• Proceedings of the KAIS Fall Conference
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• 2002.05a
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• pp.137-139
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• 2002

이온교환은 액체상 이온과 고체상 이온간의 화학반응이며 연수 및 탈염공정, 특정물질의 제거 및 회수, 토양을 통한 이온성 물질의 이동에서 널리 이용되고 있다. 이온교환수지는 이온교환시 원자가가 높을수록, 수화반경이 작을수록, 이온농도가 낮을수록 증가한다. 본 연구는 이온교환수지에 대한 평형실험을 선택도가 칼럼실험에 적용되는지 조사하였다. 이 실험치 결과에서 음이온 교환수지의 선택도 순서는 OH/sup -/ < F/sup -/ < HCO₃/sup -/ < Cl/sup -/ < Br/sup -/ ≤ No₃/sup -/ < So₄/sup 2-/ 이였으며, 음이온 칼럼 교환도 동일하였다. 또한 바탕 양이온의 가수가 높을수록 이온교환이 빠르게 진행됨을 알 수 있다.

• Proceedings of the Korean Nuclear Society Conference
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• 1998.05b
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• pp.415-420
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• 1998

시판중인 대표적 유·무기이온교환수지를 이용하여 방사성폐액의 주 방사성핵종인 코발트와 세슘에 대하여 방사성패액에 함유되어 있는 대표적 일반이온인 나트륨이온이 이들의 이온교환에 미치는 영향을 분석하였다. 나트륨 존재 하에서 세슘이온에 대한 선택도와 수지단위 부피당 폐액 처리 부피는 무기이온교환수지인 DT 30과 Durasil 230이 가장 높으며 반면에 유기이온교환수지는 두 수치 모두 낮아서 유기이온교환수지는 저농도의 나트륨 이온을 갖는 증발기 응축수의 처리에는 적합하나 나트륨이온의 농도가 비교적 높은 폐액처리에는 적합하지 않으며, 또한 코발트 제거 면에서는 무기이온교환수지인 DT 10 보다 유기이온교환수지인 Amberlite IRN 77이 바람직하다는 결론을 얻었다.

• Applied Chemistry for Engineering
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• v.27 no.6
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• pp.633-638
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• 2016

In this study, we used three kinds of commercially available cation, anion, and mixed-ion exchange resins to separate radioactive ions from a polluted water containing Cs, I, and other radioactive ions. The experiment was conducted at a room temperature with a batch method, and a comparative analysis on the decontamination ability of each resin for the removal of Cs and I was performed by using different quantities of resins. The concentration was analyzed using ion chromatography and the ion exchange resin product from company D showed an overall high ion exchange ability. However, for most of the experiments when the amount of ion exchange resin was decreased, the decontamination ability of the resins against mass increased. When the mass of company D's cation exchange resin was small, the ion exchange ability against Cs and I ions were measured as 0.199 and 0.344 meq/g, respectively. When the mixed ion exchange resin was used, the ion exchange ability against I ions was measured as 0.33 meq/g. All in all, company D's ion exchange resins exhibited a relatively higher ion exchange ability particularly against I ions than that of other companies' exchange ions.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.4
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• pp.727-732
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• 2006

The object of this study was to investigate the influence of composition and concentration of electrolyte, ratio of cation to anion exchange resin of mixed ion exchange column in the performance of ion exchange. Also this work examined the removal capability of suspended solids by ion exchange resin and the effect of particule on the characteristics of ion exchange. Breakthrough time was extended as the amount of ions and particles present in liquid was decreased. The case of anion, the breakthrough sequence is $Cl^{-}, but the case of cation, the breakthrough sequence is $Na^{+}. As for the ratio of cation to anion exchange resin of 1:2, the breakthrough time was prolonged compared with that of 1:1 and 1:3. For the electrolyte of equal concentration containing suspended solid, breakthrough time was contracted less than 20%. It results in the increase in the removal capacity of cation exchange resin. For the higher ratio of cation exchange resin, suspended solids are shorten the cation's breakthrough time so that the runtime of ion exchange resin tower is increased.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2015.11a
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• pp.219-220
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• 2015

주석도금폐액으로부터 이온교환수지를 이용하여 주석을 회수하는 연구를 하였다. 주석 흡착이 가능한 3종류의 이온교환수지를 사용하여 기초 실험한 결과 tertiary기능기를 가진 이온교환수지는 주석을 흡착하지 못하였고, iminodiacetic 기능기를 가진 이온교환수지는 주석의 흡착률은 높으나, 불순물 함량이 높았으며, ethylhexyl-phosphar의 기능기를 가진 이온교환수지는 주석의 흡착률은 낮으나 pH 조절에 따라 불순물의 제어가 가능하였다.

