습지 식생 유형이 습지의 생지화학적 특성 및 영양염류에 미치는 영향

Abstract

Recently, the methods using the plants in wetlands have come into the spotlight as an ecological alternative which regulates nutrient removal from non-point source. However such researches are limited to emergent plants and the removal mechanisms for water pollutant by non-emergent plants in constructed wetlands are not clearly understood. Therefore, in order to understand the effects of biogeochemical properties on the nutrient behavior in the constructed wetland, in this study we have observed removal efficiencies of nutrients by various vegetation types at the artificially constructed microcosm for 5 days. Nutrients are better absorbed by Eichhornia crassipes which is one of the floating plants than by Ceratophyllum demersum in lower water temperature, DO, pH conditions, and The removal efficiency by Eichhornia crassipes was 60.66% in TN, 86.88% in TP. Ceratophyllum demersum which is one of the submerged plants supplied oxygens in the water by photosynthesis and promoted ammonification and nitrification reaction. The removal efficiency by Ceratophyllum demersum was 75.24% in TN, 88.44% in TP. Therefore we can confirm that findings of this study are used to select proper vegetation type for certain hydrology, climate, soil conditions when we design constructed wetland.