황산(黃酸) 침출용액(浸出溶液)에서 Cyanex272, PC88A 및 Alamine336을 이용한 바나듐(V) 및 티타늄(Ti)의 용매추출(溶媒抽出)

안재우,안종관,김주엽,유정근,이상훈,김동진,Ahn, Jae-Woo,Ahn, Jong-Gwan,Kim, Ju-Yup,Yu, Jeong-Guen,Lee, Sang-Hun,Kim, Dong-Jin 한국자원리싸이클링학회 2007 資源 리싸이클링 Vol.16 No.3

황산용액중에서 바나듐 및 티타늄의 추출거동을 고찰하기 위하여 추출제로 Cyanex272, PC88A그리고 Alamine336를 추출제로 사용하였다. 용액의 pH 및 추출제의 농도 그리고 추출등온곡선에 대한 연구와 바나듐 및 티타늄의 혼합용액에서 두성분의 분리성에 대한 연구를 실시하여 바나듐 회수를 하기 위해 효과적인 추출제를 선정하고자 하였다. 실험 결과로부터 Alamin336이 바나듐의 추출효과가 가장 좋았고, 티타늄과의 분리성도 가장 우수하였다. A comparative study of the extraction behavior of vanadium and titanium in sulphate solutions using Cyanex272, PC88A and Alamine336 has been carried out. effect of pH in sulphate solutions, concentration of extractant and extraction isotherms has been studied. Solvent extraction separation studies of vanadium and titanium from the mixed solutions were also carried out in order to obtain a criterion for choosing the more effective extraction regent. From the experimental results, it was conformed that Alamine336 was good extractant to extraction of vanadium and separation from titanium from the mixed solutions.

염산용액(鹽酸溶液)에서 TBP 및 Cyanex923을 이용(利用)한 루테늄(III)의 유출(抽出).분리(分離)에 관한 연구(硏究)

안재우,이기웅,Ahn, Jae-Woo,Lee, Ki-Woong 한국자원리싸이클링학회 2011 資源 리싸이클링 Vol.20 No.2

Solvent extraction experiments were carried out to recover and separate Ru(III) from aqueous hydrochloric acid media using TBP and Cyanex923. The efficiency of the extraction was studied under various experimental conditions, such as concentration of HCl and NaCl, concentration of extractant in the organic phase and temperature. The extraction behavior of metal impurities, such as Pt, Bi, Sn, Fe, Pb and Cu in mixed solutions was examined. From the experimental studies, it was found that the Cyanex923 resulted in higher extraction percentage of Ru than TBP. However TBP was more effective for the separation of Ru and Pt, Bi, Sn in mixed solutions than Cyanex923. 염화루테늄 용액에서 루테늄의 분리 및 회수를 위한 기초 연구로 TBP 및 Cyanex923을 이용하여 루테늄의 용매추출 거동을 조사하였다. 루테늄의 추출율에 영향을 미칠 수 있는 수용액상의 염산농도 및 염소이온 농도, 유기상의 추출제 농도, 온도 등에 대해서 고찰하였고, 유기상으로 추출원 루테늄의 탈거거동에 대해서도 조사하였다. 또한 백금, 비스무스, 납, 구리, 철, 주석 등과의 혼합용액에서 염산농도에 따라 각 성분들의 추출거동을 조사하였다. 실험결과 루테늄의 추출을 위해서는 Cyanex923이 효과적이었다. 그러나 TBP를 사용할 경우 루테늄의 추출율은 낮으나 백금, 비스무스, 주석 등의 불순물을 제거하는 데는 효과적이었다.

