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Effects of Water Circulation on the Phosphorus Release Rate from Sediments in the Lake  

Kim, Geonha (Department of Civil and Environmental Engineering, Hannam University)
Jeong, Woohyeok (Department of Civil and Environmental Engineering, Hannam University)
Choi, Seunghee (Research Institute for Environmental Technology and Sustainable Development, Korea University)
Publication Information
Journal of Korean Society on Water Environment / v.21, no.6, 2005 , pp. 595-601 More about this Journal
Abstract
In this research, effects of water circulation on phosphorus release from sediment into water body were studied. Sediments sampled at the Daechung Lake were used for the column experiments with circulation and non-circulation conditions. Deaeration coefficient, $K_1$ and reaeration coefficient, $K_2$ of non-circulation condition were 0.133 and 0, respectively, while $K_1$ and $K_2$ for circulation condition were 0.46 and 0.018, respectively. Oxidation Reduction Potential (ORP) showed a linear relationship with dissolved oxygen (DO) when DO is over 2 mg/L. Phosphorus concentration induced by phosphorus release from sediment was highly dependent upon DO, ORP, and pH. Under anaerobic condition, phosphorus release rate was higher for $Fe^{2+}$-bounded phosphorus compared to that of $Ca^{2+}$-bounded phosphorus.
Keywords
Sediments; Phosphorus; Dissolved oxygen; Ozidation Reduction Potential (ORP); Daechung Lake;
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Times Cited By KSCI : 1  (Citation Analysis)
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