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This study was investigated to improve the phosphorus release and water quality by transformation of sedimentary P fraction for application of CaO₂. For the experiment, 0.5% (w/w) of CaO₂ was homogenized in the sediment and incubated with the control for 20 days. The analytical results showed that pH increased with CaO₂ and redox potential (ORP) was improved in the sediment of the reactor. The growth rate of chlorophyll-a was lower in the CaO₂ reactor and Dissolved Oxygen (DO) of overlying water maintained higher than that of the control. Total phosphorus (T-P) concentration in the overlying water increased from the initial concentration to 0.304mg/L in the control at 20 days. The reactor of CaO₂ was lowered by 29.3%. Ex-P, Fe-P and Ca-P in sediment P fraction were increased with the CaO₂. The formation of bound Fe-P and Ca-P in the sediments seemed to control the release of P by removing the Soluble Reactive Phosphorus (SRP) presented in the pore water. From the result, this indicated that the reduction of P release from the sediments seems to be effective in suppressing the eutrophication of P and improving the oxygen condition in the water quality with the application of CaO₂.
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Abstract
1. 서론
2. 재료 및 방법
3. 결과 및 토론
4. 결론
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