Abstract: Activated carbon has many advantages, such as wide source of raw materials, low cost, simple and mature production process, flexible use and so on, making it promising applications. Formaldehyde has always been the difficulty and focus of indoor air purification. Being in an environment containing formaldehyde for a long time will affect the physical and mental health of human beings. The activated carbon can effectively remove indoor formaldehyde and reduce the cost of air purification. Therefore, activated carbon is used to treat various indoor enviro-nments. In this paper, the types of activated carbon and the removal mechanism of indoor formaldehyde are introduced in detail. The effects of the characteristics of activated carbon raw materials, modification methods and enviro nmental conditions on formaldehyde removal are discussed respectively. The existing limitations and problems to be solved are pointed out, and the prospect of using activated carbon to remove formaldehyde at room temperature in the future is presented.
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