RUI: Fundamental Investigation Towards Phosphorus Recovery Through Organophosphate Pesticide Degradation by Molybdate Complexes

RUI：通过钼酸盐复合物降解有机磷农药回收磷的基础研究

• 批准号: 1807876
• 负责人: Louis Kuo
• 金额: $ 24.87万
• 依托单位: Lewis and Clark College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1807876&HistoricalAwards=false
• 关键词: RUI; Fundamental; Investigation; Towards; Phosphorus

This project is funded by the Environmental Chemical Sciences Program of the Chemistry Division. Pesticides and herbicides are used to kill weeds and insects, but these chemicals last a long time and can be found throughout the environment. These chemicals can be damaging to animals and humans, and have even been implicated in neurodegenerative diseases. Using basic chemistry techniques, this project from Professor Louis Kuo at Lewis and Clark College looks for ways to make these pesticides and herbicides safer. A main ingredient in these chemicals is the element phosphorus. This project also investigates the use of non-toxic metals to collect, break down, safely recover, and transform the phosphate-based toxins for a new use. Phosphorus is non-renewable and essential for life on earth, so recycling it is important for sustainability. This research lies at the interface of inorganic and organic chemistry, and uses a combination of experimental and computational techniques. Undergraduate researchers, high school students, and high school teachers participate in this project, while engaging in meaningful science within the context of safe environmental stewardship.This research project addresses environmental toxin remediation and phosphorus recovery. Organophosphates (OP) are agricultural pesticides that are now ubiquitous in the environment. As such, there is a need for materials that degrade these OP pesticides in a practical fashion. This goal is more meaningful when the degraded OP pesticides are recovered as usable organophosphates since phosphorus is an essential but non-renewable resource. This study focuses on using supported and solution=-phase molybdenum complexes that convert organophosphate toxins into commodity chemicals. Specifically, the project examines how polystyrene-supported and picolinato (solution) complexes of molybdenum-peroxo compounds convert sulfur-containing organophosphate pesticides and the widely-used glyphosate herbicide (Roundup) into phosphate commodity chemicals. Several hypothetical routes involving reactive oxygen species are tested with spectroscopic studies on solution models and supported molybdenum-peroxo complexes. In parallel with the experimental work there is a computational component using density functional theory that simulates the organophosphate reactions. The goal is to predict and design better molybdenum complexes that accomplish the organophosphate degradation. In this connection, the long term goal is to develop new supported and practical molybdenum-peroxo materials that degrade the organophosphate toxins into value-added materials.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

本项目由化学学部环境化学科学项目资助。杀虫剂和除草剂被用来杀死杂草和昆虫，但这些化学物质持续很长时间，可以在整个环境中找到。这些化学物质可能对动物和人类有害，甚至与神经退行性疾病有关。路易斯和克拉克学院的路易斯·郭教授的这个项目利用基本的化学技术，寻找使这些杀虫剂和除草剂更安全的方法。这些化学品的主要成分是元素磷。该项目还研究了使用无毒金属来收集、分解、安全回收并将磷酸盐毒素转化为新用途。磷是不可再生的，对地球上的生命至关重要，所以磷的回收利用对可持续发展很重要。本研究处于无机化学和有机化学的交叉点，采用实验和计算相结合的方法。本科研究人员、高中生和高中教师参与这个项目，同时在安全环境管理的背景下从事有意义的科学研究。本研究项目涉及环境毒素修复和磷回收。有机磷（OP）是一种农业农药，现在在环境中无处不在。因此，需要以实用的方式降解这些OP农药的材料。当降解的有机磷农药被回收为可用的有机磷时，这一目标更有意义，因为磷是一种必不可少但不可再生的资源。本研究的重点是使用负载和溶液相钼配合物将有机磷毒素转化为商品化学品。具体而言，该项目研究了聚苯乙烯支撑的钼-过氧化合物和吡啶酸（溶液）配合物如何将含硫有机磷农药和广泛使用的草甘膦除草剂（农达）转化为磷酸盐商品化学品。几种假设的路线涉及活性氧的测试与光谱研究的溶液模型和负载钼-过氧配合物。在实验工作的同时，还有一个使用密度泛函理论模拟有机磷反应的计算组件。目的是预测和设计更好的钼配合物来完成有机磷酸盐的降解。在这方面，长期目标是开发新的支撑和实用的钼-过氧材料，将有机磷毒素降解为增值材料。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。