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http://dx.doi.org/10.5338/KJEA.2003.22.2.148

Screening of the Optimum Filter Media in the Constructed Wetland Systems through Phosphorus Adsorption Capacities  

Lee, Hong-Jae (Division of Applied Life Science, Gyeongsang National University)
Seo, Dong-Cheol (Division of Applied Life Science, Gyeongsang National University)
Cho, Ju-Sik (School of Environment and Agricultural Science, Sunchon National University)
Heo, Jong-Soo (Division of Applied Life Science, Gyeongsang National University)
Publication Information
Korean Journal of Environmental Agriculture / v.22, no.2, 2003 , pp. 148-152 More about this Journal
Abstract
The phosphorus(P) adsorption capacities of various filter media were investigated in relation to the size and types of fitter media to screen the optimum condition. The objective of this study was to evaluate the constructed wetland longevity by improving P adsorption capacity. The maximum P adsorption capacities of filter media A($4{\sim}10\;mm$), B($2{\sim}4\;mm$) and C($0.1{\sim}2\;mm$) were 8, 10 and 22 mg/kg, respectively, showing those increased as the filter media size decreased. Among the experimental media, the optimum filter media size was $0.1{\sim}2\;mm$. When the filter Medium was supplemented with organic materials which were piled up and decayed in the constructed wetland, the P adsorption capacity was significantly enhanced Under the conditions of optimum fitter media size, the respective Maximum P adsorption capacities of filter media C when supplemented with Ca, Mg, Al and Fe were higher than that of filter media C. However the addition of Ca, Mg, Al and Fe to constructed wetland were not recommended because of the possibility of their secondary pollution. The maximum P adsorption capacity of filter media C was 22 mg/kg, but this was increased to 36 mg/kg when filter media C was supplemented with 2% oyster shell.
Keywords
constructed wetland; phosphorus adsorption capacity; filter media; organic materials; oyster shell; Langmuir adsorption isotherm;
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