大气污染英文原稿ppt课件

1、Air Pollution,definition,Forming condition,Air pollutionproblem,Damage,safeguard,BACK,Air pollution definition,According to the international standard organization (ISO), the definition of air pollution usually refers to human activity or natural process cause certain substances into the atmosphere,

2、 then present a enough concentration, achieve enough time, and endangers the bodys comfort, health and welfare or environmental pollution phenomenon,In the dry and clean atmosphere, to measure the composition of the gas is negligible.But in a certain range of the atmosphere, there are some substance

3、 that no appearing before, the amount and duration of these substance, is likely to produce adverse effect and harm for people, animals, plants and goods and materials. When the concentration of pollutants in the atmosphere reach harmful degree, even destroy the ecological system and human developme

4、nt of normal conditions, cause harm to people or things phenomenon called atmospheric pollution,Reason of air pollution,The cause of air pollution, both natural factors and human factors, especially the man-made factors, such as industrial waste gas, combustion, automobile exhaust and nuclear explos

5、ion. With the rapid development of human economic activity and production, consume a large amount of energy, at the same time, it will output a lot of waste gas, dust material to discharged into the atmosphere, these seriously affect the quality of the atmospheric environment,Particulate matter： Sul

6、fur oxide： Oxycarbide Oxynitride： Hydrocarbon Other hazardous substance,BACK,The blacklist of air pollution,Air pollutionproblem,Greenhouse effect,BACK,Dust -haze,Acid rain,Ozone hole,Fuel contains a variety of complex components, produce all kinds of harmful substances after burning, even excluding

7、 fuel impurities to achieve complete combustion, also want to produce water and carbon dioxide, and because of fuel combustion to the increasing concentration of carbon dioxide in the atmosphere, destroy the balance of the nature of carbon dioxide, that could trigger a greenhouse effect, the earths

8、temperature to rise.Concentration of carbon dioxide in the atmosphere increases, prevent the earths heat loss, can feel the temperature rise in the earth, which became known as the greenhouse effect.Destroy the infrared radiation normal relations between the atmosphere and the ground, absorb the ear

9、th release infrared radiation, like greenhouse, pushing earth temperatures of gas are called greenhouse gases,Greenhouse effect,The greenhouse effect will enable polar ice to melt,Maldives,BACK,PH 5.65,Acid rain,BACK,Taj Mahal,Statue of liberty,Antarctic Pole,Taj Mahal change color,Marble contains a

10、 lot of calcium The taj mahal in India, because of air pollution and acid rain corrosion, marble lose luster, color gradually become rusty,BACK,Statue of liberty,BACK,Acid rain has also a corrosive action on metals, cultural relics., for example, the famous statue of liberty in New York harbor in th

11、e United States, reinforced concrete on thin copper due to acid rain, become loose, so it have to be overhauled,Antarcticpole,BACK,The Great Wall Station houses and tower is rustily into layer peeling, some had to be updated.In order to slow down the corrosion, paint brush 2-3 times every year,Ozone

12、 hole,Ozone hole is due to air pollution, the diffusion and erosion of the aerosol pollutants，especially the nitrogen oxide and halogenated hydrocarbon，caused the destruction and reduction of the atmospheric ozone layer Cant absorb ultraviolet radiation,BACK,Dust-haze,Gray haze, also known as atmosp

13、heric brown clouds, in the ground meteorological observation rules of the China meteorological administration, the ash haze is defined like this: a lot of very small dry dust particles floating in the air evenly, make the horizontal visibility of less than 10 km air turbidity phenomena and make the

14、distance light microstrip yellow, red, make dark microstrip blue,Damage,BACK,一、The harm to human body health Respiratory diseases 二、The harm to industrial and agricultural productionAtmospheric pollutants to the harm of industrial basically has two kinds: one is the atmosphere of acidic pollutants a

15、nd so2, no2, etc., causing corrosion for industrial corrosion of materials, equipment and facilities;2 ash make adverse effects on precision instruments and equipment production, installation, debugging and use .from an economic point of view，Atmospheric pollution to the harm of industrial productio

16、n increase the cost of production, improve the cost and shorten the service life of the product. Air pollution also caused great harm to agricultural production. Acid rain can directly affect the normal growth of plants, and can penetrate into the soil and into the water, causing soil and water acid

17、ification, toxic ingredients dissolution, produce harm to animals and plants and aquatic organisms. Even Serious acid make rain forest decline and make fish to become extinct,三、 the influence of atmosphere and climate Acid rain ozone hole Greenhouse effect,Safeguard procedures,1、Reduce pollutant emi

18、ssions. Reform the energy structure, use more pollution-free energy and low pollution energy, preprocessing of fuel, improve combustion technology, etc all can reduce emissions.In addition, before the pollutants into the atmosphere，use dust smoke abatement technology, condensing technology, liquid a

19、bsorption technology, recycling technology to eliminate parts of the exhaust gas pollution 2、Control emissions and make full use of atmospheric self-purification ability.Different meteorological conditions, the capacity of the atmospheric pollutants is different, if discharge intothe same amount of pollutants, the pollutant concentration is different.For wind, good ventilation, turbulence, strong convection area and time,