Study on Role of Common Trees for Absorbing the Odor Pollutions Ammonia and Hydrogen Sulfide
Date Issued
2011
Date
2011
Author(s)
Chong, Kin-San
Abstract
Hydrogen sulfide, ammonia, organic sulfur, and organic amines are major odor pollutants. They are offensive and uncomfortable for people. In this study, both ammonia and hydrogen sulfide were selected and tested for measuring the pollutant uptake rates by common tree species and future application in the field. A small fumigation chamber was designed for measuring the uptake rate of ammonia and hydrogen sulfide by 20 species of common trees. Results showed that among then Melia azedarach, Eucalyptus citriodora, Tamarix juniperina, Melaleuca leucadendra and Hibiscus tiliaceus have higher for ammonia. To uptake the hydrogen sulfide, however, Melaleuca leucadendra, Hibiscus tiliaceu, Eucalyptus citriodora, Melia azedarach and Araucaria excels showed the higher uptake rate. Four species can be found in both lists and are worthy for planting in the field to remove both ammonia and hydrogen sulfide simultaneously. The pollutant uptake measurement for four indoor plants showed that Asplenium antiquum do the best for ammonia, while the highest uptake of hydrogen sulfide is by Ficus pumilal. To compare the effects of light intensity and biological clock on pollutant uptake by plants, we measured the uptake rate of ammonia and hydrogen sulfide under low or high light either in the morning, afternoon, or evening. Results indicated that the uptake rate of ammonia and hydrogen sulfide were increased significantly in high light intensities (5000 lx) than in low light intensity (500 lx), whenever in the morning, afternoon and evening. Because of circadian rhythm, or so called biological clock, the uptake rates of ammonia and hydrogen sulfide by plants usually decreased from in the morning, to a less in the afternoon, and the least in the nighttime.
Subjects
odor pollutant
ammonia
hydrogen sulfide
deposition velocity
phytoremediation.
SDGs
Type
thesis
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