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Phosphorus Adsorption of Soil Particle Size Classes : Application of a Modified Elovich Equation
LEE, DOWON 한국외국어대학교 외국학종합연구센터부설기초과학연구소 1991 기초과학연구 Vol.2 No.-
Phosphorus adsorption of soil particle size classes could be characterized with a modified Elovich equation. Its integrated from is given as S = 1/ ε1n (t + 1/λε) + 1/ε1n λε, where S is the amount of an adsorbate contained in an absorbent (mg/kg), and λand εare constants for a soil material during any one experiment(mg/kg/hr and kg/mg, respectively). Parameter εwas always inversely related to phosphorus concentration of background solution. The values of λin silt (the particle size class of 2-50 μm in diameter) tend to decrease with decreasing phosphorus concentration of background solution, but the tendency was opposite in clay (the particle size class of < 2 μm in diameter).
Perspectives of Ecological Engineering to Enhance Nutrient Removal in Wetlands
Lee, Dowon 서울大學校 環境大學院 1996 環境論叢 Vol.34 No.-
I propose management practices which can maintain removal mechanisms of nutrients in wetlands and enhance the transformation of nutrients into valuable biological resources. In brief, characteristic biogeochemical processes of nitrogen and phosphorus under aerobic and anaerobic conditions are considered to effectively treat nutrient-enriched wastes in wetlands. Based upon diverse food chains and biomanipulation, a water quality perspective requires that wetlands be managed to function not only as a sink of nutrients but also as a source of organisms which are dispersed to adjacent terrestrial sinks of organisms. Finally, I also propose some prospective research subjects to test hypotheses related to the management practices.