RUI: The Chemistry of Hydrogen Peroxide in Cloudwater

RUI：云水中过氧化氢的化学性质

• 批准号: 8911296
• 负责人: Judith Weinstein-Lloyd
• 金额: $ 6万
• 依托单位: SUNY College at Old Westbury
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-10-15 至 1991-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8911296&HistoricalAwards=false
• 关键词: RUI; Chemistry; Hydrogen; Peroxide; Cloudwater

For many years, society has treated the atmosphere as an infinite reservoir for diluting emissions from our factories and automobiles. we now know that sulfur and nitrogen oxide emissions have resulted in the phenomenon of acid rain, which is detrimental to plant and animal life as well as some building materials. Atmospheric chemists are engaged in studies of the processes by which these compounds are oxidized to sulfuric and nitric acids. such chemical information is necessary if we are ever to predict, for example, the geographical pattern of acidity reduction which would result from diminished emissions. This project focuses on hydrogen peroxide, which has been identified as a key oxidant for dissolved sulfur dioxide. Atmospheric hydrogen peroxide is believed to originate from hydroperoxyl and superoxide radicals. The production of hydrogen peroxide has been studied in the laboratory by observing the disappearance of the free radicals at relatively high concentration in carefully purified solutions. In this project, cobalt-60 radiation will be used to generate the radicals in cloudwater at levels characteristic of the ambient atmosphere. Samples will then be analyzed for the concentration of hydrogen peroxide and the rate of its formation in the presence and absence of common atmospheric contaminants. The experiments will help establish the appropriate reaction rates to use in models incorporating aqueous atmospheric processes.

多年来，社会一直将大气层视为 稀释工厂排放物的无限水库 和汽车。 我们现在知道硫和氮氧化物 排放导致了酸雨现象， 对植物和动物以及一些 建材. 大气化学家从事 对这些化合物氧化过程的研究 硫酸和硝酸。 这种化学信息 如果我们要预测，例如， 酸度降低的地理模式， 减少排放。 该项目的重点是过氧化氢， 被认为是溶解二氧化硫的关键氧化剂。 据信，大气过氧化氢来源于 过氧化氢和超氧自由基。 生产 过氧化氢已经在实验室中进行了研究， 观察自由基的消失， 高浓度的纯净溶液。 在这 项目，钴-60辐射将用于产生 云水中的自由基， 气氛 然后将分析样品的 过氧化氢的浓度和其 在存在和不存在共同大气的情况下形成 污染物。 这些实验将有助于建立 在模型中使用适当的反应速率， 大气水过程