Back to Course

JSS1: BASIC SCIENCE - 1ST TERM

0% Complete
0/0 Steps
  1. Introduction to Science | Week 1
    4Topics
    |
    1 Quiz
  2. Family Health | Week 2
    6Topics
    |
    1 Quiz
  3. Family Health (Sanitation) | Week 3
    4Topics
    |
    1 Quiz
  4. Family Health (Nutrition) | Week 4
    8Topics
    |
    1 Quiz
  5. Drug and Substance Abuse | Week 5
    3Topics
    |
    1 Quiz
  6. Environmental Pollution: Air Pollution | Week 6
    3Topics
  7. Soil pollution | Week 7
    2Topics
  8. Water Pollution | Week 8
    4Topics
    |
    1 Quiz
Lesson 8, Topic 4
In Progress

Water Purification

Lesson Progress
0% Complete

Water (rainwater, streams, etc) can be purified by using the following methods:

i. Filtration

ii. Boiling

iii. Adding chemicals

Filtration:

Filtration is the process by which solid particles are separated from liquids. Water is filtered to remove all solid particles (sediments). During filtration, bacteria, as well as other microorganisms, can also be removed.

filtration

Boiling:

This is the process of heating water to its boiling point (i.e the temperature at which water changes to water vapour), which is 100°C. This method is used to kill all micro-organisms present in the water and render them harmless.

boiling water
Boiling water is used to kill microbes and viruses that may be present.

Addition of Chemicals:

This is done by the addition of chlorine to water which is referred to as chlorination. Chlorination is done to kill germs in the water. 

Uses of halogens - chlorine is added to swimming pool to kill bacteria.
Chlorine is used to disinfect swimming pools.

In some industries, the three methods of filtration, boiling, and addition of chemicals are used in water purification. 

Evaluation Questions:

1. List 3 methods of water treatment /purification.

2. List 3 control measures for water pollution.

Responses

Your email address will not be published. Required fields are marked *

back-to-top
error: