입상점토광물에 대한 염료폐수의 흡착

이택혁,윤국중,김선태,Lee, Tack-Hyuck,Youn, Guk-Jung,Kim, Seon-Tae 배재대학교 자연과학연구소 2003 自然科學論文集 Vol.13 No.1

Granular clay minerals for adsorption of the organic dye prepared a Na-Bentonite and optimum condition calcined temperature $700^{\circ}C$ and polyvinyl alcohol quantity was 25%. Granular clay mineral stable range was pH3 to pH9 and specific area was $83m^2/g$. The adsorption of the organic dye on the Granular clay mineral showed result good adsorption with acid medium and then enthalpy was -3.36 ~ -0.84 kcal/mol. It was exhibit typical physical adsorption. 점토광물은 첨단소재용 원료로서 석유, 펄프, 비료, 점결제와 페인트 등 사용분야가 다양한 광물이며, 이러한 천연 점토광물을 비교적 간단하게 처리하여 체내에 농축되면 독성과 피해를 일으키는 염료 폐수의 흡착처리 및 흡착 메커니즘에 대해서 조사하였다. 그 결과 유기염료를 흡착처리하기 위한 입상 점토광물제조의 최적조선은 굽기온도 $700^{\circ}C$이며, 점결제인 polyvinyl alcohol 의 량은 25% 이었다. 제조된 입상 점토광물의 pH는 중성이었고 산성 메디움에서의 안정한 pH의 범위는 3~9 사이였고, 비표면적은 $83m^2/g$ 이였다. 제조된 입상점토광물에 대한 유기염료의 흡착량은 산성 메디움에서 좋은 흡착결과를 보였고, 이때 흡착엔탈피는 -3.36~ -0.84 kcal/mol 로 전형적인 물리흡착임을 나타내었다.

XAD 고분자 수지에 대한 phenol류의 흡착메카니즘에 관한 연구

이택혁 培材大學校 1985 論文集 Vol.7 No.-

Distribution coefficient(log Kd) of phenol by XAD-2 resin stable at the range about 75-108% with maximum adsorption and adsorption behavior of phenol by XAD resins were followed with the Langmuir but got out of the model with increasing temperature up to 313。K. Interaction energy between phenol and XAD resins was to be good relativity with adsorption enthalpy at the stacking factor, F= 0.65. The main factor on the adsorption energy of phenol by XAD-2 , XAD-7 and Dowex 1-X 8 resin was dispersion energy, but dipole interaction energy act with neglectable.

Amberlite XAD 수지에 대한 일치환 할로 페놀들의 흡착거동에 관한 연구

이택혁,이대운,Lee, Taek Hyeok,Lee, Dae Un 대한화학회 1990 대한화학회지 Vol.34 No.3

Amberlite XAD-2 및 XAD-7 수지에 대한 페놀과 그 할로겐 일치환체들에 대한 흡착성을 분포계수를 측정하여 조사하였다. XAD 수지에 대한 페놀의 흡착은 Langmuir 등온흡착으로 설명될 수 있었으며, 이 때의 흡착은 분자의 크기에 따르는, 즉 분산상호작용에 기인하는 전형적인 물리흡착임을 알았다. 고분자 합성수지에 대한 페놀류의 흡착에너지는 Lennard-Jones potential로 계산하였다. 이 때 고분자 수지의 반지름은 수지의 최소기본단위의 van der Waals 부피로부터 계산하였으며 페놀류의 분자 반지름도 같은 방법으로 구하였다. 페놀유도체들의 흡착성은 각 수지에 대한 시료의 Stacking factor (F)-고분자 수지와 페놀류사이의 van der Waals 부피로부터 구한 평형거리의 보정인자-로부터 흡착에너지를 구하고 뱃치법으로 측정한 흡착엔탈피값과 비교함으로써 설명할 수 있었다. 각 수지에 대한 페놀이온의 흡착엔탈피는 쌍극자 작용력이나 하전-쌍극자 상호작용보다 분산상호작용이 주 요인인 것으로 나타났다. The adsorption mechanisms of phenols on XAD-2 and XAD-7 resins were studied by using the distribution coefficient(log Kd) measured in the optimum adsorption conditions. It was observed that the Langmuir adsorption isotherm, indicating a molecular size-dependent adsorption, was appropriate for characterizing the adsorption behaviors of phenols on XAD-2 and XAD-7 resins. The adsorption energies of phenols on XAD resins were calculated by Lennard-Jones potential equation. In the calculation of the adsorption energy, the molecular radii and dipole moments of the resins and phenols were calculated by their van der Waals volumes and Debye equation, respectively. The stacking factor (F) were determined from the radio of the equilibrium distance to the stacking distance of molecules. In order to explain the adsorption energy calculated from the stacking factor it was compared with the adsorption enthalpy for each of phenols which was experimentally determined by batch adsorption shake method. It was observed that the adsorption enthalpy of phenolate ions on the XAD resins was likely to be more seriously affected by dispersion interaction than by a dipole or a charge interaction.

