The presentation topic is water pollution. The document defines water pollution as contamination of water that generally refers to adverse changes in water quality resulting from human activities. It discusses various causes and sources of water pollution including industrial waste, sewage, surface water runoff and atmospheric deposition. The effects of water pollution on organisms and ecosystems are also outlined. Methods for treating and preventing further water pollution are presented, including conserving water usage, proper disposal of chemicals and litter, and planting more vegetation to reduce runoff.

1. Our presentation topic
IS

2. Contents
Introduction
Properties of water
Definition of Water Pollution
Causes & Sources of Water Pollution
Effects of Water Pollution
Treatment & prevent of Water pollution
Quick Facts
Conclusion

3. Introduction
Comprising over 70% of the Earth’s surface,
water is undoubtedly the most precious natural
resource that exists on our planet. Without the
seemingly invaluable compound comprised of
hydrogen, life on earth would be non-existent: it
is essential for everything on our planet to grow
and prosper. Although we have humans
recognize this fact, we disregard it by polluting
our rivers, lakes and oceans. Subsequently, we
are slowly but surely harming our planet to the
point where organisms are dying at a very
alarming rate.

5. Definition of Water Pollution
 Water pollution is the contamination of water.
This generally refers to the adverse changes in
water quality. This generally refers to the
adverse changes in water quality, usually as a
result of human activities.
 The substances that cause water pollution are
called pollutants.

6. Kinds of water pollution

8. Other Sources of Water Pollution
Surface water pollution
Underground water pollution
Oxygen depletion pollution
Nutrient pollution
Microorganism pollution
Chemical pollution
Suspended matter pollution

9. Other Sources of Water Pollution
Industrial waste pollution
Radioactive waste pollution
Oil pollution
Atmosphere and water pollution
Air pollution
Sewage and waste water pollution
Marine dumping pollution

12. Oxygen Depleting
 Microorganisms that live in water feed on
biodegradable substances. When too much
biodegradable material is added to water, the
number of microorganisms increase and use up
the available oxygen. This is called oxygen
depletion.

19.  Potassium is a radioactive element, which metal reacts very rapidly with
water to form a colorless solution of potassium hydroxide (KOH) and hydrogen
gas (H2).
2K(s) + 2H2O → 2KOH(aq) + H2(g)

23. Effects of water pollution

29. TREATMENT
OF
WATER
POLLUTION!
!

34. How do we prevent water
pollution
 Conserve water by turning off the tap when running water is
not necessary. This helps prevent water shortages and
reduces the amount of contaminated water that needs
treatment.

35. How do we prevent water
pollution
 Be careful about what you through down your sink or toilet.
Don’t throw paints, oils or other forms of litter down the drain.

36. How do we prevent water pollution
 Use environmentally household products, such as washing
power, pesticides and fertilizers. This will prevent runoffs of
the materials into nearby water sources.
 By having more plants in your garden you are preventing
fertilizer, pesticides and contaminated water from running
off into nearby water sources.

37. How do we prevent water
pollution
 Don’t through litter into rivers, lakes or oceans. Help clean
up any litter you see on beaches or in rivers and lakes,
make sure it is safe to collect the litter and put it in a nearby
dustbin.

43. References
References
 http://www.webelements.com/potassium/chemistry.html
 http://www.slideshare.net/rsalonga/water-pollution-powepoint
 https://www.google.com.bd/search?q=chart+of+water+pollution&client=firefox-
beta&hs=C8&rls=org.mozilla:en-
US:official&channel=fflb&tbm=isch&tbo=u&source=univ&sa=X&ei=SYgmVJHdIouQuQSe2oA4&ved=0CC
0Q7Ak&biw=1366&bih=626#imgdii=_
 https://www.google.com.bd/search?q=water+pollution&client=firefox-beta&hs=YsV&rls=org.mozilla:en-
US:official&channel=fflb&tbm=isch&tbo=u&source=univ&sa=X&ei=gokmVM6rJZGUuAT22IDoCA&ved=0
CDQQ7Ak&biw=1366&bih=626
 http://en.wikipedia.org/wiki/Water_pollution

45. ANY
QUESTION