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李成植,金相烈,金燦國 동아대학교 환경문제연구소 1979 硏究報告 Vol.3 No.1
The purpose of this study is to elucidate the effect of surfactant on oxygen absorption in the bubble column. The experiment was carried out according to some parametars such as temperature(8∼36℃), concentration of surfactant (1.25×10^(-3)∼5×10^(-3)%), air velocity (0.38∼0.96m/sec) and hole diameter(0.7∼0.9㎜)of plate. The equilibrium concentration of dissolved oxygen, overall transfer coefficient and surface tension were investigated by experimental data. The results indicated that equilibrium concentration of dissolved oxygen decreased approximately by 5∼20% on water without surfactant and overall transfer coefficient decreased approximately by 10∼30% on water without surfactant.
氣泡塔內에서 竝流 물-알코올-無機酸 溶液中의 가스홀드엎에 관한 硏究
金相烈,李成植 동아대학교 공과대학 부설 한국자원개발연구소 1983 硏究報告 Vol.7 No.1
We have studied gas holdup according to gas velocity, liquid velocity, and properties of solution such as surface tension, viscosity, activity coefficient and density in cocurrent bubble column. The results are as follows; 1. As liquid velocity increases under the large gas velocity, gas holdup decreases to some degree but at slow gas velocity it is not nearly affected. 2. If surface tension of solution grows, gas hold up drops. This phenomena was remarkably appeared in three components mixture solutions of water-methanol-inorganic acid. 3. Gas holdup with a increase of viscosity of solutions rises gradually in 3 solutions of water-ethanol-inorganic acid, but in case of solutions of water-methanol-inorganic acid it grows in the range of the small value and reduces rather in the large value. 4. The correlation among the gas holdup and physical parameters was formulated from experimental data as follows; φ=k(DU_(G)ρ_(G)/μ_(G))ⁿ (σ/g^(½)μ_(L)δ^(½)ε) K and n are the same as Table 1.
金燦國,金相烈,李成植 동아대학교 환경문제연구소 1980 硏究報告 Vol.4 No.1
Adsorption characteristics of chrome, cadminum, cupper and zinc ions on domestic activated carbon were studied by using two kinds of sources. The following conclusions were obtained from the effect of pH, anions and cyanide, adsorption velocity, adsorption isotherm on adsorption of the heavy metal ion and the desorption of the heavy metal ion from domestic activated carbon. 1) Chrome ion is readily adsorpted on activated carbon in the form as HCrO₄^(-) and CrO₄^(2-) in the pH range from 3 to 6 and adsorption velocity was almost come to the equilibriumin an hour. Adsorpted total chrome ion was readily eluted by using 1N-HCl. 2) From the adsorption of cadmium ion in the presense of iodide and bromide, cupper ion with halogen ion and zinc with halogen, it was found that they were easily adsorbed on activated carbon in the form of complex anions. 3) Adsorption isotherms of cupper with citric acid and zinc with cyanide on activated carbon were shown the Freundlich's equation. 4) Zinc complex anions were reversibly adsorbed on activated carbon and easily eluted with 0.1N-HCl.