G

17 ENVIRORNMENTAL CHEMISTRY

SHRI.VIDHATE G.B.

M.SC.B.Ed

( ORG.CHEMISTRY)

ENVIRORNMENT MEANS ALL

THAT ENVIRORNS (

SURROUNDS ) US.

ELEMENTS OF ENVIRORNMENT

ENVIRONMENT

NON-LIVING

LIVING

ATMOSPHERE HYDROSPHERE LITHOSPHERE

BIOSPHERE

INTRODUCTION

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.

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

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+

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

Green house effect

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

EFFECT OF CLIMATE CHANGE

CAUSES OG GLOBAL WARMING

THANK YOU FOR TODAY