염산에칭폐액으로부터 Alamine336에 의한 구리의 용매추출에 관한 연구

안재우,염재웅 한국자원리싸이클링학회 1997 資源 리싸이클링 Vol.6 No.3

염산계 에칭폐액으로부터 추출제로 Alamine336(Tri-n-octylamine)을 이용하여 용매추출법에 의해 구리를 회수하기 위한 연구를 행하였다. 주요 실험변수로는 염산농도 및 염소이온농도, 추출제의 농도, 유기상과 수용액상(폐액상)의 상비 등 구리이온의 추출에 영향을 미칠 수 있는 인자들에 대하여 실험을 하엿는데, 이 실험결과 추출제의 농도 및 상비가 구리의 추출에 큰영향을 미침을 알 수 있었고 또한 수용액상의 염산 및 염소이온의 농도가 증가할수록 구리의 추출률이 증가하였다. 한편 McCabe-Thiele diagram으로부터 구리성분의 연속추출공정에 필요한 이론적인 추출단수를 결정하였다. 유기상으로 추출된 구리성분은 탈거제로 물($H_2$O)을 사용함으로써 효율적으로 탈거가 가능하였고 탈거제의 온도가 증가할수록 구리성분의 탈거율은 증가하였다. A study has been made of the rccovery of copper (11) by solvent extraction with Alamine336 (Tri-n-oclylamine) as a extractant from hydrochloric etching solutions. The effect of extractant concentrations, hydrochloric acid, chloride Ion concentrations and phase ratio (organiclaqueaus) on copper extraction were studied. Experimental results showed that the concenl~atiano f extractant and the phase ratio strongly influenced the copper extraction, and the extraction percent of capper Increased at higher hydrochloric acid and chloride ion mncmhation. We proposed that the optimum extrachon stages of copper for continuous extraction process by analysidng thc McCabe-Thielc diagram. Stripping of copper from the loaded organic phases wn be accomplished by pure water (H, O) as a dripping reagent effectively. As the tcmpcrature is increased, thc stripping of copper is enhanced.

첨전법에 의한 FeCl₃ 용액으로부터 산화철(Fe₂O₃)제조 연구

안재우 대진대학교 첨단소재연구소 1998 첨단소재연구소논문집 Vol.1 No.-

The precipitation of Fe₂O₃ from ferric chloride solution was invesgated in autoclave experiments. The minimum temperature to form Fe₂O₃ in the absence of Fe₂O₃ seed is 125℃. But in the presence of Fe₂O₃ seed, Fe₂O₃ is precipitated at temperatures as low as 100℃. The amount of iron precipitated and the concentration of co-generated HCI increase as the initial concentration of ferric chloride increase from 0.025 to 0.3M Fe₂O₃. Futher increases in the FeCl₃ concentration have a negligible effect on the quantity of Fe₂O₃ precipitated or on the concentration of HCI generated. Increasing initial HCI concentrations, however, sharply reduce the amount of Fe₂O₃.

First Record of Ulva torta (Ulvales, Chlorophyta) in Korea

안재우,남기완 한국환경생물학회 2017 환경생물 : 환경생물학회지 Vol.35 No.3

A marine ulvalean species (Chlorophyta) was collected from Imgok, which is located on the eastern coast of Korea. This species is morphologically characterized by distromatic, filiform to strap compressed or tubular thallus. Many branches were found near the base, but lacked proliferations. Cells were longitudinally aligned in the younger part of the branch and were disordered in the older part of the branch. A cap-like parietal chloroplast with one or two pyrenoids was contained in each cell. In a phylogenetic tree based on ITS and rbcL sequences, this species was nested in the same clade as Ulva torta and U. clathratioides from Australia, but formed a sister clade to U. torta from Japan. However, the genetic divergence between them was included in an intraspecific variation range within Ulva. This finding suggests that U. clathratioides should be reduced to a synonym of U. torta. Accordingly, the Korean alga was identified as U. torta based on the morphological and molecular data. This investigation is the first record of U. torta in the Korean marine algal flora.

Ni-Zn-P 및 Fe-Zn-P 3원계 합금도금에 관한 헐셀 실험 연구

안재우,안종관 대진대학교 1995 大眞論叢 Vol.3 No.-

A experimental study on the electrodeposition of Ni-Zn-P and Fe-Zn-P alloy onto a steel has been carried out using a Hull-cell apparatus. The results show that the optinum current efficency of Ni-Zn-P and Fe-Zn-P alloy was 80mA/cm^(2), 120mA/cm^(2) respectively. And the desirable cell distance of Ni-Zn-P and Fe-Zn-P alloy was 6cm, 6.5cm. For the alloying of P, it was obtained that the optimum concentration of NaH_(2)PO_(2) was 20 g/ℓ.

