bio chapter 9-pollution

8/17/2019 Bio Chapter 9-POLLUTION

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CHAPTER 9 :

DYNAMIC ECOSYSTEM

by :• MUHD YAQRIB BIN YAACOB• EUNICE SHANTINI A/L SELVARAJOO• ANNAS MAWADDAH BINTI MAZLEE•

SYAHIRAH ATIKAH BINTI MOHDSOBRI

• NOR NAJWA NAJIHAH BINTI MDNADZRI


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Introduction :

What is water o!!ution"

WATER PO##$TIONis the contamination of water bodies (e.g. lakes,rivers, oceans) . This form of environmental

degradation occurs when pollutants are directly orindirectly discharged into water bodies withoutadequate treatment to remove harmfulcompounds.


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CA$SES O% WATERPO##$TION


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TAE O%SO$RCES '

PO##$TANTSAND E%%ECTS

O% WATERPO##$TION


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• Addition of oygen not su!cient to support

life• Addition of oil destroys life by reducing

oygen and catching "ne , destroyingecosystem

•

#educe reproduction rate of animals• $mbalance created in secondary food chains

• #educe activity of immune system

ECT O% WATER PO##$T


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t t


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ntro uct on :

What iseutrohication"

Eutrohication• is the process whereby a body of water

become rich in dissolved nutrients(nitrates or phosphates) either naturally

or due to human activities.• The increase nutrient promote rapid

growth of algae when they aredeposited in lake, rivers .

• The ecessive growth of algae is often


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THE SE,$ENCE O%

E$TROPHICATION


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The amount of oygen taken up by themicroorganism that decompose organic wastematter in water .

&'' * +

• As a measure of certain types of organic

pollutants in water .• -easure the level of water pollutant

• $ndicates the presence of microorganism

which suggest a level of pollution .

&IOCHEMICA# O-Y.EN

DEMAND /&OD0


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Ther*a! o!!utionis the release of ecessive heat into the

environment.

Introduction :

What is ther*a!

o!!ution "


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• -any factories, electric power stations andnuclear reactors are built near rivers or laketo facilitate the supply of water as a cooling

medium for the machines..• The river or lake water is recycled through a

cooling condenser system and channelledback to the river or lake, thereby raising thetemperature of the aquatic environment.

• This causes the average temperature ofwater to rise above the normal value.

E1!anation :


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DIA.RAMMATICPRESENTATION O%

THERMA# PO##$TION


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hange in composition of thespecies living in habitat

$ncreases the rate ofdecomposition of organismwhich will in turn, increasethe + of water .

-ay contribute to algae

bloom

ygen dissolved in waterdecreases.

E%%ECT O% HEAT ON A,$ATIC #I%E


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This /011 thermal image ofthe 2udson #iver highlightstemperature changes

caused by discharge of 3.4billion gallons of water eachday from the $ndian 5ointpower plant. The plant sitsin the upper right of thephoto 6 hot water in the

discharge canal is visible inyellow and red, spreadingand cooling across theentire width of the river.

Two additional out7owsfrom the 8ovett coal9"red

power plant are also clearlyvisible against the naturaltemperature of the water, ingreen and blue.


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ooling ponds, man9made bodies ofwater designed for coolingby evaporation, convection, and

radiation ooling towers, which transfer waste

heat to the atmosphere throughevaporation and:or heat transfer

ogeneration, a process wherewaste heat is recycled for domesticand:or industrial heating purposes

CONTRO# O% THERMA#PO##$TION


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THE%$T

$RE

ISNOW


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THEEND

bio chapter 9-pollution

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