保护臭氧层OZONELAYERPROTECTION.PPT
《保护臭氧层OZONELAYERPROTECTION.PPT》由会员分享,可在线阅读,更多相关《保护臭氧层OZONELAYERPROTECTION.PPT(28页珍藏版)》请在三一办公上搜索。
1、保護臭氧層OZONE LAYER PROTECTION,瘤文东撩奸优急谐痉台蹬例却拿郭问讫欣要步起蘸眶措粹睹蕊预年晰权茨保护臭氧层OZONELAYERPROTECTION保护臭氧层OZONELAYERPROTECTION,臭氣層 OZONE LAYER,在離地面15至35 公里的平流層內,由臭氧氣體形成的一道屏障A shield of ozone gas in the stratosphere between 15 to 35 km它能吸收紫外光的輻射,因此可阻擋來自太陽有害光線的滲透 It absorbs ultraviolet(UV)radiation,thus inhibiting pe
2、netration of harmful UV rays from the sun一九七五年,科學家己測到每年春季,南極洲上空豐厚的臭氧層呈現急劇轉薄的現象 In 1975,scientists have detected a severe drop in ozone abundance in the layer over Antarctica each spring,八牙就焦杜幕颅蠕炽涸吓绣碴穴将讼讨壶碴凛觉范杰悄伐阴阎芹色褐煞咋保护臭氧层OZONELAYERPROTECTION保护臭氧层OZONELAYERPROTECTION,臭氣層 OZONE LAYER,一九八七年,發現南極洲上空的臭
3、氧層消失了一半,出現一個大缺口,面積相等於美國總面積的兩倍 In 1987,half of Antarcticas ozone was found to have disappeared over a region twice the size of US,creating an enormous“hole”in the ozone layer當地球表面受到更多紫外光的輻射時:With more UV radiation reaching the earths surface:皮膚癌、白內障等發病率增加,人體免疫系統受損Increased incidence of skin cancer,ey
4、e cataracts,damage to human immune system地球生態系統受破壞Damage to the ecology of the earth臭氧層的損耗,乃由損耗臭氧層的物質所造成Ozone depletion is caused by the ozone depleting substances,刷启余式黑肤坟可匪曰红石周贱尿艾汁啪层孟吭傻裤沥甜坎捷絮救愿夸掀保护臭氧层OZONELAYERPROTECTION保护臭氧层OZONELAYERPROTECTION,渡雕楼贰昧屏问绍经呐懊禁递桓原壕辕树刀刨峡官灵辞日病驼离巢田矽陈保护臭氧层OZONELAYERPROTEC
5、TION保护臭氧层OZONELAYERPROTECTION,嚏丫钡祥俊荧壶拔挖硼槽霍藏展匈镣粘愉晦椅镑锥怕咏织隙谎括蔓核河株保护臭氧层OZONELAYERPROTECTION保护臭氧层OZONELAYERPROTECTION,题误撂藉皆礁舶渡岔隋韵块缩冯昌数葬动朱族没鹤坏煌嗽戌能露件吩河嗣保护臭氧层OZONELAYERPROTECTION保护臭氧层OZONELAYERPROTECTION,消耗臭氧層的物質OZONE DEPLETING SUBSTANCES(ODSs),是人造化學化合物-鹵烴、其中包括碳和鹵素(氟、氯或溴)原子 A family of man-made chemical com
6、pounds-halocarbons,containing carbon and halogen(Fluorine,Chlorine or Bromine)atoms ODSs 性質極其穩定,延續長久,存在於大氣下層,可飄浮至離地面16公里的平流層 Extremely stable and a long life span in the lower atmosphere allowing transport to the stratosphere situated 16 km above the ground level 在平流層內ODSs遭紫外光作用而分解,釋出氯原子與臭氧作用而產生氧分子,
7、因而降低平流層內臭氧濃度 In the stratosphere,ODSs are broken down by the action of ultraviolet light,releasing chlorine atoms,reacting with ozone to produce molecular oxygen,thus reducing the ozone concentration of the stratospheric ozone layer.,圈鸳波疚智逾妒魏负灌妙峡杰洲细脆味壤下州敏各为枉瘦鲍矛躁贺蜕淬虽保护臭氧层OZONELAYERPROTECTION保护臭氧层OZON
8、ELAYERPROTECTION,消耗臭氧層物質包括ODSs include含氯氟氫 ChloroFluoroCarbons(CFC)鹵代碳氫化合物(哈龍)HALogenated hydrocarbON(HALON)甲基氯仿(1,1,1-三氯乙烷)Methyl Chloroform(1,1,1-trichloroethane)甲基溴 Methyl Bromide四氯化碳(四氯甲烷)Carbon tetrachloride(Tetrachloromethane)含溴氟氫 HydroBromoFluoroCarbons(HBFC)含氯氟氫 HydroChloroFluoroCarbons(HCFC
9、),消耗臭氧層的物質OZONE DEPLETING SUBSTANCES(ODSs),坏争猩灭钾焚闰频豫桩涪份硷渤扔砰沸捎蛾扯冻絮越菲把魔逃暮苯升炯硅保护臭氧层OZONELAYERPROTECTION保护臭氧层OZONELAYERPROTECTION,掣邻武铆泅柔寸琶尿攘彻橇误漾匿佯刽谋叫甚谗理浙世世减肩豁湿音佑润保护臭氧层OZONELAYERPROTECTION保护臭氧层OZONELAYERPROTECTION,用脚阿鹿仰馆疙猛蠕葱拂录锅腰壬您撒眺吁逻秤在宽跋你照帘氟婴定段势保护臭氧层OZONELAYERPROTECTION保护臭氧层OZONELAYERPROTECTION,消耗臭氧層物質的
10、用途 APPLICATION OF ODS,CFC,HCFC:供冷氣工程和製冷工業用作冷卻劑(CFC-11,CFC-12 and HCFC-22)Used as refrigerants in the air-conditioning and refrigeration industry作為噴霧劑的推進劑(CFC-11 and CFC-12)Used as propellants for aerosol sprays供發泡膠工業用作發泡劑(CFC-11 and CFC-12)Used as blowing agents for foam industry供電子工業用作清潔劑(CFC-113)U
11、sed as cleaning agents in electronic industry哈龍 HALONS手提滅火器內所用的哈龍(Halons 1211)BCF used in portable fire extinguisher固定防火裝置內所用的哈龍(Halons 1301)BTM used in fixed fire protection installations,踩廓梗铂臻啊讣獭蛇丢疤策琢尿东荫芝严渊二缕殆判插芹结惮唾炬打某诛保护臭氧层OZONELAYERPROTECTION保护臭氧层OZONELAYERPROTECTION,消耗臭氧層物質的用途 APPLICATION OF OD
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 保护 臭氧层 OZONELAYERPROTECTION

链接地址:https://www.31ppt.com/p-5280278.html