5.7-diiodo-8-hydroxyquinoline-XAD침윤수지의 금속이온흡착 및 분리에 관한 연구

이택혁,손병찬,오용주 培材大學校 1985 論文集 Vol.6 No.-

5,7-diiodo-8-hydroxyquinoline(DIHQ)의 Amberilte XAD -4 및 XAD-7 수지에 대한 최적흡착 pH는 pH3.0-7.0 영역이다. 이 pH에서 XAD-4 및 XAD-7 수지에 대한 DIHQ의 침윤량은 각각 3.10×10?²mmol DIHQ/g, XAD-4 resin와 1.80× 10?²mmol DIHQ/g, XAD-7resin이었다. DIHQ-XAD-4 및 DIHQ-XAD-7 침윤수지는 pH 3.0-7.0 영역에서 안정하였으며, 특히 DIHQ-XAD-4수지의 경우에는 횹착된 금속이온의 회수에 사용되는 용리액인 HCI의 농도가 증가하여도 안정도가 감소하지 않았으며 DIHQ-XAD-7수지의 경우에는 HCI의 농도의 증가에 따라 안정도가 감소하였다. DIHQ-XAD침윤수지에 대한 금속이온의 흡착은 Cu(Ⅱ), Cd(Ⅱ) 및 Ni(Ⅱ)의 경우에는 pH 9.0에서 최대흡착을 보였으며 이때 각 금속이온의 흡착몰비(금속이온 : DIHQ)는 1:2이었으며, Fe(Ⅲ)의 경우에는 3.0-4.0 영역에서 최대흡착을 보였으며 이때 흡착몰비는 1 :3이었다. DIHQ-XAD-4 및 DIHQ-XAD-7 침윤수지에 흡착된 금속이온은 각각 5M HCl 및 1M HCI 용액으로 용리하였을 때 정량적으로 회수되었으며, DIHQ-XAD-4침윤수지의 경우엔는 5M HCl을 용리액으로 사용하였을때 침윤량의 감소없이 5회이상 재사용이 가능하였으나 DIHQ-XAD-7 침윤슈지의 경우에는 1M HCl을 용리액으로 사용하였을때 5회 재사용에서 침윤량이 1/2로 감소하였다. The adsorption behavior of 5,7-diiodo-8-hydroxyquinoline(DIHQ) on Amberlite XAD-4 and -7 resins was investigated by measuring its distribution coefficients under various experimental conditions, such as shaking time, pH and concentration of organic solvent in medium. The application of DIHQ-impregnated-XAD resins for adsorption and separation of metal ions was studied. The maximum adsorption of DIHQ on XAD resins was observed in 30% acetone solution having pH range from 3.0 to 7.0. The impregnation capacities of XAD resins for DIHQ were 3.10 × 10?²mmol DIHQ/g,XAD-4resin and 1.80 × 10?²mol DIHQ/g,XAD 7 resin respectively. The DIHQ-impregnated-XAD resin was stable in pH range from 3.0 to 7.0 and the amount of DIHQ leached from XAD-4resin by eluting with variation of hydrochloric acid concentration, 1 to 5M, was negligible. The optimum pH range for adsorption of metal ions on DIHQ-impregnated-XAD resin was 9.0 for Cu(Ⅱ), Cd(Ⅱ) and Ni(Ⅱ), and was 3.0 for Fe(Ⅲ), and the adsorption mole ratio of metal ion to DIHQ were 1:2 for Cu(Ⅱ), Cd(Ⅱ) and Ni(Ⅱ), and 1:3 for Fe(Ⅲ) at the above pH range. It was found that the adsorbed metal ions on DIHQ-impregnated-XAD-4 and -7 resin was recovered quantitatively with 5M HCl and 1M HCl respectively. The DIHQ-impregnated-XAD-4 resin could be reusable over 5times without decrease in its impregnation capacity, but DIHO-impregnated-XAD-7 resin was decreased in its impregnation capacity to 1/2 with 1M HCl.

