3大气环境污染与防治（Air pollution and prevention and control）.docVIP

3大气环境污染与防治（Air pollution and prevention and control） Chapter iii air pollution and prevention and control We cant live without the air, just as fish cant live without water. Orders to record Section 1. Composition and structure of atmosphere Section 2. Air pollution (source, substance, type, hazard) Section 3 control of air pollution (four countermeasures) Section 4. Global atmospheric environment Composition of the atmosphere 1, N2, O2, etc 3. Ice crystals and solid particles (such as dust and pollen) 2. Water droplets (such as cloud droplets and fog drops) The air without water vapor and suspended matter is called dry clean air The first atmospheric overview Height (km) 2. Stratification of atmosphere Every rise of 100 m, the temperature decrease 0.65 ℃ N2 O2 Ar CO2 Ne He Kr The H2 Xe O3 layer The more you go up, the more atoms you have The intensity of uv radiation, N2 and O2 produce different degrees of dissociation Here are some atmospheric ingredients associated with environmental problems Carbon dioxide: source: respiration, combustion and decomposition of organisms. Status: there is a growing tendency in the atmosphere. Influence: intense absorption of the ground radiation, causing the greenhouse effect intensification. Ozone: source: high altitude through photochemical action, low air through lightning or organic oxidation and high altitude transmission. Function: absorbs the suns ultraviolet ray greatly, causes the ground life to protect from excessive ultraviolet ray burn. Distribution: there is very little content in the natural atmosphere. It varies with height and latitude and time. Water vapor: Marine and ground evaporation and plant transpiration. Distribution: varies greatly over time and place. In direct direction, generally decreases with height. Influence: cloud, fog, rain, snow and other atmospheric phenomena. It has important influence on the growth and development of biology. Particles: types: solid particles and liquid particles. Influence: i