Env chemistry 11 sci
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Transcript of Env chemistry 11 sci
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G
17 ENVIRORNMENTAL CHEMISTRY
SHRI.VIDHATE G.B.
M.SC.B.Ed
( ORG.CHEMISTRY)
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ENVIRORNMENT MEANS ALL
THAT ENVIRORNS (
SURROUNDS ) US.
ELEMENTS OF ENVIRORNMENT
ENVIRONMENT
NON-LIVING
LIVING
ATMOSPHERE HYDROSPHERE LITHOSPHERE
BIOSPHERE
INTRODUCTION
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ENVIRORNMENTAL POLLUTION
ENVIRORNMENTAL POLLUTION MEANS
POLLUTION OF THREE SEGMENTS
AIR(ATMSPHERE),LAND(LITHOSPHER
E) & WATER(HYDROSPHERE).
POLLUTION :- POLLUTION MEANS
UNWANTED CHANGES IN OUR
SURROUNDING THAT HAVE ADVERSE
(HARMFUL)EFFECTS ON
ANIMALS,PLANTS & HUMAN BEINGS.
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1. RAPID INDUSTRIAL & TECHNOLOGICAL DEVLOPMENT.
2. MANUFACTURING OF DRUGS,ANTIBIOTICS,DYES,AGROCHEMICALS.
3. EXESSIVE USE OF FERTILIZERS & PESTICIDES FOR AGRICULTURE.
4. DEVLOPMENT OF ATOMIC & NUCLEAR ENERGY WHICH RELEASE TOXIC RADIOACTIVE MATERIALS INTO ENV.
5. RELEASE OF TOXIC GASES,CHEMICALS BY PRODUCT FROM CEMENT,SUGAR,DISTILLERY,DRUGS,PAPER,THERMAL & NUCLEAR POWER
RESPONSIBLE INGREDIENTS FOR POLLUTION
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ATMOSPHERE ARE SPRADE FROM EARTH SURFACE TO
UPTO 500 KM .
APPROX.MASS OF ATMOSPHERE IS 4.5 TO 5 X 10 15.
ATMOSPHERIC POLLUTION
REGION HEIGHT IN
KM
TEMP OF
REGION
MAIN
CONSTITUE
NTS
TROPOSPHERE 0—11 15 TO -56 O2 , N2 , CO2
, H2O
STRATOSPHER
E
11—50 -56 TO -2 O3
MESOSPHERE 50—90 -2 TO -92 O2+ , NO+
THERMOSPHE
RE
90—500 -92 TO -1200 O2+ , O+ ,
NO+
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Green house effect
:-
The heating earth
up of the earth
surface by co2
layer in the
atmosphere is
called green house
effect
GLOBAL WARMING & GREEN HOUSE EFFECT
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Green house effect
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SOME MAJOR GREEN HOUSE GASES & THEIR SOURCES
GAS SOURCES
CARBON DIOXIDE (CO2) Fossil fuel combustion (coal,oil,natural gas)
Deforestation & land use changes
METHANE (CH4) Enteric fermentation in cattle & insects
Biomass burning & garbage land fills
Leakage of gases from coal mines & natural
gas
Rice paddies
Swamps & tundra
CHLORO FLUORO CARBON (CFC) Plastic foams
Refrigeration & air-conditioning
Aerosols(spray propellants)
Industrial solvents
NITROUS OXIDE (N2O) Fertilizers use
Fossile fuel combustion
Biomass burning
Changing land use
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EFFECT OF CLIMATE CHANGE
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CAUSES OG GLOBAL WARMING
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THANK YOU FOR TODAY