[화학]수용액중에 함유된 석유화합물들의 흡착처리에 관한 연구

이택혁(T. H. Lee),손병찬(B. C. Son),이상범(S. B. Lee),김일한(I. H. Kim) 한국분석과학회 1992 분석과학 Vol.5 No.1

[화학]Na-셀룰로스에 대한 금속이온들의 흡착성에 관한 연구

이택혁(Tack-Hyuck Lee),윤국중(Koog-Joong Yoon) 한국분석과학회 1994 분석과학 Vol.7 No.3

5,7-dihalo-8-hydroxyquinoline-XAD-7 침윤수지에 의한 금속이온의 흡착 및 회수에 관한 연구

이택혁,음철헌 培材大學校 1985 論文集 Vol.7 No.-

The Amberlite XAD-7 resin impergnated with 8-Hydroxyquinoline derivatives(DCHQ, DBHQ, DIHQ) has been studied to be applied to the selective and quantitative adsorption and recovery of some metal ions such as Cu(Ⅱ), Ni(Ⅱ) and Zn(Ⅱ) from the various aqueous solution. Distribution coefficient and impregnated capacity of DXHQ on XAD-7 resin was as follows : DCHQ < DBHQ < DIHQ. In considering acidity of DXHQ, the order increases as follows DCHQ < DBHQ < DIHQ. The impregnation capacities of XAD-7 resin for DXHQ were 9.06×10??mmol DCHQ/g, XAD-7, 1.5×10??mmol DBHQ/g, XAD-7, 1.81×10??mmol DIHQ/g, XAD-7 respectively. The DCHQ-impregnated-XAD-7 resin was stable in pH range from 4.0 to 8.0, DBHQ and DIHQ-impregnated-XAD-7 resin were stable in pH range from 3.0 to 7.0. Amounts of adsorbed metal ions were consistent in mole ratio in forming metal complex, The adsorbed metal ion was quantitatively recovered by HCI solution. Stability of M-DXHQ on XAD-7 resin increases as the electronegativity of the substituent decrease M-DCHQ-XAD-7<M-DBHQ-XAD-7<M-DIHQ-XAD-7.

Amberlite XAD-공중합체를 이용한 살리실산 및 크로마토그래피적 분리 그 유도체들의 액체

정용순,이택혁,문영자,이대운,Yong Soon Chung,Taik Hyuk Lee,Young Ja Moon,Dai Woon Lee 대한화학회 1989 대한화학회지 Vol.33 No.1

살리실산 및 그 유도체들의 Amberlite XAD-4와 XAD-7 수지 분리관에서의 역상 액체크로마토그래피적 용리거동이 고전적 방법과 현대적 고성능 액체크로마토그래피(HPLC)에 의하여 연구되었다. 고전적 크로마토그래피에서는 질산제 2철 용액의 농도를 0.010F 농도로부터 0.150F 농도까지 변화시키면서 50% 메탄올 수용액에서 머무름크기인자(k')를 측정함으로써 용리거동을 설명하였다. 한편, 고성능액체크로마토그래피에서는 pH 2.25와 293K에서 여러가지 비교적 저 농도의 질산제 2철 용액($2.5{\times}10^{-4}F$에서 $1.0{\times}10^{-3}F$까지)과 여러 농도의 메탄올 수용액을 용리액으로 k값들을 측정함으로써 살리실산 및 그 유도체들의 용리메카니즘을 설명하고, 이들의 분리에 대한 최적 조건을 발견하였다. 결과적으로, 철(III)이온 농도가 증가하면 log k'가 비례하여 감소하는 현상을 발견하였는데, 그 감소하는 기울기가 문헌에 보고된 철(III)-살리실산 및 그 유도체착물들의 안정도 상수값들과 관계 있음을 발견하였다. 살리실산유도체들의 몇가지 이성체들을 최적 조건에서 분리하였다. Reverse phase liquid chromatographic elution behaviors of salicylic acid and its derivatives were studied with classical and modern high-performance liquid chromatography(HPLC) using Amberlite XAD-4 and XAD-7 resin packed columns. Capacity factors(k') were determined in the comparatively high concentration(from 0. 010F to 0. 150F) of ferric nitrate-50% methanol solution to elucidate the elution behaviors with classical method. On the other hand, k's were measured in the various concentrations of methanol and ferric nitrate(from $2.5{\times}10^{-4}F\;to\;1.0{\times}10^{-3}F$) solution of pH 2. 25 and 293K with HPLC to explain the elution mechanism of them, and to find their optimum separation condition. As a result, it was found that log k's of salicylic acid and its derivatives were decreased with increasing the concentration of ferric ion, and the decreasing slopes of the compounds on the increasing ferric ion concentrations were related with each stability constant of ferric salicylates. Some isomers of derivatives of salicylic acid could be separated in the optimum condition.

