COLLABORATIVE RESEARCH: Advanced Solid-State NMR Characterization of Non-Covalent Interactions of Organic Compounds in Soil and Sediment Organic Matter

合作研究：土壤和沉积物有机物中有机化合物非共价相互作用的先进固态核磁共振表征

• 批准号: 0853682
• 负责人: Joseph Pignatello
• 金额: $ 22.5万
• 依托单位: Connecticut Agricultural Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-15 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0853682&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Advanced; Solid; State

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).0853682 and 0853950Pignatello and MaoSorption by the soil/sediment organic matter (SOM) fraction of geosolids controls the fate of nonionic organic compounds in the environment, and is an underlying process affecting decision-making in analytical chemistry, risk assessment, and remediation strategy for specific pollutants. While NMR spectroscopy is potentially a powerful molecular-scale tool, it has so far provided limited insight into the mechanisms of sorption by solid-state SOM due to poor resolution. In the last few years, however, significant advances many by one of the PIs have been made in acquisition and spectral editing techniques of solid state NMR (1H, 13C, 129Xe and 2D analysis) that have yielded valuable new information about the structure of SOM solids. The PIs will apply many of these techniques, in combination with sorption experiments, to gain information about the nature of the sorbed complex. Materials of focus will include humic acid particles, whole soils and isolated SOM, black carbon standards, coal reference standards, and polymer standards. The objectives are: a) to probe structural changes of SOM taking place during sorption; b) to probe preferential sites of sorption in SOM in regions chemically homogeneous on a scale large enough to serve as separate sorption domains; and c) to quantify fused ring content and size and their influence on sorption affinity.The results of this work will influence the way research is designed and the way major concepts are taught in environmental engineering and science. Society will benefit broadly by changes in approaches to risk assessment and remediation design that will result from an improved conceptual model of the sorption process. The collaboration will significantly build research infrastructure because it will open additional avenues that can be explored in environmental engineering and science with NMR. The involvement of Native Americans through connections to tribal colleges is a strong feature of the educational benefits that can be derived from this work. Post-docs from the Pignatello research group have secured faculty positions at institutions where they will likely increase participation of under-represented populations to STEM disciplines. The curriculum materials to be developed for on-line resources for science teachers would allow effective dissemination of results to the K-12 level.

该奖项是根据2009年美国复苏和再投资法案资助的（公法111-5）.0853682和0853950土壤/沉积物有机质（SOM）部分的土壤固体吸附控制着环境中非离子有机化合物的命运，是影响分析化学，风险评估，针对具体污染物的治理策略。虽然NMR光谱是一个潜在的强大的分子尺度的工具，它到目前为止提供了有限的洞察固态SOM由于分辨率差的吸附机制。然而，在过去的几年中，许多由一个PI已经取得了显着的进步，在采集和光谱编辑技术的固态NMR（1H，13 C，129氘和二维分析），已经产生了宝贵的新信息的SOM固体的结构。PI将应用这些技术中的许多技术，结合吸附实验，以获得有关吸附复合物性质的信息。重点材料将包括腐殖酸颗粒，全土壤和孤立的有机质，黑碳标准，煤炭参考标准和聚合物标准。目标是：B）在化学上均匀的区域中探测SOM中的优先吸附位点，该区域的尺度足够大以用作单独的吸附域;以及c）量化稠环的含量和大小及其对吸附亲和力的影响。这项工作的结果将影响研究的设计方式和环境工程中主要概念的教学方式，科学社会将广泛受益于风险评估和补救设计方法的变化，这将导致吸附过程的概念模型的改进。这项合作将大大建立研究基础设施，因为它将开辟更多的途径，可以探索环境工程和科学与核磁共振。通过与部落学院的联系，美洲土著人的参与是可以从这项工作中获得教育效益的一个重要特点。Pignatello研究小组的博士后已经在机构中获得了教师职位，他们可能会增加代表性不足的人群对STEM学科的参与。为科学教师编制的在线资源课程材料将使成果有效地传播到K-12一级。