Reduction of Nitrogen-Oxygen Containing Contaminants (NOCs) in Aquatic Environments

减少水生环境中的氮氧污染物 (NOC)

• 批准号: 1507981
• 负责人: Huichun Zhang
• 金额: $ 30万
• 依托单位: Temple University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2017-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1507981&HistoricalAwards=false
• 关键词: Reduction; Nitrogen; Oxygen; Containing; Contaminants; Reduction; Nitrogen; Oxygen; Containing; Contaminants

With this award, the Environmental Chemical Sciences Program of the Division of Chemistry is funding Professor Huichun J. Zhang of Temple University to examine the nitrogen-oxygen single bond (N-O) as a reducible functional group toward reductive transformations under environmental conditions. The introduction of N-O containing contaminants (NOCs) into aquatic environments is an important emerging water issue. This project aims to develop accurate environmental risk assessment of NOCs and to develop advanced technologies to effectively treat NOCs contaminated water and sites. The findings are expected to help guide the chemical industry to design more environmentally-friendly chemical products. The project is expected to broaden participation from underrepresented minorities and women in environmental chemistry/engineering and to provide training for future scientists and engineers in this cross-disciplinary area.This project focuses on examining reduction kinetics and mechanisms of a diverse range of NOCs by soluble Fe(II) species through a combination of experimental and theoretical approaches. Advanced experimental approaches, including kinetic, electrochemical cell, isotopic, spectroscopic and chromatographic approaches, are to be conducted to elucidate key elementary steps in NOC reductions, such as protonation, complexation, electron transfer and N-O bond cleavage. The most likely rate-limiting step of each subset of NOCs is to be identified by characterizing all of the stationary points in the relevant elementary steps along the reaction pathway. Molecular descriptors are being computed to develop quantitative structure-activity relationships so as to provide the community with quantifiable and experimentally grounded numbers that pertain to the susceptibility of N-O bonds to reductive cleavage in the environment.

有了这个奖项，化学系的环境化学科学计划是坦普尔大学的Huichun J. Zhang教授，以检查氮氧单键（N-O），作为一个可还原的功能群体，可在环境条件下进行还原。 将N-O含有污染物（NOC）引入水生环境是一个重要的新兴水问题。 该项目旨在开发NOC的准确环境风险评估，并开发先进的技术以有效治疗NOC污染的水和现场。 这些发现有望帮助指导化学工业设计更环保的化学产品。 预计该项目将扩大代表性不足的少数群体和妇女在环境化学/工程中的参与，并在这个跨学科领域为未来的科学家和工程师提供培训。该项目致力于通过实验和理性方法结合使用可溶性FE（II）种类的NOC（ii）种类的NOC（II）种类的减少动力学和机制。 要进行先进的实验方法，包括动力学，电化学细胞，同位素，光谱和色谱方法，以阐明NOC降低的关键基本步骤，例如质子化，络合，电子转移和N-O键裂解。 每个NOC子集的最可能限速步骤是通过表征沿着反应途径的相关基本步骤中所有固定点的表征来识别的。 正在计算分子描述符以发展定量的结构活性关系，以便为社区提供可量化的实验基础数量，这些数字与N-O键在环境中还原裂解的易​​感性有关。