Kisele kise vasileski, bodrožić i živanović
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Transcript of Kisele kise vasileski, bodrožić i živanović
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KISELE KISEKISELE KISEKISELE KISEKISELE KISE
Radile: Jelena Vasileski, Mirjana Bodrozic i Teodora Zivanovic
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Vazduh• Vazduh je smesa gasova cestica i vodene
pare koji se nalaze u stabilnoj ravnotezi.• Sadrzaj vazduha:• 78% azota• 21% kiseonika• 0,03% CO2• 0,97% ostalih gasova
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Izvori zagadjenja vazduha
• Prirodni zagadjivaci (prirodni pozari, vulkanske erupcije)
• Vestacki zagadjivaci (covek, industrija, saobracaj i termoelektrane)
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Stetne materije (zagadjivaci)
• Ugljen-dioksid• ugljen-monoksid• Sumfo-dioksid• Oksidi azota• Cadj• Pepeo
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Nezagadjena kisa
• Nezagađenakiša je po prirodi kisela jer atmosfera sadrži u sebi kiseli oksid ugljen-dioksid (CO2) koji se rastvara u vodi (kapima kiše) i daje kao produkatugljenu kiselinu što ima za posledicu da je kiselost(pH) kišnice oko 5,6.
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Losi primeri• Najniza vrednost pH kisnice u SAD-
u bio je 2,1..• U Evropi pH kisnice bio je 2,4 u
Skotskoj 1974• U Srbiji pH dostize izmedju 2 i 3
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Kako nastaje kisela kisa
• Zagadjujuce materije stupaju u hemiske reakcije sa vodenom parom kada dodju u atmosferu I nastaju opasna jedinjenja (sumporna kiselina, azotna kiselina) koja u vidu kisa pada na zemlju
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Posledice kiselih kisa• Susenje suma• Unistavanje zemljista• Ugrozavanje biljnih I zivotinskih
vrsta• Unistavanje spomenika, fasada i
betona
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Mere za zastitu vazduha
• Eliminacija izvora zagadjenja • Smenjenje zagadjujucih materija• Posebne mere za zastitu vazduha
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Zanimljivosti• Sumpor koji sadrze kisele kise
može biti koristan u ublažavanju posledica globalnog zagrevanja.
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Posledice kiselih kisa