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Speciation of Phosphorus Dependent upon pH and Oxidation Reduction Potential in Overlying Water and Sediment  

Jung, Woo-Hyeok (Department of Civil and Environmental Engineering, Hannam University)
Kim, Geon-Ha (Department of Civil and Environmental Engineering, Hannam University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.28, no.5, 2006 , pp. 472-479 More about this Journal
Abstract
In this research, speciation of phosphorus in sediment and overlying water dependent upon pH and ORP(Oxidation Reduction Potential) was studied. Three possible conditions were simulated: open system with circulation, closed system with stratification and closed system with sand capping on the sediment. Phosphorus release rate from sediment was increased for both open system and closed system if pH was less than 6.0. Phosphorus concentration for closed system was increased from 0.9 mg/L to 0.51 mg/L, and stabilized at 0.34 mg/L if anaerobic conditions were maintained in the overlying water. When sand capping was implemented, phosphorus concentrations of overlying water were maintained less than those of closed system.
Keywords
Oxidation Reduction Potential; Phosphorus; pH; Sediments; Speciation; Overlying Water;
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