API 4193-1973
光化学气溶胶的形成和组成机制

MECHANISMS OF FORMATION & COMPOSITION OF PHOTOCHEMICAL AEROSOLS

非常抱歉，我们暂时无法提供预览，您可以试试： 免费下载 API 4193-1973 前三页，或者稍后再访问。

您也可以尝试购买此标准，
点击右侧 “购买” 按钮开始采购（由第三方提供）。

注意： 点击下载后，生成下载文件时间比较长，请耐心等待......

标准号

API 4193-1973

发布

1973年

发布单位

API - American Petroleum Institute

当前最新

API 4193-1973

 

 

适用范围

Introduction One of the major problems confronting modern civilization is the continuing degradation of air quality in major urban complexes. An Important symptom of air pollution is the Increased concentration of airborne particulates over cities@ resulting in increased health hazards@ decreased visibility@ and corrosive destruction of property. The formation of aerosols by man's activity is perhaps the most easily identified manifestation of air pollution. However@ the details of the mechanisms of formation of airborne particles and their evolution and removal from the atmosphere@ remain poorly understood despite considerable effort devoted to this subject. A number of years ago@ workers recognized that aerosol particles could appear in the atmosphere via two different routes. The first involves primary emissions from sources such automobile exhaust@ or smokestacks. The other Is secondary in nature@ where particles are produced by physicochemical processes in the atmosphere itself. The possibility of chemical aerosol formation was probably first demonstrated by Tyndall in the 19th century.The significance of such a mechanism for removal of reactive trace gases from the atmosphere has not been fully appreciated until recently. There is mounting evidence that the formation of aerosols by photochemical reactions in the atmosphere plays a significant local role in air pollution over many cities. In fact@ the formation of a haze of such suspended material is an integral part of photochemical smog. It was recognized in the classical work on smog reactionsthat aerosols would form in photochemical1y reactive atmospheres containing hydrocarbon vapors@ water vapor@ and nitrogen oxides. More recent studies In smog chambers have elucidated the relation between SO2 and photochemical aerosol formation. Other work@ such as that of Bricard et al. and Goetz and coworkers@ have indicated that significant gas-particle interactions take place in air containing pollutant gases Irradiated by sunlight.

API 4193-1973相似标准

推荐

API 4193-1973 中可能用到的仪器设备