금속파면의 프랙탈적 해석

안재우,전채홍,안종관 대진대학교 1997 大眞論叢 Vol.5 No.-

In the fracture of materials, the art of fractography is well established. However there are few quantitative rules that related the morphology of the fracture surface to the properties of the material, particularly its resistance to fracture, or to the circumstances of the fracture, sudden and catastrophic, or gradual by fatigue, etc. Fractal geometry is used in order to these quantitative relation. Fracture surface is expressed by the fractal. The fractal dimension is related to the special feature of microstructure. And fracture profiles that are generated by midpoint displacement method are in aggrement with the measured profiles.

乳化型 液體膜法에 의한 코발트 抽出에 관한 모델링 硏究

安在禹,梁在雄 대진대학교 1994 大眞論叢 Vol.2 No.-

A new mathematical model for analyzing the extraction of cobalt by liquid surfactant membrane has been presented. The model assumes that mass transfer of cobalt ions in the organic membrane into the W/O emulsion and the stripping rate of cobalt ions into the internal aqueous phase. The leakage effect of internal phase due to membrane rupture and the swelling effect were also considered in the mathematical treatment. The batch extraction of cobalt using D₂EHPA as a carrier was carried out under various experimental conditions It is shown that the extraction rate can be satisfactorily simulated by the present model.

Mixer-Settler를 이용한 연속공정에 의한 니켈과 코발트의 추출

안재우,안종관,이만승 대진대학교 첨단소재연구소 2001 첨단소재연구소논문집 Vol.4 No.-

Extraction behaviors of Co and Ni in hydrochloric acid solutions by Alamine336(Teritary amine) have been investigated in mixer-settler. The feeding aqueous solution contained 5.0g/L nickel and 0.7g/I, Co in 5.0M hydrochliric acid solution. The organic phase being used for extractant comprised 20 vol. % Alamine336(Teritary amine) in Xylene. The 10 mixer-settler units of count current type consist of 3 extraction, 2 scrubbing, 3 stripping and 2 washing sections. The extraction percent of Co was 99 % but Ni was not extracted during 3 steps. Ni co-extracted with co was removed in 2 steps of scrubbing section by 6M hydrochloric acid solution from organic phase. Over 92% of Co from organic phase was stripped by 0.1M hydrochloric acid solution in 2 volume ratio of organic and aqueous phase. After stripping, the organic phase that was washed by 3.0 M hydrochloric acid solution in 2 volume ratio of organic and aqueous phase could be recycled for the organic solution.

코발트 정광(精鑛)으로부터 유기산(有機酸)을 이용(利用)한 Co, Cu, Ni, Al, Fe의 화학적(化學的) 침출(浸出)

안재우,안효진,김명운,Ahn, Jae-Woo,Ahn, Hyo-Jin,Kim, Meong-Woon 한국자원리싸이클링학회 2011 資源 리싸이클링 Vol.20 No.6

코발트 정광으로부터 코발트와 구리의 회수를 위한 환경친화적인 침출공정 개발의 일환으로 유기산을 침출제로 사용하여 각 금속의 침출 거동에 대하여 기초 연구를 실시하였다. 주요 실험 변수로는 유기산 종류 및 농도, 반응 시간 및 온도 그리고 고액농도비 등 코발트와 구리의 침출에 영향을 미칠 수 있는 인자들에 대하여 고찰하여 최적 조건을 얻고자 하였다. 실험 결과 유기산중 구연산이 코발트 및 구리의 침출에 효과적이었다. 한편, 구연산을 이용한 침출실험 결과 구연산의 농도가 2.0M에서 코발트 99 %, 구리 95%, 니켈 70%의 높은 침출율을 나타내었다. 또한, 과산화수소는 약 3 vol. % 정도 첨가하는 것이 적당하였고, 최적 반응온도는 $70^{\circ}C$이었다. Enviromental friendly leaching process for the recovery of cobalt and copper from the cobalt concentrate was investigated by organic acids as a leaching reagent. The experimental parameters, such as organic acid type, concentrations of leachant, time and temperature of the reaction as well as the solid to liquid ratio were tested to obtain the optinum conditions for the leaching of cobalt and copper. The results showed that citric acid was the most effective leaching reagent among the organic acids used in this experiment. About 99% of cobalt, 95% of copper and 70% of nickel was dissolved by 2.0 M of citric acid. Addition of 3.0 vol.% of hydrogen perioxide was effective to enhance the leaching efficiency and the optinum temperature was found to be about $70^{\circ}C$.