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이만승,이광섭,이진영,김성돈,김준수 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.10
Solvent extraction experiments of Sm were performed from chloride solution with PC88A and saponified PC88A. Solvent extraction reaction of Sm with PC88A and the corresponding equilibrium constant were evaluated from the experimental and ionic equilibria data as follows Sm^(3+)_(aq)+ 1.5H₂A_(2,org)= SmA_(3,org)+ 3H^(+)_(aq) , K = 0.33. The predicted distribution coefficients of Sm agreed well with the experimental results. The distribution coefficients of Sm with saponified PC88A and the values of equilibrium pH depended on the initial extraction conditions. When the concentration of PC88A was in excess of that of Sm, saponification of PC88A greatly enhanced the extraction of Sm. (Received June 21, 2004)
비누화 PC88A에 의한 NdCl₃와 SmCl₃용매추출의 화학모델
이만승,이광섭,이진영,김성돈,김준수 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.10
A chemical model was developed to estimate equilibrium constant for the solvent extraction of Nd and Sm from chloride solution with saponified PC88A. The model could be employed to predict the distribution coefficient of metal from the initial extraction conditions. The model consisted of chemical equilibria, mass balance, charge balance and solvent extraction reaction. By applying the model to the experimental conditions and data, equilibrium constants for the solvent extraction of Nd and Sm were obtained. The effect of the saponification of PC88A on the extraction of Nd was explained in terms of the equilibrium constant obtained in this study and the change of equilibrium pH. The predicted distribution coefficients of Nd and Sm agreed well with those measured. (Received July 14, 2004)
이만승,이광섭 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.8
Solvent extraction equilibria of FeCl_(3) from chloride solutions with TBP were analyzed by considering chemical reaction, mass balance, charge balance and extraction reaction. The activity coefficients of solutes in the aqueous phase were calculated by Bromley equation. Extraction reaction of FeCl_(3) with TBP in the experimental range of this study was determined from the dependence of the distribution coefficient of FeCl_(3) on the chloride ion concentration. By applying ionic equilibria to the results of solvent extraction, equilbrium constant of the extraction reaction was estimated to be 3.43×10^(2). The equilibrium concentrations of solutes in both phases after extraction could be calculated with the ionic equilibria developed in this study. The predicted concentrations of Fe in the aqueous phase after extraction agreed well with those experimentally measured.
염산용액에서 비누화 PC88A에 의한 용매추출로 Gd와 Sm의 분리
이만승,이광섭,이진영,김성돈,김준수 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.5
Solvent extraction experiments have been performed to separate Gd and Sm from chloride solution with PC88A and saponified PC88A. The effects of extraction conditions on the distribution coefficients of Gd and Sm were investigated. The distribution coefficients of Gd were higher than those of Sm in the experimental ranges of experimental conditions of this study. A solvent extraction model was developed to predict the distribution coefficients of metals and separation factor between Gd and Sm from the initial extraction conditions. The measured distribution coefficients of Gd and Sm with PC88A and saponified PC88A showed good agreements with the predicted values. (Received March 3, 2005)
Solvent Extraction of Gd from Chloride Solution with PC88A
