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RISS 인기검색어
- 검색키워드
- 저자 : 김준태 ( Seong Kyu Park (검색결과 16 건)
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1-Aza-15-Crown-5 합성수지 흡착제에 의한 우라늄(4) 이온의 흡착
박성규 ( Seong Kyu Park ),김준태 ( Joon Tae Kim ) 한국공업화학회 2002 공업화학 Vol.13 No.8
Resins were synthesized by mixing 1-aza-15-crown-5 macrocyclic ligand into styrene divinylbenzene (DVB) copolymer, which contains crossling of 1%, 2%, 4% and 20% by substitution reaction. The synthesis of these resins was confirmed by the content of chlorine, the element analysis and the IR-Spectrum. The effects of pH, time, crosslink of resins and dielectric constant of solvent on the adsorption of uranium ion by resin adsorbent were investigated. Uranium ion showed a great adsorption at pH higher than 3, and the adsorption equilibrium of metal ions was about two hours. In addition, the adsorptive selectivity of resin in ethanol solvent was UO_2^2+>Cu^2+>Sm^3+ in order. The adsorption of uranium ion was 1%, 2%, 4% and 20%, which corresponded to the order of crosslink and it was inversely proportional to the order of dielectric constant of solvents.
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Cryptand 21 합성수지를 이용한 금속 이온의 흡착 및 분리에 관한 연구
박성규,김준태 ( Seong Kyu Park,Joon Tae Kim ) 한국공업화학회 1995 공업화학 Vol.6 No.6
Resins with cryptand 21 macrocyclic ligand attached to chloromethylated styrene-1,4-divinylbenzene by substitution reaction were prepared and the effect of pH, metal concentration and cross-linkage of the matrix on the adsorption for UO₂^(2+), Ni^(2+) and Ce^(3+) was investigated. The metal ion was not adsorbed on the resins pH range below 3 and above pH 4, fast adsorption behavior was showed. The resin selectivity determined in ethanol matrix was in increasing order UO₂^(2+)>Ni^(2+)>Ce^(3+). In addition, these metal ion could be separated on the column packed with 1% crosslinked resin by pH 2.5 HN₃ as an eluent.
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거대고리 화합물을 이용한 금속 이온의 흡착 및 분리에 관한 연구
박성규,김준태,임현택 ( Seong Kyu Park,Joon Tae Kim,Hyun Taek Lim ) 한국공업화학회 1998 응용화학 Vol.2 No.1
Resins with 1-aza-15-crown-5 macrocyclic ligand attached to chloromethylated rene-1,4-divinylbenzene by substitution reaction were prepared and the effect of, metal concentration and cross-linkage of the matrix on the adsorption for UO₂²^+, ²^+ and Sm³^+ was investigated. The metal ion was not adsorbed on the resins pH ○ge below 3 and above pH 4, fast adsorption behavior was showed. The resin ectivity determined in ethanol matrix was in increasing order UO₂²+ $gt; Zn²^+ $gt; Sm³^+. addition, these metal ion could be separated on the column packed with 1% ○sslinked resin by pH 2.5 HNO₃ as an eluent.
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Cryptand 이온교환 수지를 이용한 우라늄(VI) 이온의 흡착
박성규,김준태,Park, Seong-Kyu,Kim, Joon-Tae 한국분석과학회 2004 분석과학 Vol.17 No.2
Cryptand ion exchange resins were synthesized with 1-aza-15-crown-5 macrocyclic ligand attached to styrene divinylbenzene (DVB) copolymer with crosslink of 1%, 2%, 5% and 10% by substitution reaction. The synthesis of these resins was confirmed by content of chlorine, element analysis, and IR-spectrum. The effects of pH, time, dielectric constant of solvent and crosslink on adsorption of uranium ($UO{_2}^{2+}$) ion were investigated. The uranium ion was showed fast adsorption on the resins above pH 3. The optimum equilibrium time for adsorption of metallic ions was about two hours. The adsorption selectivity determined in ethanol was in increasing order uranium ($UO{_2}^{2+}$), magnesium ($Mg^{2+}$), neodymium ($Nd^{3+}$) ion. The adsorption was in order of 1%, 2%, 5%, and 10% crosslink resin and adsorption of resin decreased in proportion to order of dielectric constant of solvents.
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전용구,김준태,박성규,Cheun, Young-Gu,Kim, Joon-Tae,Park, Seong-Kyu 대한화학회 1991 대한화학회지 Vol.35 No.6
The cationic polymerization of substituted oxethanes which have pendant energetic groups such as methoxy, azido, and nitrato are investigated theoretically using the semiempirical MINDO/3, MNDO, and AM1 methods. The nucleophilicity and basicity of substituted oxethanes can be explained by the negative charge on oxygen atom of oxetanes. The reactivity of propagation in the polymerization of oxetanes can be represented by the positive charge on carbon atom and the low LUMO energy of active species of oxetanes. The reaction of the energetic cyclic oxonium ion forms to the open chain carbenium ion forms is expected by computational stability energy of the oxonium and carbenium ion (about 10~20 kcal/mole) favoring the carbenium ion. The relative equilibrium concentration of cyclic oxonium and open carbenium ions is found to be a major determinant of mechanism, owing to the rapid equilibrium of these cation forms and the expectation based on clauclation that the prepolymer propagation step SN1 mechanism will be at least as fast as that for SN2 mechanism.
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Cryptand 계 합성수지를 이용한 금속 이온들의 흡착에 관한 연구
박성규(Seong Kyu Park),김준태(Joon Tae Kim) 한국공업화학회 2000 응용화학 Vol.4 No.2
The new ion exchange resin was synthesized from chloromethylated styrene-l,4-divinylbenzene with crown macrocyclic ligand by substitution reaction. The resin was prepared and the effect of pH, time, dielectric constant of solvent and crosslinked of the matrix on the adsorption for UO₂^(2+), Zn^(2+) and Cc^(3+) was investigated. The metal ion was not adsorbed on the resins pH range below 3 and above pH 4 fast adsorption behavior was showed. The resin selectivity determined in ethanol matrix was in increasing order UO₂^(2+)> Zn^(2+)> Ce^(3+). In addition, these metal ions was separated on the column packed with 1% crosslinked resin as an eluent.
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Crown 합성수지를 이용한 금속 이온들의 특성에 관한 연구
박성규(Seong Kyu Park),김준태(Kim Joon Tae),임현택(Lim Hyun Taek) 한국공업화학회 1998 응용화학 Vol.2 No.2
The new ion exchange resin was synthesized from chloromethylated styrene-l,4-divinylbenzene with crown macrocyclic ligand by substitution reaction. The resin was prepared and the effect of pH, time, dielectric constant of solvent and cross-linked of the matrix on the adsorption UO₂²^+,CO²^+ anD Nd³^+ was investigated. The metal ion was not adsorbed on the resins pH range below 3 and above pH 4 fast adsorption behavior was showed. The resin selectivity determined in ethanol matrix was in increasing order UO₂²^+$gt; Co²^+ $gt; Nd³^+. In addition, these metal ion was separated on the column packed with 1% crosslinked resin as an eluent.
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