Comparison of air-purification characteristics for potted Golden Hahnii and Warneckii

摘要

Golden Hahnii and Warneckii are two kinds of small foliage plants that have a healing effect on humans. These potted plants also have the capability to purify not only air pollution but also soil and water pollution. In this paper, the air purification capability is examined using a tin oxide gas sensor. The resistivity of the sensor decreased in polluting gases, which are kinds of reducing gases. As for the results these potted plants have a high capability to formaldehyde, xylene and toluene. Warneckii had a higher capability than that of Golden Hahnii. Golden Hahnii is one of the succulent plants and its capability is lower than non-succulent plants. It is, however, obvious that the capability becomes higher at night even if the intensity of light is low. Most of the stomata open at night and take in carbon dioxide, and the plant organ produces a malic acid. Consequently, it is thought that the plant has a higher purification capability in darkness. A purified indoor air environment can be created in both the night and day, when the succulent and non-succulent plants are installed together.