,这些管理人员和监管机构有兴趣通过《水俣公约》等条约减轻人为汞排放对生物圈的影响。

项目成果

期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
The precipitation, growth and stability of mercury sulfide nanoparticles formed in the presence of marine dissolved organic matter
海洋溶解有机物存在下形成的硫化汞纳米粒子的沉淀、生长和稳定性
  • DOI:
    10.1039/c7em00593h
  • 发表时间:
    2018
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Mazrui, Nashaat M.;Seelen, Emily;King'ondu, Cecil K.;Thota, Sravan;Awino, Joseph;Rouge, Jessica;Zhao, Jing;Mason, Robert P.
  • 通讯作者:
    Mason, Robert P.
Abiotic Reduction of Mercury(II) in the Presence of Sulfidic Mineral Suspensions
  • DOI:
    10.3389/fenvc.2021.660058
  • 发表时间:
    2021-06-14
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Coulibaly, Mariame;Mazrui, Nashaat M.;Mason, Robert P.
  • 通讯作者:
    Mason, Robert P.
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Robert Mason其他文献

The acute local effects of prednisone on the gastric mucosa
  • DOI:
    10.1007/bf02239212
  • 发表时间:
    1968-01-01
  • 期刊:
  • 影响因子:
    2.500
  • 作者:
    A. Thomas Smith;Robert Mason;Harry Oberhelman
  • 通讯作者:
    Harry Oberhelman
Flavour oscillations in pseudo-Hermitian quantum theories
伪厄米量子理论中的风味振荡
A computational framework to support probabilistic criticality modelling for the geological disposal of radioactive waste
  • DOI:
    10.1016/j.anucene.2024.110965
  • 发表时间:
    2025-02-01
  • 期刊:
  • 影响因子:
  • 作者:
    E. Adam Paxton;Jiejie Wu;Tim Hicks;Slimane Doudou;David Applegate;Robert Mason;Andrew Price;Liam Payne
  • 通讯作者:
    Liam Payne
Palliation of malignant dysphagia: an alternative to surgery.
恶性吞咽困难的缓解:手术的替代方案。
Acute renal failure secondary to laparoscopic parastomal hernia repair: A cautionary tale
  • DOI:
    10.1016/j.bjmsu.2009.01.002
  • 发表时间:
    2009-09-01
  • 期刊:
  • 影响因子:
  • 作者:
    Odunayo Kalejaiye;Robert Mason;David Defriend
  • 通讯作者:
    David Defriend

Robert Mason的其他文献

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{{ truncateString('Robert Mason', 18)}}的其他基金

Constraining the air-sea exchange of inorganic and methylated mercury with high resolution spatial and temporal measurements in the Sargasso Sea
通过马尾藻海的高分辨率空间和时间测量限制无机汞和甲基化汞的海气交换
  • 批准号:
    2319385
  • 财政年份:
    2023
  • 资助金额:
    $ 33万
  • 项目类别:
    Standard Grant
Collaborative Research: The effects of terrestrial organic matter inputs on coastal mercury cycling, methylmercury production and bioaccumulation
合作研究:陆地有机物质输入对沿海汞循环、甲基汞产生和生物累积的影响
  • 批准号:
    2148407
  • 财政年份:
    2022
  • 资助金额:
    $ 33万
  • 项目类别:
    Standard Grant
Collaborative Research: US GEOTRACES GP-17- OCE and -ANT Sections: External sources, cycling and processes affecting mercury speciation in the South Pacific and Southern Oceans
合作研究:US GEOTRACES GP-17- OCE 和 -ANT 部分:影响南太平洋和南大洋汞形态的外部来源、循环和过程
  • 批准号:
    2152636
  • 财政年份:
    2022
  • 资助金额:
    $ 33万
  • 项目类别:
    Continuing Grant
The brain organization of STEM concept knowledge: a neurally-based foundation for training, measuring, and assessing concept learning from basic knowledge to expertise
STEM概念知识的大脑组织:基于神经的基础,用于训练、测量和评估从基础知识到专业知识的概念学习
  • 批准号:
    2215741
  • 财政年份:
    2022
  • 资助金额:
    $ 33万
  • 项目类别:
    Standard Grant
Methylated mercury sources and cycling in the high latitude North Atlantic
北大西洋高纬度地区的甲基化汞来源和循环
  • 批准号:
    2123575
  • 财政年份:
    2021
  • 资助金额:
    $ 33万
  • 项目类别:
    Standard Grant
Collaborative Research: Constraining the role of chemical transformations in the cycling of mercury at the Arctic Ocean air-sea interface
合作研究:限制化学转化在北冰洋海气界面汞循环中的作用
  • 批准号:
    1854454
  • 财政年份:
    2020
  • 资助金额:
    $ 33万
  • 项目类别:
    Standard Grant
Assessing the changes in the brain representations of individual STEM concepts in the course of learning
评估学习过程中各个 STEM 概念的大脑表征的变化
  • 批准号:
    1748897
  • 财政年份:
    2018
  • 资助金额:
    $ 33万
  • 项目类别:
    Standard Grant
US GEOTRACES Pacific Meridional Transect: Determination of the air-sea exchange of inorganic and methylated mercury in the anthropogenically-impacted and remote Pacific Ocean
美国 GEOTRACES 太平洋经线横断面:测定受人为影响的偏远太平洋中无机汞和甲基化汞的海气交换
  • 批准号:
    1736659
  • 财政年份:
    2017
  • 资助金额:
    $ 33万
  • 项目类别:
    Standard Grant
Support for activities related to the 13th International Conference of Mercury as a Global Pollutant
支持第十三届汞作为全球污染物国际会议的相关活动
  • 批准号:
    1633908
  • 财政年份:
    2016
  • 资助金额:
    $ 33万
  • 项目类别:
    Continuing Grant
Collaborative research: Transformations and mercury isotopic fractionation of methylmercury by marine phytoplankton
合作研究:海洋浮游植物对甲基汞的转化和汞同位素分馏
  • 批准号:
    1634048
  • 财政年份:
    2016
  • 资助金额:
    $ 33万
  • 项目类别:
    Standard Grant

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