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Effects of Submerged Plants on Water Environment and Nutrient Reduction in a Wetland  

Yi, Yong min (Department of Ecological Engineering, Pukyong National University)
Lee, Suk Mo (Department of Ecological Engineering, Pukyong National University)
Sung, Kijune (Department of Ecological Engineering, Pukyong National University)
Publication Information
Journal of Korean Society on Water Environment / v.26, no.1, 2010 , pp. 19-27 More about this Journal
Abstract
Submerged plants whose most of vegetative mass are below the water surface can have great effects on wetland biogeochemistry and water purification through their photosynthesis and nutrient uptake processes. In this study, change of dissolved oxygen concentration and pH as well as nutrient removal capacity of the submerged plant dominant wetland were investigated using wetland mesocosm experiments. Obvious periodic DO and pH fluctuation was observed due to photosynthetic activities of the submerged plants. It implies that the submerged plants can provide periodic or sequential changes of oxic and anoxic conditions that affect nitrification and denitrification processes and contribute permanent nitrogen removal in the wetland system. The pH changes in the wetland mesocosm suggested that submerged plant could also play an important role as a temporary $CO_2$ storage. Higher nutrient removal efficiency was observed in the submerged plant dominant wetland mesocosm. The removal efficiencies under experimental conditions were 38.89, 84.70, 91.21, 70.76, 75.30% of TN, DIN, $NH_4-N$, TP, $PO_4-P$ in the wetland mesocosm, while those were 26.11, 57.34, 63.87, 28.19, 55.15% in the control treatment, respectively.
Keywords
Nutrient removal; Periodic change; Submerged plant; Wetland biogeochemistry; Wetland mesocosm;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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