• Journal of the Korean Electrochemical Society
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• v.17 no.2
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• pp.94-102
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• 2014

Cation exchange membrane (Nafion) was modified to reduce the vanadium ion permeation through the membrane and to increase the vanadium redox flow battery (VRB) system performance by coating the graphene oxide (GO) which has nano-plate like morphology. Modified membrane properties were studied by measuring the ion exchange capacity (I.E.C), water uptake and proton conductivity. The thickness of the coated layer on the surface of the Nafion membrane was observed as $0.93{\mu}m$ by SEM. Proton conductivity and vanadium ion permeability of the modified membrane were decreased to 27% and 25% compared to that of the commercial Nafion membrane respectively. VRB single cell performance test was performed to compare the system performance of the VRB applied with commercial Nafion membrane and modified membrane. VRB system applied with modified membrane showed higher coulombic efficiency and energy efficiency than the VRB system applied with the commercial Nafion membrane due to the reduction of the vanadium ion permeation. From these result, we could suggest that the membrane modification by coating the GO on the surface of the Nafion membrane could be one of the promising strategies to reduce the vanadium ion permeation and to increase the VRB system performance effectively.

• Proceedings of the KAIS Fall Conference
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• 2006.05a
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• pp.599-601
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• 2006

본 논문에서는 용액의 농도가 이온교환 특성에 미치는 영향을 조사하기 위하여 농도는 $Na^+\;50$, 125, 250ppm, $Cl^-\;165$, 315, 610ppm, 입자성 물질의 유입 농도 0ppm, 유속 500ml/min, 이온교환 수지는 ROHM&HAAS IR 120 양이온 수지와 ROHM&HAAS IRA 402 음이온 수지를 사용하였다. 수지탑 배열은 혼상-혼상-음이온 수지탑 순으로, 이온교환 수지탑의 양 음이온교환 수지의 조성 비율은 1:2 로 실험한 결과 이온교환 수지탑 성능은 유입 용액 성분 및 농도에 영향을 받는 것으로 나타났다. 이온교환 수지탑 배열 순서에 따라 파과시점이 연장되며, 파과순서는 음이온의 경우 $Cl^-\;<\;NO_3\;^-\;<\;F^-$, 양이온의 경우 $Na^+\;<\;K^+\;<\;Ca^{2+}$ 순 이였으며, 용액의 농도가 증가할수록 파과시간이 단축되었다.

• Journal of the Korean Chemical Society
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• v.25 no.5
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• pp.300-305
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• 1981

The soy bean oil cakes and perillar oil cakes are phosphorylated and sulfonated to be used as ion exchangers. There 40-60mesh cations exchanges have bean tested on the capacity of ion exchange, the adsorption and distribution coefficients of several metal ions in various concentrations of binary solution mixture, hydrochloric acid and alcohol. From there experiments, the following results are concluded. The ion exchange capacity of ion exchangers are higher than 4 meq/g. The adsorption of metal ions on ion exchangers are increased generally as pH is increased, especially Co(II) on sulfonated soy bean oil cake. The distribution coefficients of various metal ions are decreased as the number of branches of carbon and hydroxyl groups are increased. There show that the stereo-isomerism of alkyl group or attraction of ligand have influenced upon various metal ions. Consequently it is deduced that there ion exchanges from soy bean oil cake and perillar oil cake resemble in properties to current ion exchangers.

• Journal of the Korean Chemical Society
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• v.29 no.2
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• pp.164-171
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• 1985

The salicylic acid-formaldehyde condensed copolymer (SAF) and the 3-carboxy-4-hydroxy benzyl methacrylate divinylbenzene copolymer (CHBM-DVB) were synthesized. The capacities of SAF and CHBM-DVB ion exchangers were 4.6meq/g and 3.9 meq/g, respectively. The adsorption of several heavy metal ions on these weakly acidic ion exchangers and the property of ion exchanger were discussed. The distribution coefficients in hydrochloric acid solution and the elution behavior of several heavy metal ions were also discussed.

• Polymer(Korea)
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• v.26 no.5
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• pp.575-581
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• 2002

Heterogeneous ion exchange membranes were prepared by mixing polyethylene as matrix with bead and fibrous anionic ion exchangers at different mixing ratio. Generally, ion exchange capacities were increased with increasing the ratio of the fibrous ion exchanger content. The highest ion exchange capacity of the membrane was 1.86 meq/g at 30wt% IXF (ion exchange fiber) in the membrane. The water uptake, fixed ion concentration, and ion transport number of the membrane increased with increasing the content of the fibrous ion exchanger. However, the electrical resistivity of the membrane was decreased with increasing the content of the fibrous ion exchanger. The lowest electrical resistivity of 5$\Omega$/$\textrm{cm}^2$ was observed at 30 wt%of IXF.