활성탄에 대한 카드뮴킬레이트 화합물의 흡착특성

조병린,이종집,장윤호 한국화학공학회 1985 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.23 No.5

Amino carbonic acid계(NTA, EDTA, DTPA)와 Amin계(Phen, TEA) 킬레이트 시약을 사용하여 활성탄에 Cd(II)을 흡착시키므로 pH, 몰비[Rm=킬레이트 시약/Cd(II), ㏖/㏖), 킬레이트시약의 흡착성 및 배위자의 영향을 조사하였다. EDTA, DTPA 및 Phen을 사용했을 때 몰비 (Rm)에 따라 최적 pH영역이 이동하는 현상을 볼 수 있었으며, NTA와 TEA는 Cd이온의 제거에 효과적이 아님을 알 수 있었다. 그 최적조건은 DTPA인 경우 Rm=1, pH 5에서 Phen인 경우 Rm=10, pH 5일때 Cd(II)[초기농도 10㎎/ℓ]의 약 95%를 제거할 수 있었다. The effects of PH, molar ratio [Rm= chelating agent/Cd(II), ㏖/㏖], adsorptivity of chelating agent and ligand for adsorption of Cd(II) by activated carbon were investigated by using Amino carbonic acid group (NTA, EDTA, DTPA) and Amin group (Phen., TEA) as a chelating agents. It was found that the optimal PH was shifted with the increasing molar ratio (Rm) of EDTA, DTPA and Phen. and that TEA and NTA were not useful to remove Cadmium ion. Under the optimal condituon PH=5, Rm=1 (DTPA) and PH=5, Rm=10 (Phen.), the removal percent of Cd(II) [initial concentration=10 ㎎/ℓ] was about 95%.

2-프로판올-물 혼합 용액에서의 염화아닐린늄의 분몰랄 부피

조병린,이영자,이익춘,Cho, Byung-Rin,Lee, Young-Ja,Lee, Ik-Choon 대한화학회 1969 대한화학회지 Vol.13 No.3

Determination of partial molal volumes of anilinium chloride isopropanol-water mixtures at 30.00$^{\circ}$showed a distinct minimum at 0.20 mole fraction isopropanol. This was interpreted as maximum in electrostriction effect and minimum in water structure. The depth in $\bar{V}^{\circ}$for alcohol-water mixtures was in the order MeOH > i-PrOH > EtOH, which indicated the importance of microscopic structure around ions.

아세톤-물 및 포름酸-물 混合溶媒中에서의 알칼리 鹽化物溶液의 電導度

조병린,이영자,김광호,Byung-Rin Cho,Yong-Ja Lee,Kwang-Ho Kim 대한화학회 1978 대한화학회지 Vol.22 No.1

여러組成의 아세톤-물 및 포름酸-물 중에서 각각 알칼리鹽化物(LiCl, NaCl, KCl, RbCl, CsCl)의 稀薄溶液의 電導度를 $^30{\circ}C$˚에서 측정하였다. 아세톤-물 混合溶媒中에서의 알칼리鹽化物의 電導度의 結果를 Debye-Huckel-Onsager式으로 解析하였고, 溶媒組成에 따르는 極限當量電導度의 변화를 電解質의 選擇的 溶媒化現象으로 설명하였다. 포름酸-물 中에서의 알칼리鹽化物의 稀薄溶液의 電導度는 溶媒自體의 强한 이온雰圍氣때문에 그 변화를 比較解析할 수가 없었다. The electric conductances of dilute solutions of alkali chlorides (LiCi, NaCl, KCl, RbCl, CsCl) in a series of acetone-water and formic acid-water mixtures were determined respectively at $^30{\circ}C$. The results of the conductances of alkali chlorides in acetone-water mixtures were analysed by the Debye-Huckel-Onsager equation and the variations of limiting equivalent conductances with the compositions of acetone-water mixtures were explained in terms of selective solvation of electrolytes. The conductances of dilute solutions of alkali chlorides in formic acid-water could not be analysed because of the strong ionic atmosphere of solvent itself.

여러온도에서 염화아닐린늄의 수용액중에서의 분몰랄부피 및 점도에 관한 연구

조병린,이영자,김광호,Byung-Rin Cho,Young-Ja Lee,Kwang-Ho Kim 대한화학회 1971 대한화학회지 Vol.15 No.2

Apparent molal valumes ${\phi}_v$ and relative viscosities ${\eta}_r$ of aqueous solutions of anilinium chloride have been determined at two degree intervals from 20 to $50^{\circ}C$ in the molar concentration range 0.003 < C < 0.4. The results are discussed in terms of partial molal volumes $\={V}^{\circ}$, deviations from the Debye-H$\''{u}$ckel limiting law, partial molal expansibilities $\={E}^{\circ}$, viscosity B coefficients calculated from the Jones-Dole equation, and energy of activation for viscous flow. In aqueous solution, anilinium chloride was found to be a weak structure-maker due to its hydrophobic group.

