Kaolin 懸濁液에서 Amylose가 凝析에 미치는 影響

金昺圭,李光炯 成均館大學校 科學技術硏究所 1989 論文集 Vol.40 No.1

A waste water pollution method is usually divided into the two general method; Physical treatment methods and chemical treatment methods. The coagulation is the physical treatment method sedimenting particles by the coagulants. It is very important process in separating sollid-liquid phase. Therefore considering organic compound in waste water, the experiment had been studied the effect of amylose on flocculation in kaolin suspension by choosing amylose for organic compound and aluminum sulfate for the coagulant. The investigation was carried out to study the comparison of coagulation effect in kaolin suspension +Al_2(SO_4)_3 solution, kaolin Suspension + amylose solution, and kaolin suspension +Al_2(SO_4)_3 solution+amylose solution. The results are as follows; 1) When Al_2(SO_4)_3 solution only was added to kaolin suspension, it was the most effective among three suspensions. 2) When Al_2(SO_4)_3 solution and amylose solution were added to kaolin suspension, the coagulation effect was very poor than only Al_2(SO_4)_3 solution was added. 3) When amylose solution added to kaolin suspension, it was the most ineffective among three suspensions. Also, with increasing particles, size in kaolin suspension, gravity sedimentation slightly appeared within the range of sensitive action, but within the range of protective action above optimal amylose concentration, it greatly appeared. The optimal amylose concentration increases with increasing particle size and the range of effective amylose concentration for coagulation of kaolin suspension also became wider for 12 hrs. 4) In three suspensions, an equation was obtained between relative turbidity and settling time as the following; log T_rel = -mlogt + logC° 5) Considering the aspects of effect of pH coagulation of kaolin suspended in water, as acidity increased, coagulation effect gradually increased and also as alkalinity increased, coagulation effect greatly decreased and then, irrespective of pH, coagulation effect increased by gravity sedimentation.

活性炭 固定層에서 多成分系 液相吸着의 破過曲線

金昺圭,李鏞喆 成均館大學校 科學技術硏究所 1989 論文集 Vol.40 No.2

In this study, adsorption breakthrough curves were measured and predicted for dilute, aqueous, single and_bi-solute solutions on activated carbon in fixed bed. Single and bi-solute adsorption data(aniline, paranitrophenol and phenol) were determined experimentally for aromatic. compounds in fixed bed. The aim of this work was to study the fixed bed multicomponent adsorption problem in more generalized way taking into account the results of adsorption equilibria and the competitive and interactive effects and to develop the necessary numerical method for its solution. The results were as follows: 1. For multispecies adsorption, breakthrough curves were predicted on the basis of the Langmuir isotherm and the IAS theory, and the predicted values based on the IAS theory gave good results. 2. The proposed model could be used satisfactorily for the interpretation of the behavior of multicomponent fixed bed adsorption and prediction of breakthrough curves although some deviations between the predicted breakthrough curve by the IAS theory and the measured one were observed.

犯罪成立 要件間의 質的轉化와 自招危難으로 인한 避難行爲의 性格

金炳圭 全南大學校 社會科學硏究所 1980 社會科學論叢 Vol.5 No.-

回分式 反應器에서 活性炭에 依한 低濃度有機物의 多成分系 液相吸着平衡

金昺圭,李鏞喆,黃尙勉 成均館大學校 科學技術硏究所 1989 論文集 Vol.40 No.2

Multicomponent liquid ,phase adsorption of dilute organics(aniline, phenol, p-chlorophenol and p-nitro-phenol) on activated carbon was carried out in a batch reactor. In this study, multicomponent adsorption equilibria were predicted from single and bi-solute data using the ideal adsorbed solution(I.A.S.) theory developed by Myers and Prausnitz while the single-solute equilibria were represented by Freundlich isotherm. The affinity for activated carbon was in the order of para-nitrophenol>para-cholrophenol>phenol> aniline. The Freundlich isotherm was suitable. for single-solute system. But for multicomponent systems, tine isotherms calculated from single-solute data by using I.A.S. theory gave good prediction for the amount adsorbed. For single component systems, the piecewise Freundlich isotherms obtained in several divided equilibrium ranges were used. These isotherms could reduce the deviation appearing in the low concentration ranges.

Monazite稀土類元素分離의 工業的價値(第一報)

