Evaluation on the Efficiency of Pollutant Removal Rate based on Aquatic Plant Growth. So-Hee Lee Department of Science Education, Graduate School of Education, Kumoh National Institute of Technology Abstract To evaluate pollutant removal capacity of aquatic plants, I picked up 5 different aquatic pl...
Evaluation on the Efficiency of Pollutant Removal Rate based on Aquatic Plant Growth. So-Hee Lee Department of Science Education, Graduate School of Education, Kumoh National Institute of Technology Abstract To evaluate pollutant removal capacity of aquatic plants, I picked up 5 different aquatic plants and let them grow in a lab, checking growth status in a polluted environment and pollutant removal rate along with growth. The results of these experiments are: 1. Aquatic plants grow well compared to control group despite a polluted atmosphere because they have good photosynthesis and a lot of water in them. It means they have the capacity to remove pollutants while growing, and it indicates pollutants are moving smoothly through water exchange. 2. A lot of ion is moving through developed organs such as leaves, stems and roots, according to the various types of plants. By accumulating nitrogen and phosphorus as well as various ions such as Ca, Na, K, Mg in plants themselves, it is very effective to remove pollutants' ion. 3. After letting aquatic plants grow in a lab for 7 days and checking the quality of water, the average COD was 74% and TOC was 62%, which means that aquatic plants have quite an effective removal efficiency. Especially, the rate of removal for TN using Lemna minor was the highest at 87%, and the rate of removal for PO4-P using Hydrilla verticillata was the highest at 25%. Using a water analyzing kit for 16 days, the result of removal rates of nitrogen and phosphorus was that in the first 3 days of growth, nitrogen in Lemna minor was the highest at 78% and phosphorus in Nymphoides indica was rather high at 50%. After 10 days, however, the highest removal rate in both nitrogen and phosphorus is Trapa japonica, which means that there is big difference in the removal period and efficiency according to the types of plants. With this result, it is expected to purify water quality effectively if we use aquatic plants properly according to the pollutants' types and conditions.
Evaluation on the Efficiency of Pollutant Removal Rate based on Aquatic Plant Growth. So-Hee Lee Department of Science Education, Graduate School of Education, Kumoh National Institute of Technology Abstract To evaluate pollutant removal capacity of aquatic plants, I picked up 5 different aquatic plants and let them grow in a lab, checking growth status in a polluted environment and pollutant removal rate along with growth. The results of these experiments are: 1. Aquatic plants grow well compared to control group despite a polluted atmosphere because they have good photosynthesis and a lot of water in them. It means they have the capacity to remove pollutants while growing, and it indicates pollutants are moving smoothly through water exchange. 2. A lot of ion is moving through developed organs such as leaves, stems and roots, according to the various types of plants. By accumulating nitrogen and phosphorus as well as various ions such as Ca, Na, K, Mg in plants themselves, it is very effective to remove pollutants' ion. 3. After letting aquatic plants grow in a lab for 7 days and checking the quality of water, the average COD was 74% and TOC was 62%, which means that aquatic plants have quite an effective removal efficiency. Especially, the rate of removal for TN using Lemna minor was the highest at 87%, and the rate of removal for PO4-P using Hydrilla verticillata was the highest at 25%. Using a water analyzing kit for 16 days, the result of removal rates of nitrogen and phosphorus was that in the first 3 days of growth, nitrogen in Lemna minor was the highest at 78% and phosphorus in Nymphoides indica was rather high at 50%. After 10 days, however, the highest removal rate in both nitrogen and phosphorus is Trapa japonica, which means that there is big difference in the removal period and efficiency according to the types of plants. With this result, it is expected to purify water quality effectively if we use aquatic plants properly according to the pollutants' types and conditions.
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