Uptake of Benzene by Indoor Plants and Their Responses to This Pollutant
Date Issued
2007
Date
2007
Author(s)
Yang, Yu-Ting
DOI
zh-TW
Abstract
Volatile organic compounds(VOC) are major indoor air pollutants, especially in urban areas. Benzene is one of the VOCs that can be found everywhere, and is a carcinogen. The purpose of this research, therefore, is to screen the plants with higher absorption rate of benzene. The effects of light intensities and carbon dioxide concentrations on the benzene uptake by indoor plants are also studied.
Seventeen common indoor plants were exposed to 25 ppm of benzene 500 Lux light intensity in a 52-L fumigation chamber. Results show that Philodendron cv. Wend-imbe and Syngonium podophyllum cv. Pixie have the highest uptake rate of benzene, with deposition velocities as 0.14mm/sec and 0.16mm/sec, respectively. In terms of plant classification the Araceae family and Aspleniaceae family show the higher uptake to benzene.
When these 17 plants were exposed to 25 ppm of benzene under strong light of 5000 Lux and weak light of 500 Lux, deposition velocities of 10 plants among them were raised due to higher light intensity. Results also show stomatal conductance of these 17 plants were increased by higher light intensity. Under high light, Philodendron cv. Golden pride, Peperomia clusiifolia, and Philodendron cv. Wend-imbe have the highest deposition velocity, as 0.14mm/sec, 0.14mm/sec, and 0.12mm/sec, respectively. In terms of plant classification, the Piperaceae family and the Araceae family show the higher uptake of benzene.
Two levels of carbon dioxide as 300~400ppm and 600~700ppm, were applied to 8 plants during exposure to benzene under strong or weak light intensity. Results show that at level of 300~400ppm, deposition velocities of benzene by some plants were increased by higher light intensity, while at high CO2 level of 600~700ppm, deposition velocities of benzene by most plants were significantly increased by strong light. Under weak or strong light, however, the doubling of CO2 significantly decrease the deposition
velocity of benzene by all 8 plants.
Subjects
苯
二氧化碳
沈降速率
室內空氣污染
植物淨汙
Benzene
Carbon dioxide
Deposition velocity
Indoor air pollutant
Phytoremediation
SDGs
Type
other
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