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State what is water purification
Identify the methods of water purification
Suggest which method is most appropriate
Link appropriate methods the given situations
Discuss limitations of distilling
Work in groups to present method of purifying
using creative ways
What is water purification?What is water purification?
Water purification is the transition of dirty
harmful (Contaminated) water into clean safe
WHY PURIFY WATER?WHY PURIFY WATER?
We purify water to get rid of contaminants that
can be detrimental to our health.
What Is Water Purification?What Is Water Purification?
Water purification generally means freeing water
from any kind of impurity it contains, such as
contaminants or micro organisms.
Water purification, or drinking water
treatment, is the process of removing
contaminants from surface water or
groundwater to make it safe and palatable for
Methods of purifying WaterMethods of purifying Water
Which Method is Appropriate?
There are various methods of water
purification and filtration, some more effective
at removing certain types of contaminants
Which Method is Appropriate?Which Method is Appropriate?
Whilst there are contaminants in every water
supply, the methods of water purification and
filtration you'll use will depend on 3 things:
(1) the state of your local water supply;
(2) the cost and performance of the filtration unit
(3) their health-benefits.
The general advice is to boil all water for 5-10
minutes plus 1 minute for every 300m above sea
level, up to around 5500m where boiling becomes
Some home water filtration
systems can remove chemical
contaminants for example,
but fail to effectively remove
(bacteria) from your water
supply. Therefore, these are
not "purifiers" in the true
sense of the word.
Of all the methods of water
purification and filtration,
distillation is considered in
some quarters to be the
It removes the widest variety
of contaminants such as
salts, chemicals, bacteria
and other micro-organisms
from your water supply.
limitations of Distillinglimitations of Distilling
Produces flat tasting water that is stripped
of the trace minerals that your body needs.
Some doctors contend that this can lead to
multiple-mineral deficiencies within the body.
However some experts contend that most of the
bodies mineral needs are met through eating
food, not drinking water. Therefore the effect of
de-mineralized water on the body is still being
Chlorinating/ ChlorinationChlorinating/ Chlorination
Super-chlorination. This uses
a high dose of chlorine but
later neutralizes it using
hydrogen peroxide, and is
Chlorine tablets. Used alone
these won't protect against
Guardia. Instead use a fine
filter and half a tablet.
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Wiki water purificationWiki water purification
Methods of purificationMethods of purification