MOLECULAR SCALE MERCURY SPECIATION IN FISH TISSUES FROM LAHONTAN RESERVOIR NY

纽约拉洪坦水库鱼组织中的分子尺度汞形态

• 批准号: 7721887
• 负责人: YUJI ARAI
• 金额: $ 0.02万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-03-01 至 2009-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7721887
• 关键词: Affect; Bass; Chemicals; Collaborations; Computer Retrieval of Information on Scientific Projects Database; Development; Fishes; Funding; Grant; Guidelines; Institution; Measurement; Mercury; Mining; Modeling; Molecular; Monitor; Oral cavity; Organism; Phytoplankton; Process; Research; Research Personnel; Resources; Site; Source; System; Time; Tissues; Toxic effect; United States Environmental Protection Agency; United States National Institutes of Health; Zooplankton; bioaccumulation; interest; molecular scale; water quality

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. In collaboration with upcoming monitoring efforts by the U.S. Environmental Protection Agency, we are interested in examining shifts in mercury speciation through lower-trophic levels (e.g., phytoplankton and zooplankton), which typically generate higher (sometimes by 3 to 4 orders of magnitude) bioaccumulation factors for mercury, to upper-trophic levels (e.g., large mouth bass). The upper trophic level game fish has been shown in other mercury-contaminated systems to generate mercury concentrations over an order of magnitude above the USEPA Water Quality Guideline for mercury (currently 0.3 ppm). Because the toxicity of mercury is dependent on its chemical speciation, understanding mercury associations on a molecular level is critical to the effective management of contaminant sources and loads as well as to the development of process-integrated water-quality models for mining-affected aquatic systems. This beam time will be used to assess the feasibility of Hg LIII-edge bulk-XAS measurements in large-mouth bass that has the highest levels of mercurty among different organisms at the study site.

该子项目是利用该技术的众多研究子项目之一 资源由 NIH/NCRR 资助的中心拨款提供。子项目和 研究者 (PI) 可能已从 NIH 的另一个来源获得主要资金， 因此可以在其他 CRISP 条目中表示。列出的机构是 对于中心来说，它不一定是研究者的机构。 在与美国环境保护署即将开展的监测工作的合作中，我们有兴趣研究汞形态从低营养级（例如浮游植物和浮游动物）到高营养级（例如大口黑鲈）的变化，低营养级通常会产生较高（有时达 3 到 4 个数量级）的汞生物累积因子。 在其他受汞污染的系统中，上层营养级的野味鱼所产生的汞浓度比 USEPA 汞水质指南（目前为 0.3 ppm）高出一个数量级。由于汞的毒性取决于其化学形态，因此在分子水平上了解汞的关联对于污染物源和负荷的有效管理以及为受采矿影响的水生系统开发过程集成水质模型至关重要。该波束时间将用于评估大口黑鲈中 Hg LIII 边缘散装 XAS 测量的可行性，大口黑鲈在研究地点的不同生物体中汞含量最高。