희토류 이온(Er/Yb)이 도핑된 LaPO₄ 나노입자의 합성과 발광특성

오재석,이택혁,석상일,정하균,Oh Jae-Suk,Lee Tack-Hyuck,Seok Sang-Il,Jung Ha-Kyun 한국재료학회 2004 한국재료학회지 Vol.14 No.4

Due to the luminescence by$ Er ^{ 3+}$ activator, Er-doped $LaPO_4$ powders can be applied for optical amplification materials. In this study, $LaPO_4$:Er nanoparticles were synthesized in solution system using a high-boiling coordinating solvent and their properties were investigated through various spectroscopic techniques. The nanoparticles were to take a single phase of monazite structure by a X-ray diffraction analysis and to have the 5-6 nm of particles size with narrow size distribution by a TEM. And it was confirmed by the EA and FT-IR analyses that the surfaces of nanoparticles are coordinated with the solvent molecules, which will possibly keep from agglomerating between LaPO$_4$:Er nanoparticles. In the emission spectrum of $LaPO_4$:Er nanoparticle at NIR region, on the other hand, it was measured that the emission intensity is very weak, which is due to the transition from $^4$$I_{(13/2)}$ to $^4$$I_{(15/2)}$ of $Er^{3+ }$ion. It was interpreted that the weak luminescence of $LaPO_4$:Er is originated from the hydroxyl groups adsorbed on the surfaces of the nanoparticles, because OH group acts as an efficient quencher for the $^4$$I_{(13/2)}$ \longrightarrow $^4$$I_{(15/2)}$ emission of $Er^{3+}$ activator. But the co-doping of Yb$^{3+}$ as a sensitizer in this nanoparticle results in the increase of the emission intensity at 1539 nm due to the effective energy transfer from $Yb^{3+}$ to $Er^{3+}$ . In addition, the synthesized nanoparticles exhibited good dispersibility with some polymers and effective luminescence at NIR region.n.

금속이온 흡착 및 분리를 위한 킬레이트 시약-침윤수지에 관한 연구 (제1보). 8-Hydroxyquinoline-침윤수지

이대운,이택혁,박광하,Dai Woon Lee,Tack Hyuck Lee,Kwang Ha Park 대한화학회 1983 대한화학회지 Vol.27 No.5

The adsorption behavior of 8-hydroxyquinoline (8HQ) on Amberlite XAD-4 and-7 resins was investigated by measuring its distribution coefficients under various experimental conditions, such as shaking time, pH and concentration of methanol in the medium. The application of 8HQ-impregnated-XAD resins for the absorption and separation of metal ions was studied. The maximum adsorption of 8HQ on XAD resins was observed in the 30% methanol solution having pH range from 6.0 to 9.0. The impregnation capacities of XAD resins for 8HQ were 3.81${\times}$10-2mmol, 8HQ/g, XAD-4 resins and 2.60${\times}$10-2mmol, 8HQ/g, XAD-7 resin, respectively. The 8HQ-impregnated-XAD resins were stable in pH range from 6.0 to 10.0 and the amount of 8HQ leached from XAD-4 resin by eluting with hydrochloric acid(above 5M) was negligible. The optimum pH range for the adsorption of metal ions on 8HQ-impregnated XAD resin was also 6.0 to 10.0, and the adsorption mole ratio of metal ion to 8HQ were 1 : 2 for Cu(II), Cd(II) and Ni(II), and 1 : 3 for Fe(III) at the above pH range. It was found that the absorbed metal ions on 8HQ-impregnated-XAD resins were recovered quantitatively with 5M HCl and 8HQ-impregnated-XAD-4 resin could be reusable over 5 times without decrease in its impregnation capacity. 8-hydroxyquinoline의 Amberlite XAD-7 수지에 대한 최적 흡착조건의 매질용액은 pH 6.0~9.0의 30% MeOH 수용액이다. 이 매질 용액에서 XAD-4 및 XAD-7 수지에 대한 8HQ의 침윤량은 각각 3.81${\times}$10-2mmol 8HQ/g, XAD-4 resin와 2.60${\times}$10-2mmol 8HQ/g, XAD-7 resin이었다. 8HQ-XAD-4 및 8HQ-XAD-7 침윤수지는 pH 6.0-10.0 영역에서 안정하였으며, 특히 8HQ-XAD-4 수지의 경우에는 흡착된 금속이온의 회수에 사용되는 용리액인 HCl의 농도가 증가할 수록 안정도가 증가하였다. 8HQ-XAD 침윤수지에 대한 Cu(II), Cd(II), Ni(II), 및 Fe(III) 금속이온의 흡착은 pH 6.0~10.0 영역에서 최대 흡착을 보였으며, 금속이온의 흡착몰비(금속이온 : 8HQ)는 Cu(II), Cd(II), Ni(II)의 경우에는 1:2이었으며, Fe(III)의 경우는 1:3으로 나타났다. 8HQ-XAD 침윤수지에 흡착된 금속이온은 5M HCl로 용리하였을 때 정량적으로 회수되었으며, 8HQ-XAD-4 침윤수지는 5M HCl을 용리액을 사용하였을 때 침윤양의 감소없이 5회 이상 재사용이 가능하였다.