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Indoor Plants can Reduce Formaldehyde Levels
The sources of the toxic gas formaldehyde are building materials including carpeting, curtains, plywood, and adhesives.
As it is emitted, it deteriorates the air quality, which can lead to 'multiple chemical sensitivity' and 'sick building syndrome', medical conditions with symptoms such as allergies, asthma, and headaches.
The prevalence of formaldehyde and other volatile organic compounds (VOC) is greater in new construction.
In the study, lead author Kwang Jin Kim of Korea's National Horticultural Research Institute compared the absorption rate of two types of houseplants, Weeping Fig (Ficus benjamina) and Fatsia japonica, an evergreen shrub.
During the study, equal amounts of formaldehyde were pumped into containers holding each type of plant in three configurations: whole, roots-only with the leafy portion cut off, and aerial-only, with the below-ground portion sealed off, leaving the stem and leaves exposed.
The results showed the combined total of aerial-only and roots-only portions was similar to the amount removed by whole plants.
Complete plants removed approximately 80 percent of the formaldehyde within 4 hours.
Control chambers pumped with the same amount of formaldehyde, but not containing any plant parts, decreased by 7.3 percent during the day and 6.9 percent overnight within 5 hours.
As the length of exposure increased, the amount of absorption decreased, which appeared to be due to the reduced concentration of the gas.
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