2-프로판올-물 혼합용매에서의 Tetraalkylammonium Chlorides의 분몰랄 부피

조병린,Byung-Rin Cho 대한화학회 1971 대한화학회지 Vol.15 No.2

The apparent molal volumes ${\phi}_v$ of a series of homologous tetraalkylammonium chlorides, $Me_4NCl, Et_4NCl, Pr_4NCl,\;and\;Bu_4NCl$, in a series of isopropanol-water mixtures have been determined at $30^{\circ}C$ from precision density measurements using pycnometers. The values of ${\phi}_v$ extrapolated to infinite dilution give partial molal volumes $\={V}^{\circ}$s which are almost additive for successive homologues and enable one to determine the absolute individual ionic partial molal volumes. The experimental results are discussed in terrns of the varying size and surface charge of the ions and the structure of the binary solvent mixtures. The results indicate that at 0.1 mole fraction isopropanol the maximum structuredness of water causes a minimum in the tetraalkylammonium-cation partial molal volumes, while at 0.2 mole fraction the solvent structure is such that the free volumes is a minimum and the electrostrictive effect of chloride ion is a maximum.

2-프로판올-물 혼합용매중의 tetraalkylammonium chloride 용액의 점도에 관한 연구

조병린,이영자,이익춘,Byung-Rin Cho,Young-Ja Lee,Ikchoon Lee 대한화학회 1971 대한화학회지 Vol.15 No.3

The relative viscosities ${\eta}_r$ of a series of homologous tetraalkylammonium chlorides $Me_4NCl,\;Et_4NCl,\;Pr_4NCl\;and\;Bu_4NCl$ in a series of isopropanol-water mixtures have been determined at $30^{\circ}C$ using Ubbelohde-type viscometers. The viscosity data have been interpreted in terms of viscosity A-and B-coefficients calculated from the Jones-Dole equation, ${\eta}_r=1+AC^{1/2}+BC$. The results indicate that the structure-breaking effect of chloride ion is maximum at 0.l~0.15 mole fraction isopropanol, while the size effect(Einstein effect) of the larger $R_4N^+$ ions is maximum at 0.2~0.25 mole fraction. The results also indicate that in aqueous and water-rich solutions the larger $R_4N^+$ ions (e.g. $Pr_4N+, Bu_4N^+$) appear to be excellent structure-formers and that the viscosities of solutions is not strongly affected by the electrostriction effect of chloride ion.

Dimethyl Sulfoxide-물 混合溶媒中에서 Tetraethylammonium Chloride의 分몰容積 및 粘度에 관한 硏究

조병린,이영자,이익춘,Cho Byung Rin,Lee Yong Ja,Lee Ikchoon 대한화학회 1975 대한화학회지 Vol.19 No.1

여러 組成의 dimethyl sulfoxide(DMSO)-물 混合溶媒中에 tetraethylammonium chloride$((C_2H_5)_4NCl)$의 分몰容積 및 相對粘度를 $30^{\circ}C$에서 測定하였다. 그 結果로 부터 DMSO의 몰分率이 0.2${\sim}$0.3인 組成에서 溶媒構造가 가장 强化된 상태임을 알았으며 이것은 粘度에 關한 Jones-ole式(${\eta}_r=1+AC^{1/2}$+BC)의 A-係數의 最小値 및 B-係數의 最大値의 現象을 나타낸다. 또한 DMSO의 몰分率 이 0.4${\sim}$0.5인 組成에서는 溶媒構造가 가장 파괴된 상태로서 $Cl^-$의 强한 electrostriction 效果로 因한 收縮으로 分몰容積이 最小値이며, 粘度 B-係數가 最小로 나타남을 알았다. 그리고 limiting effective flowing volume $V_e^{\circ}$와 粘度 B-係數와의 사이에 B=2.5$V_e^{\circ}$의 관分率계가 近似的으로 成立함을 確認하였다. The partial molal volumes and relative viscosities of tetraethylammonium chloride in a series of dimethyl sulfoxide (DMSO)-water mixtures were measured at $30^{\circ}C$. A maximum structuredness of solvent, that leads to a minimum viscosity A-coefficient and a maximum viscosity B-coefficient of the Jones-Dole equation(${\eta}_r=1+AC^{1/2}$ + BC), was found at 0.2${\sim}$0.3 mole fraction of DMSO. The solvent structure, that leads to a minimum partial molal volume due to the maximum electrostrictive effect of chloride ion and to a minimum viscosity B-coefficient, was found at 0.4${\sim}$0.5 mole fraction of DMSO. An approximate relationship between the limiting effective flowing volume, $V_e^{\circ}$, and the B-coefficient was found to be B = 2.5 $V_e^{\circ}$ in the Einstein equation.

