| abstract |
PROBLEM TO BE SOLVED: To provide a filter capable of efficiently removing air by removing sulfur-based substances or aldehydes in addition to nitrogen-based substances. The present invention relates to a filter used for purifying air. Carriers 1a, 1 carrying a nitrogen-based substance removing agent, a sulfur-based substance removing agent, and an aldehyde-removing agent. A filter is formed by b and 1c. Nitrogen-based substances, sulfur-based substances, and aldehydes in the air, which are odor-causing substances, can be simultaneously removed to purify the air. |