金昺圭 成均館大學校 1961 論文集 Vol.6 No.-

Cement 粉碎效果에 Allyl alcohol이 미치는 影響

金昺圭 成均館大學校 1979 論文集 Vol.26 No.-

所要粉碎動力費를 節減하기 爲하여 有機溶媒를 粉碎助劑로 擇하고 液相接觸으로 그 粉碎效果를 向上시키는 硏究는 여러學者들에 進行되어왔다. 筆者는 이에 立脚하여 우리나라에서 動力費節減이 要求되는 Cement 製造를 對象으로 하고 손쉽게 얻을 수 있는 飽和一價 Alcohol類를 粉碎助劑로 擇하고 接觸確率을 增加시키기 爲하여 氣相接觸으로 飽和一價 Alcohol類 또는 有機溶媒를 粉碎助劑로 製品品質의 影響이 없고 粉碎效果가 좋은 100℃附近에서 Cement粉碎效果를 硏究하였다. 더욱 今番實驗에서는 工場에서 操作하는 比率을 擇하여 Cement Clinker에 2.5% 石膏를 添加한 後에 不飽和一價 Alcohol인 Allyl alcohol(b.p 97℃)을 粉碎助劑로 擇하여 相互 粉碎效果를 比較하고 原因으로 推定되고 吸着現象도 아울러 測定하여 그 粉碎效果와의 關係를 對照檢討하였다. 그結果 不飽和 一價 alcohol이 飽和一價 alcohol 中 가장 粉碎效果가 좋은 n-propyl alcohol보다 더 增加시켰고 또 粉碎效果增加는 吸着量과 比例됨을 認知하였다. 그러나 物性인 引張强度. 壓縮强度는 前者가 後者보다 減少되지만 그 減少率이 극히 少量인고로 構造物로의 許容 範圍內에서 使用可能함을 今番實驗結果로서 確信을 얻었다. Most expenses of production in cement industry are electric power, therefore many scientists had researched through various ways for saving power cost. Especially, they are an urgent problem, for Korea electric power cost so expensively. As one means of saving power, by crushing aid of organics(i.e. primary, secondary alcohol series, fat, or resins), it was atempted to prevent the growth of secondary particles on liquid contacting system. But it was not sufficient on heterogeneous dispersion system. In this experiment, the increasing of crushing effect was investigated in gaseous contacting system and 100℃ of not influencing upon cement products. Then, organic crusing aid were used Allylalcohol, in range of 0.1-0.5% (wt%) concentration. Thus, saving power and properties of structures depend on factory data. On standard of comparing data, continuous method in dry crushing was adopted to practical operation condition. Therefore, it must be analysed by batch mothod in possible application because it is better than continuous method. treated on computation of power should be done by crushing ratio, directly, but was tendency of specific surface mean diameter of particles according to hour limit. Also, the increment of crushing effect had been refered to the adsorption phenomena on cement particles by the vapor of organic solvent with crushing aid in the experiment of crushing. Then, the adsorption phenomena has researched by Gaschromatography method, because of it's convenience and accuracy. Organic solvent had been used as the adsorbate (i,e. allylalcohol) Through the experimental investigation, the following results were obtained: 1) Saving power were increased by the increase of temperature and amount of organic crushing aid. Also it was increased up to 26%, by the adsorption of Allyl alcohol vaper 0.5 wt. %. 2) The adsorptivity of unsaturated alcohol (allyl allyl alcohol) is more than saturated alcohol (n-propyl alcohol) 3) Adsorption phenomena of these organic solvents have the similar tendency to the Freundlich's adsorption isotherm equation. 4) After 6 hours of the crushing time when the difference of the crushing effect had taken place, the amount of adsorption has rapidly increased. But, before this time the amount of adsorption has not almost increased. 5) Crushing effect has been increased with the increment of amount of adsorption.

粘土懸濁液에 親水無機 膠質이 미치는 影響

金昺圭 成均館大學校 1963 論文集 Vol.8 No.-

This purpose was investigated the conception of the sensitization by the dehydration of hydrophilic sols to hydtrophobic sols. Accordingly, in order to get the phenomenon, sample was taken by the hydrophobic sols of clay suspension and the hydrophilic sold of SiO₂, and SnO₂, and S because is that the size of clay sample is not colliod range but it is charged negatively and sols of SiO₂, SnO₂, and S are also hydrophilic sold which is charged negatively. Thus, in order of investigation, the first is that the setting velocity of clay suspension was observed by electrolytes.(ie NaCL. KCL. MgCL₂, CaCl₂, AlCl₃, Al₂(SO₄)₃. KAI(SO₄)₂.) Second, was observed the settling velocity of clay suspension by the hydrophilic sols. (i. e. SiO₂, SnO₂, and S) from the results 1) It will find that the sensitization has been appeared because settling velosity of clay suspension increases more with increasing of the concentration hydrophilic sols. But, above some range of increasing of hydrophilic sols on the contrary, settling velocity is gradually decreased. 2) Comparing with the action of electrolytes sbustance and hydrophillic-sols, coagulating force of the sensitization of the hydrophilic-sols to clay suspension is weaker than the electrolytes in general.

농지연금제도를 통한 농촌노인의 생계비 개선효과에 관한 연구

김병규(金炳圭),송건섭(宋建燮),조덕호(曺德鎬) 한국지방자치학회 2011 韓國地方自治學會報 Vol.23 No.3

This study aims to estimate the degree that the benefits through the farmland reverse mortgage(FRM) covers the minimum cost of living for the rural elderly. After introducing the actuarial model of FRM, we elaborate critical factors like farmland value rising rates, interest rates, loan survival probability, and loan termination probability. We calculate the monthly annuity that farmers can receive, and add it to the income through rice cultivation or rice field rental to figure out total income by joining FRM. Then, how much benefits through FRM can cover the minimum cost of living for the rural elderly analyzed. In the results, benefits by joining FRM covers considerable portion of minimum cost of living for 2-people household even if officially assessed land price is applied to the actuarial model for the estimation.