Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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The Effect of CaO2 Application on the Change of Sedimentary Phosphorus Fraction and Water Quality

CaO2 적용에 따른 퇴적물의 P fraction 변화와 수질에 미치는 영향

  • Kim, Beom-geun (Department of Ocean system Engineering, College of Marine Science, Gyeongsang National University) ;
  • Khirul, Md Akhte (Department of Ocean system Engineering, College of Marine Science, Gyeongsang National University) ;
  • Kwon, Sung-Hyun (Department of Marine Environmental Engineering, College of Marine Science, Engineering Research Institute, Gyeongsang National University)
  • 김범근 (경상대학교 해양과학대학 해양시스템공학과) ;
  • 모하메드아케트키룰 (경상대학교 해양과학대학 해양시스템공학과) ;
  • 권성현 (경상대학교 해양과학대학 해양환경공학과 공학연구원)
  • Received : 2019.03.08
  • Accepted : 2019.04.17
  • Published : 2019.05.31
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Abstract

This study was investigated to improve the phosphorus release and water quality by transformation of sedimentary P fraction for application of $CaO_2$. For the experiment, 0.5% (w/w) of $CaO_2$ was homogenized in the sediment and incubated with the control for 20 days. The analytical results showed that pH increased with $CaO_2$ and redox potential (ORP) was improved in the sediment of the reactor. The growth rate of chlorophyll-a was lower in the $CaO_2$ 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 $CaO_2$ was lowered by 29.3%. Ex-P, Fe-P and Ca-P in sediment P fraction were increased with the $CaO_2$. 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 $CaO_2$.

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