The Chemistry of Hydrogen Peroxide in Cloudwater
云水中过氧化氢的化学性质
基本信息
- 批准号:8808480
- 负责人:
- 金额:$ 4.24万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1988
- 资助国家:美国
- 起止时间:1988-06-01 至 1989-11-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Acid rain has become a major concern during the past decade. Rain has a natural acidity due to dissolved carbon dioxide. The acidity of rain is made even greater by the emission of certain gases from human endeavors. Coal burning power plants emit substantial quantities of sulfur dioxide and high temperature combustion processes, such as automobile engines, yield nitrogen oxides. These gases are eventually converted into acids. A description of the chemical processes involved in changing these gases into acids and the speed of these reactions are important keys to understanding the geographic distribution of acid rain and the impact of particular sources of the precursor gases. Sulfur dioxide dissolves into water droplets which provide a chemical medium for the oxidation of sulfur dioxide into acid. A vital species in this reaction is hydrogen peroxide. It is therefore important to understand the mechanisms by which hydrogen peroxide is formed and destroyed in the atmosphere. Hydrogen peroxide is highly soluble and is known to have deleterious effects on plants. In contrast to the gas phase chemistry of hydrogen peroxide, the chemistry in droplets is not well understood. This project focuses on examining the aqueous chemistry of hydrogen peroxide with emphasis on laboratory studies of the reactions that form and destroy hydrogen peroxide under conditions approximating those found in cloudwater. The chemistry will be investigated by the technique of radiolysis in synthetic precipitation, i. e., aqueous solutions of known composition approximating that of cloudwater. These laboratory studies will provide data to test the applicability of various models of cloud chemistry.
酸雨在过去已成为一个主要问题 十年 雨水由于溶解了碳而具有天然的酸性 二氧化物 雨水的酸度更大, 人类活动排放的某些气体。 燃煤 发电厂排放大量的二氧化硫, 高温燃烧过程,如汽车 发动机产生氮氧化物 这些气体最终 转化为酸。 化学过程的描述 参与将这些气体转化为酸, 这些反应是理解 酸雨的地理分布及 前体气体的特定来源。 二氧化硫溶解成水滴, 一种将二氧化硫氧化成 酸 在这个反应中一个重要的物种是过氧化氢。 因此,重要的是要了解 过氧化氢在大气中形成并被破坏。 过氧化氢是高度可溶的,并且已知具有 对植物的有害影响。 与气相相比, 过氧化氢的化学成分,液滴中的化学成分是 没有被很好地理解。 该项目的重点是研究水化学的 过氧化氢,重点是实验室研究, 反应形成和破坏过氧化氢下 类似云水的环境。 的 化学将通过以下技术进行研究: 在合成沉淀中的辐解,即例如,水溶液 已知成分接近云水的成分。 这些 实验室研究将提供数据,以测试适用性 云化学的各种模型。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Judith Weinstein-Lloyd其他文献
Judith Weinstein-Lloyd的其他文献
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{{ truncateString('Judith Weinstein-Lloyd', 18)}}的其他基金
SGER: Peroxide Measurements during the Milagro Campaign
SGER:Milagro 活动期间的过氧化物测量
- 批准号:
0623859 - 财政年份:2006
- 资助金额:
$ 4.24万 - 项目类别:
Standard Grant
RUI: The Chemistry of Atmospheric Peroxides
RUI:大气过氧化物的化学
- 批准号:
9414108 - 财政年份:1995
- 资助金额:
$ 4.24万 - 项目类别:
Continuing Grant
RUI: The Chemistry of Atmospheric Peroxides
RUI:大气过氧化物的化学
- 批准号:
9112698 - 财政年份:1991
- 资助金额:
$ 4.24万 - 项目类别:
Continuing Grant
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 - 财政年份:1989
- 资助金额:
$ 4.24万 - 项目类别:
Standard Grant
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