The Efficiency of Air Filters and Household Items in Purifying Polluted Air
Christine Jang, Henry Huang
Eric Hamber Secondary
Floor Location : S 081 V

The purpose of this experiment is to determine the efficiency of the household items as well as the air filters in purifying the air.

Three different types of air filters: Honeywell Pre-Filter
Honeywell HEPA Filter
Carbon Filter
Arm & Hammer Wipes
Calligraphy Paper
Paper Towel
Tissue Paper
Static-Matic Electrostatic Cloths
Laundry net
Water bottles
Electrical Power Source
Hot Glue Gun
Blue Litmus paper
Red Litmus Paper
pH 1-14 Pad Test Strips
Handkerchief (fabric)

Firstly obtain a sealed device capable of electrolysis of water
The airtight seal on the electrolysis device is important as it is required to maintain the composition of the air sample being tested.
Add the air being tested to the electrolysis device
use electrolysis, to react the molecules present in the air, With the newly produced hydrogen and oxygen gases.
Stop the electrolysis, after about fifteen to twenty-five minutes, depending on the voltage, charge, and heat used for the electrolysis.
Cool the entire device and Collect the resulting solution
Test the pH of the solution using a variety of pH indicators and measuring devices

Among the filters, carbon filter was the most useful filtering device for carbon dioxide gas. Both HEPA filters and pre-filters are highly effective. However, carbon filter showed higher efficiency in filtering carbon dioxide gas, as well as providing a fresher smell indicating that the air is purified. For the household items, electrostatic cloths were more efficient than any other items that were tested. Both the paper towels and the calligraphy paper worked effectively. In contrast, the success of the paper towels and calligraphy paper may be attributed to the fact that, the materials make air passage harder, rather than true filtering. In conclusion, carbon filters and electrostatic cloths are the most practical products when filtering carbon dioxide gas.