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RISS 인기검색어
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金崧平,趙哲衡,金二炫 朝鮮大學校 工科大學 1974 論文集 Vol.3 No.-
It was found that almost all amount of K₂SO₄in uncalcined alunite was extracted in the forms of K₂SO₄(NH₄)₂SO₄mixture in proper concentration (7∼8mol) of ammonia water. This process was attempted to extract the potash ammonia ferlitizer fron the uncalcined mt. ok mae alunite ore under appopriate raction temperature and react-on time. The indastrial manufactuing methods of the potsh-ammonia mixtnre fertilizer are as follows; (1) The appliable reaction temperatare by the experimental data, was 230∼240℃ (2) The optimum time applied to the reaction was 3 to 4 hoars.
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조철형,김숭평,유적용 조선대학교 생산기술연구소 1981 生産技術硏究 Vol.1981 No.-
The critical moisture content of excrements filtered has been determined to be about 200% (D. B) based on the characteristic curve for drying, obtained by pilot plant tunnel dryer method. Temperature, humidity, flow rate and thickness of the feed material, and direction of air flow had large effect on drying in the constant rate period, but had little effect in the falling rate period. The optimum operation condition for drying with tunnel dryer had been investigated.
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宋連浩,權圭赫,金崧平 조선대학교 기초과학연구소 1984 自然科學硏究 Vol.7 No.1
In this work, we measured the surface excess of binary liquid mixtures of benzene and cycloexane on CuNaY Zeolite at 20, 25, 30 and 35℃. The relations between the mole fraction and the surface excess of the absorbate in the adsorbed phase were obtained from the thermodynamic analysis on the adsorption equilibrium of liquid mixtures. Excess properties in the absorbed phase were determined and which were satisfied with the themodynamic analysis. The surface excess and the mole fraction were experimentally obtained from the system of bezene-cyclohexane on CuNaY Zeolite and they were decreased with the temperature increase. Benzene was preferentially absorbed and the amount of adsorption of benzene was greater than that of cyclohexane.
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전윤,김숭평 조선대학교 생산기술연구소 1984 生産技術硏究 Vol.6 No.2
The adsorption isotherms of oxygen on the natural zeolite were obtained at the temperature of liquid oxygen and analysed by utilizing Langmuirs and Dubinin Astakhovs equation. The conclusion is that there are two types of adsorption site and effective micropore volume obtained from the intercepts taken at p/p_(o)=1 by extrapolation of the linear parts of isotherms of the zeolites have a maximum value at about 35 unit cell number, but real volumes of the solids increase linearly with decreasing unit cell number until the corruption of zeoite crystal structure is reached. The characteristic energies of adsorption on the zeolite increase linearly with increasing unit cell number.
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조철형,신성의,김숭평 조선대학교 생산기술연구소 1981 生産技術硏究 Vol.1981 No.-
Domestic Ok-mai Mt. -alunite was treated with aqueous sodium hydroxide solution. The crystalline structure was studied by X-ray diffracton method. The optimum, conditions for sodium A zeolite formation were as follows: ◁표 삽입▷ (원문을 참조하세요)
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명반석으로 부터 Zeolite 합성 반응 속도에 관한 연구
조철형,신성의,김숭평 조선대학교 생산기술연구소 1981 生産技術硏究 Vol.1981 No.-
Sodium aluminosilicate, sodium A zeolite and hydroxysodalite were obtained by treating OK-mai Mt.―alunite with IN aqueous sodium hydroxide solution for one to twenty hours and with temperature range from 60 to lOO℃. the reaction mechanism was observed as first order series reation as follows: ◁수식삽입▷ (원문을 참조하세요) By applying the above reaction mechanism, rate constants and activation energies measured. The activation energies of the reactions from alunite to sodium aluminosilicate, from sodium aluminosilicate to sodium A zeolite, and from sodium A zeolite to hydroxysodalite were 9 kcal/mol, 20 kcal/mol, and 18 kcal/mol, respectively.
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황토의 유해성 적조생물 Cochiodinium종의 제거효과
최희구,김평중,이원찬,윤성종,김학균,이흥재,CHOI Hee Gu,KIM Pyoung Soong,LEE Won Chan,YUN Seong Jong,KIM Hak Gyoon,LEE Hung Jae 한국수산과학회 1998 한국수산과학회지 Vol.31 No.1
황토에 의한 Cochlodinium 종의 제거효과실험을 실내와 현장조사를 통하여 실시하였다. 실내실험은 Cochiodinium 적조생물을 배양하여 황토 및 이를 산처리로 활성화시켜 살포농도를 $2\;g/\ell$에서 $10\lg/\ell$로하여 제거효율을 조사하였다. 황토의 적조생물제 거효과는 살포농도 $2\;g/\ell$에서 $43\%$, $6\;g/\iota$에서 $64\%$로 점차 향상되기 시작하여 $10g/{\ell}$에서는 살포 60분후 $88\%$의 제거효과를 나타냈다. 현장조사는 Cochlodinium 적조가 빈발한 통영 활목-오비도해역에서 1996년 9월에 2회 실시되었다. 황토살포 전후로 해서 실시된 조사에서도 역시 황토살포 30분후에 Cochlodinium 적조생물이 $72\~83\%$가 제거됨으로써 좋은 제거효과를 나타냈다. 수질인자중 수온과 pH는 살포전후 변화가 없었으나 용존산소, 화학적산소요구량 및 클로로필 a의 농도는 다소 감소하였고 부유물질은 증가하였다. 부영양화 인자중 용존무기인은 살포전후 농도변화가 없는 반면, 용존무기질소는 살포후가 살포전에 비해 다소 감소하였다. 따라서 황토살포는 $10\;g/{\ell}$전후로 살포하는 것이 적조생물 제거효과에 바람직하며 수질에도 큰 영향이 없는 것으로 조사되었다. The clay and yellow loess have capability to adsorb and precipitate particles. The removal efficiencyes of those flocculents on the dinoflagellate, Cochlodinium polykrikoides, have been studied in laboratory and in field near Tongyong fish farm in September, 1996. The removal efficiencyes in the laboratory experiment was $43\%$ for $2\;g/{\ell}$, $64\%$ for $6g/{\ell}$ and $88\%$ for $10\;g/{\ell}$ in one hour after dispersion. No big difference of removal efficiency was found between the raw and the acid-activated loess. In the field survey, the removal rates ranged from 72 to $80\%$ in 30 min after the dispersion. The effect of loess scattering on water quality was estimated. The concentrations of dissolved inorganic nitrogen (DIN), chemical of gen demand (COD) and chlorophyll a decreased more or less after dispersion, while the concentration of suspended solid (SS) increased. The concentrations of dissolved oxygen (DO) and dissolved inorganic phosphorous (DIP) were kept constant. These results indicated that the dispersion concentration of more than $10g/{\ell}$ has a good removal efficiency of above $80\%$ without big variation of water quality after dispersion of yellow loess.
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