Read 6 year old Chinmayi’s water purification science fair project abstract that she did to find out why she got sick from being in a river in India it.
During my vacation, I went to my native place. There is a big river near my house, I enjoyed it a lot. When I returned back to Mumbai, I felt ill. Doctor’s told me that I had water infection, due to change in water, The village water seemed to be dirty compared to city water.
The water was polluted because people were using the rivier water for washing clothes, utensils bathing, cleaning cattle etc. This polluted water could be purified if alum or boiling water had been used to to kill the germs.
I thought of using alum to see how it works in water purification. To added impurities to clean the water, and then used alum. It was observed that the impurities settled to the bottom thus cleaning the upper layer.
To purify the dusty impure water using different methods, like cloth and sand filtration, use of alum and mainly by boiling.
Water is a common substance that is very essential to all known forms of life. Without water no living forms can exist.
a) Water is tasteless, odorless liquid.
b) Water is transparent
c) Water is primarily a liquid
However, water is being polluted by various ways such as:
1) Discharging domestic water & Industrial wastage in the water bodies.
2) Washing of cattle, utensils, clothes near the river banks etc.
This polluted water needs to be treated before put to use. Water treatment describes a process used to make water more acceptable for a desired use these can include use such as drinking water in industrial processes and many other uses.
Water purification is the removal of contaminants from the untreated water to water to produce clean water that is pure enough to be used for to other purposes.
Substances that are removed during the process of drinking water treatment include germs, mud, and man made pollutants.
In water purification the two basic methods such as cloth filtration and sand filtration does not clean water efficiently but the use of alum and boiling of water clean water more efficiently.
1. Dusty impure water
2. Four Transparent plastic jars (namely A, B,C,D)
3. Three plastic tubes (connecting jars)
4. Three nobes
5. Filter cloth
6. Coarse and fine sand particles
8. Jar for boiling water
1. First connect all the four transparent jars using tubes.
2. Jar ‘A’ is covered with a filter cloth.
3. Jar ‘A’ and Jar ‘B’ are filled with coarse and fine sand particles for about 1- 1.5 inches respectively.
4. Jar ‘C’ is used for alum.
5. Jar ‘D’ is used for clean water.
6. After the instrument is being set up, allow the impure water to flow through the different jars.
7. Wait for an hour for the purification to take place.
8. Boil the water obtained from the last jar for about 20 minutes in a boiling
The cloth and sand filtration, filters the big and small substances or impurities in the water.
Use of alum helps to settle down the impurities and thus helps in removing the turbidity form the water thus making it clear in appearance. The last stage of purification i.e. boiling cleans water more effectively.
The various methods such as cloth filtration, sand filtration, use of alum and boiling are being used for water purification. However, there are many other methods such as chlorination and distillation which could also be used.
Distillation is a method in which water in the nature is purified.
I am thankful for all the guidance and support that I have got from parents, teachers, elders. My Parents have always being encouraging me and inspiring me to keep doing a better job every time.
Gathered lot of additional information and explanation from my elders, teachers and certain science based books.
1. “British Council Library, Mumbai, India”.
2. “Explore and Learn Science and Technology” (Vol.2)
3. Science Text Books (Std. IX & X)
4. Internet (need specific sites