Lee, Man-Seung,Lee, Gwang-Seop,Lee, Jin-Young,Kim, Sung-Don,Ahn, Jae-Woo,Kim, Joon-Soo The Japan Institute of Metals 2005 MATERIALS TRANSACTIONS Vol.46 No.2
<P>Solvent extraction experiments of Gd from chloride solution with PC88A were conducted at different extraction conditions. Solvent extraction reaction was identified from the experimental results using a graphical method, and the corresponding effective equilibrium constant was determined by analyzing the ionic equlibria in a GdCl<SUB>3</SUB> solution. In the experimental ranges investigated in this study, <I>i.e.</I>, [GdCl<SUB>3</SUB>]≤0.3 kmol/m<SUP>3</SUP>, [PC88A]<SUB>org</SUB>≤3.0 kmol/m<SUP>3</SUP> and initial pH≤2.3, solvent extraction reaction of Gd with PC88A and the corresponding effective equilibrium constant were obtained as follows Gd<SUP>3+</SUP>+2H<SUB>2</SUB>A<SUB>2,org</SUB>=GdA<SUB>3</SUB>HA<SUB>org</SUB>+3H<SUP>+</SUP>, <I>K</I><SUB>ex,eff</SUB>=2.8×10<SUP>−1</SUP>.</P>
Solvent Extraction of Sm from Chloride Solution with PC88A and Saponified PC88A
Lee, Man-Seung,Lee, Gwang-Seop,Lee, Jin-Young,Kim, Sung-Don,Kim, Joon-Soo The Japan Institute of Metals 2005 MATERIALS TRANSACTIONS Vol.46 No.1
<P>In this study, solvent extraction experiments of Sm from a chloride solution with PC88A and with partially saponified PC88A were performed. The extraction reaction of Sm with PC88A was identified from the experimental data using a graphical method. A chemical model was then developed to predict the distribution coefficients of Sm for its extraction with the saponified PC88A. In the experimental ranges conducted in this study, the equilibrium constants for the solvent extraction of Sm with PC88A and with the saponified PC88A were estimated through an analysis of the ionic equilibria.</P>
섬국수나무와 섬괴불나무의 삽목증식에 미치는 토양 및 PGRs 처리 효과
이수광 ( Su Gwang Lee ),이동준 ( Dong Jun Lee ),김효연 ( Hyo Yeon Kim ),구자정 ( Ja Jung Ku ),김현준 ( Hyeon Jun Kim ),정회석 ( Hea Seok Jeong ),신운섭 ( Un Seop Shin ),이기철 ( Ki Cheol Lee ),김현진 ( Hyun Jin Kim ),김성식 ( Sung 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-
본 연구는 희귀식물 섬국수나무(Physocarpus insularis (Nakai) Nakai)와 섬괴불나무(Lonicera insularis Nakai)의 삽목증식에 미치는 토양 및 PGRs의 영향을 살펴보기 위해 수행되었다. 삽목토양은 녹소토와 펄라이트로 달리하였으며, PGRs는 IBA, NAA 100 ppm 한 시간 침지처리, 그리고 루톤분말 처리의 4가지를 달리하였다. 그 결과 섬국수나무는 녹소토 대조구와 루톤 처리구에서 29%의 가장 높은 발근율을 나타내었다. 또한 대조구에서 뿌리수(4.1개), 뿌리길이(5.8 cm) 및 지하생중량(33mg)이 가장 우수하게 나타나 섬국수나무의 삽목증식에는 PGRs처리가 부정적인 영향을 미치는 것으로 생각된다. 반면 섬괴불나무는 녹소토 조건에서 대조구(25%)에 비해 NAA 침지처리(82%)시 발근율이 유의적으로 향상된 결과를 나타내었다. 특히 NAA 100 ppm 침지처리시 뿌리수(7.3개), 뿌리길이(16.9 cm) 및 지하생중량(195 mg)이 가장 우수하게 나타나 녹소토 조건과 NAA 100 ppm 침지처리가 섬괴불나무 삽목증식에 적합한 처리조건인 것으로 판단된다. This study was conducted to investigate the propagation characteristics of Physocarpus insularis (Nakai) Nakai and Lonicera insularis Nakai. The treatment of rooting soil type(Kanumatsuchi, perlite) and PGRs(Rootone, 100 ppm of IBA or NAA). As a result, the highest rooting rate(29%) of P. insularis was obtained from the control and rootone in Kanumatsuchi. And best quality of cutting growth characteristics of P. insularis under control with number of root(4.1), root length(5.8 cm) and root weight(33 mg). Therefore, PGRs were negative effects on cutting of P. insularis. On the other hand, 100 ppm NAA treatment showed the highest rooting rate(82%) than control(25%) of L. insularis with cutting growth characteristics of the number of root(7.3), root length(16.9 cm) and root weight(195 mg) in Kanumatsuchi. A result indicated that treatment 100 ppm NAA and Kanumatsuchi were best treatment in increasing percentage of rooting and other cutting growth characteristics of L. insularis.