Magnetic Resonance Studies of Intermolecular Interactions in Environmental Matrices

环境基质中分子间相互作用的磁共振研究

• 批准号: RGPIN-2016-04493
• 负责人: Longstaffe, James
• 金额: $ 1.68万
• 依托单位: University of Guelph
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=657944
• 关键词: Magnetic; Resonance; Studies; Intermolecular; Interactions

The proposed research is designed to address the need for a molecular-level understanding of contaminant behaviour in the environment and will focus on three research areas: (i) understanding the mechanisms through which small hydrophilic organic compounds associate with environmental matrices; (ii) the role that the supramolecular structure of natural organic matter plays in the occurrence of non-ideal sorption behaviour in terrestrial environments, including the retention and desorption of contaminants; and, (iii) the development of practical applications of Nuclear Magnetic Resonance (NMR) as a tool to probe contaminant behaviour in the environment.***More than 30% of the Earth's accessible freshwater is used for agricultural, industrial, and domestic activities. This important natural resource is continuously at risk to contamination from an estimated flux of 300 million tons of anthropogenic organic chemicals per year. The goal of the proposed research is to develop and improve our understanding of the associations and interactions that occur between chemical contaminants and environmental matrices in soils, sediments, and aquatic ecosystems. These interactions play an important role in governing the behaviour of contaminants in the environment, including: persistence, natural attenuation, transport, and environmental availability. Understanding the nature of these interactions at the molecular-level is seen as a prerequisite for the development of more accurate models of contaminant fate and exposure; such models are needed in order to develop more efficient and effective practices to manage and remediate contaminated environments. Elucidating molecular-level mechanisms in environmental systems is difficult due to the chemically complex and physically heterogeneous nature of environmental matrices and as such a full understanding of these processes is dependent upon the availability of molecular-level analytical tools that can overcome these challenges in order to observe these interactions directly. NMR, which is uniquely suited for the analysis of complex heterogeneous materials, is emerging as a powerful analytical tool to address the need for a molecular-level understanding of contaminant behaviour in the environment.**

拟议的研究旨在解决对环境中污染物行为的分子水平理解的需要，并将重点放在三个研究领域：(i)了解小亲水性有机化合物与环境基质相关联的机制；（ii）天然有机物质的超分子结构在陆地环境中发生非理想吸附行为（包括污染物的滞留和解吸）时所扮演的角色；（iii）发展核磁共振（NMR）的实际应用，作为探测环境中污染物行为的工具。***地球上可获得的淡水中有30%以上用于农业、工业和家庭活动。据估计，每年有3亿吨人为有机化学品流入，这一重要的自然资源不断受到污染的威胁。拟议研究的目标是发展和提高我们对土壤、沉积物和水生生态系统中化学污染物与环境基质之间的关联和相互作用的理解。这些相互作用在控制污染物在环境中的行为方面起着重要作用，包括：持久性、自然衰减、迁移和环境可利用性。在分子水平上理解这些相互作用的本质被视为开发更准确的污染物命运和暴露模型的先决条件；需要这种模式，以便发展更有效率和更有效的做法来管理和修复受污染的环境。由于环境基质的化学复杂性和物理异质性，阐明环境系统中的分子水平机制是困难的，因此对这些过程的充分理解取决于分子水平分析工具的可用性，这些工具可以克服这些挑战，以便直接观察这些相互作用。核磁共振，这是独特的适用于复杂的非均质材料的分析，正在成为一个强大的分析工具，以解决需要在分子水平上了解环境中的污染物行为