2-프로판올-물 혼합용매중의 Anilinium Chloride 용액의 점도에 관한 연구

조병린,이영자,이익춘,Byung-Rin Cho,Young-Ja Lee,Ikchoon Lee 대한화학회 1973 대한화학회지 Vol.17 No.1

The relative viscosities ηr of anilinium chloride solutions in a series of isopropanol-water mixtures have been determined at $20^{\circ}$, $30^{\circ}$and $40^{\circ}$, using Ubbelohde-type viscometers. The viscosity data have been interpreted in terms of viscosity A-and B-coefficients calculated from the Jones-Dole equation,${\eta}{\tau}=1+AC^{1/2}+BC$. The energy of activation for viscous flow have also been calculated according to the concept of rate processes. The results indicate that at $0.10{\sim}0.15$ mole fraction isopropanol the maximum structuredness of water gives a minimum values of viscosity A-and B-coefficients, and that anilinium chloride belongs to the borderline case in respect of the structure-making or structure-breaking effects on water. 여러 조성의 2-프로판올-물 혼합용액중의 anilinium chloride 용액의 상대점도를 $20^{\circ}$, $30^{\circ}$ 및 $40^{\circ}$에서 각각 측정하고, Jones-Dole식, ${\eta}{\tau}=1+AC^{1/2}+BC$에서 결정되는 점도 A- 및 B- 계수와, 절대반응속도 이론으로 구해지는 점성흐름의 활성화 에너지로 부터, 용매구조에 미치는 용질의 효과를 논의하였다. 2-프로판올의 몰분율이 $0.10{\sim}0.15$인 조성에서 점도 A- 및 B- 계수가 최소인 현상은 이 조성에서 물의 구조가 가장 강화되기 때문인 것으로 해석하였다. 또 anilinium chloride는 물에 대한 structure-maker 또는 structure-breaker의 입장에서 borderline case에 속한다고 결론지을 수 있었다.

이소프로판올-물 混合溶媒中의 리튬, 나트륨 및 칼륨 鹽化沕 溶液의 電導度

조병린,이영자,김재빈,Byung-Rin Cho,Yong-Ja Lee,Jae-Bin Kim 대한화학회 1976 대한화학회지 Vol.20 No.4

여러 組成의 isopropanol-물 混合溶媒中에서 LiCl, NaCl 및 KCl의 稀薄溶液의 電導導를 測定하였다. 그結果, 濃度에 따르는 當量電鍍度의 변화가 Debye-Huckel-Onsager 식에 대해서 좋은 一致를 보였다. 또한 溶媒中의 isopropanol 組成이 증가함에 따라 極限當量電導度${\Lambda}_0의 값이 급격히 減少하며 이것은 溶媒의 粘度增加 및 誘導常數의 감소로부터 예측되는 바와 같다. 그리고 isopropanol의 몰分率이 0.0, 0.1 및 0.2인 溶媒中에서는 {\Lambda}_0가 {\Lambda}_{0,LiCl} < {\Lambda}_{0,NaCl} < {\Lambda}_{0,KCl}의 順으로 증가하고 있으나, 0.3 몰分率 isopropanol-물中에서는 {\Lambda}_{0,LiCl} < {\Lambda}_{0,KCl} < {\Lambda}_{0,NaCl}의 順으로 바뀌고 있다. 또한 Walden product {\Lambda}_{0{\eta}0}$는 0.1몰分率 isopropanol-물中에서 最大値를 보여 주었다. The conductances of dilute solutions of LiCl, NaCl and KCl in a series of isopropanol-water mixtures were determined at $30^{\circ}C$. The values of equivalent conductance agreed well with Debye-Huckel-Onsager equation and the limiting equivalent conductance was greatly reduced as the isopropanol content of the solvent was increased in accord with predictions based on solvent viscosity and dielectric properties. Also, the limiting equivalent conductance increased in sequence ${\Lambda}_{0,LiCl} < {\Lambda}_{0,NaCl} < {\Lambda}_{0,KCl} in 0.0, 0.1 and 0.2 mole fraction isopropanol, but {\Lambda}_{0,LiCl} < {\Lambda}_{0,KCl} < {\Lambda}_{0,NaCl} in 0.3 mole fraction ispropanol. The maximum Walden product, {\Lambda}_{0{\eta}0}$ was found in 0.1 mole fraction isopropanol for all electrolytes.

자동차 배기가스 촉매정화장치의 정상상태 수치모사

조병린,방형수,안화승 한국화학공학회 1988 NICE Vol.6 No.2