Study on The Effect of Plant Wall on Indoor CO2

A quantitative study on the absorption capacity of CO2 by plant wall was carried out to determine the effect of plant wall on indoor CO2. The effect of plant wall on change of indoor CO2 concentration was monitored through the simulation of CO2 release rate of human body in rooms, and its influencing factors were also discussed. The results indicated that under suitable conditions 4 m(2) plant wall could absorb 5.66g CO2 per hour on average in a room of 54 m(3), which decreased indoor CO2 growing rate by 18%. The effect of plant wall on indoor CO2 was mainly related to the photosynthesis and respiration of plants, and microbial respiration of plant roots, which was influenced by temperature and humidity and light intensity. Microbial respiration can offset some of the CO2 uptake by plants. Maintainning appropriate environmental temperature and humidity to inhibit microbial growth, and increasing light intensity moderately can help improve absorption effect of CO2 by plant wall, then improve indoor air quality.