• Title/Summary/Keyword: Cl$^{[-10]}$ 이온

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Active Transport of Anions through Synthesized Polymer Membrane with Pyridine as Fixed Carrier (피리딘 고정전달자를 함유한 합성 고분자막을 통한 음이온의 능동전달)

  • 이용현;한정우박돈희조영일
    • KSBB Journal
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    • v.6 no.3
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    • pp.241-247
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    • 1991
  • The Poly (4-vinyipyridine-co-styrene) membrane containing Pyridine as fixed carrier was synthesized and characterized. And the active transport mechanism of Cl- and $CCl_3COO^-$ with changing concentration of $H^+$ and $OH^-$ was investigated. $CCl_3COO^-$ was transported not only by a symport mechanism with $H^+$ transfer but also by an antiport mechanism with $OH^-$transfer, while $Cl^-$ was transported only by a symport mechanism with $H^+$ transfer. Observing the initial flux of anions, salt formation constant between ions and membrane (K), and diffusion coefficient in membrane (D) were calculated as follows: for $Cl^-, \;K=4.60{\times}10^2\;mol^{-1}{\cdot}\textrm{cm}^3, \;D=1.57{\times}10^{-3}{\textrm{cm}^2/h$ and for $CCl_3COO^-, \;K=1.l0{\times}10^4\;mol^{-1}{\cdot}\textrm{cm}^3, \;D=1.14{\times}10^{-4}{\textrm{cm}^2}/h$.

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Pressure Dependence on the Aquation of s-cis-[Co(ee)$Cl_2$]+ and s-cis-[Co(eee)$Br_2$]+ ions (s-cis-$[Co(eee)Cl_2$]^+ 및 s-cis-$[Co(eee)Br_2]^+ $착이온의 수화반응에 미치는 압력의 영향)

  • Jong-Jae Chung;Sung-Oh Bek
    • Journal of the Korean Chemical Society
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    • v.32 no.4
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    • pp.318-322
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    • 1988
  • We studied the aquation reaction of s-cis-$[Co(eee)Cl_2]^+$ and s-cis-$[Co(eee)Br_2]^+$ complex ions under the various temperatures and pressures. In these complexes eee is $NH_2-CH_2CH_2-S-CH_2CH_2-NH_2$. The rate law of the aquation reactions of these two complexes obeys $Rate = k_{obsd}$[CO(III)], where rate constants of s-cis-$Co(eee)Cl_2]^+$ and s-cis-$[Co(eee)Br_2]^+$ respectively are $0.687{\times}10^{-4}$ $sec^{-1}$ and $4.10{\times}10^{-4}$ $sec^{-1}$ in condition of 0.1M $HClO_4\;and\;40^{\circ}C$. In the same condition, the activation entropies of s-cis-[Co(eee)$Cl_2$]+ and s-cis-(Co(eee)Br_2$]+ complexes respectively are -15.5 eu and -7.54eu, and the activation volumes are $-4.6cm^3mole^{-1}$ and $-4.2cm^3mole^{-1}$. From these data, we could infer the mechanism of the aquation reaction as the interchange dissociation (Id) mechanism.

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Effects of Ion Specificity on the Expansion Behavior of Polymer Gel with Phenyl Ring (Phenyl 고리를 갖는 고분자 겔의 팽윤거동에 대한 이온 특성화 효과)

  • Ahn, Beom-Shu
    • Journal of the Korean Applied Science and Technology
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    • v.29 no.2
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    • pp.278-285
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    • 2012
  • Effects of ion species on the expansion behavior of Poly(styrene sufonic acid)(PSSA) hydrogel were investigated in aqueous solution of selected anions, cations and hydrophobic ions. The deexpansion extent of Poly(stylene sulfonic acid) gel follow the sequence $SCN^-$<$Br^-$<$Cl^-$<$F^-$ in low concentration solutions due to the destabilization of anions to hydrogen bond between ${SO_3}^-$ and water. The deexpansion in cations followed the sequence of counterion interactions between ${SO_3}^-$ and cations. It was discussed the effects of ions on the hydrogen bonding through ${SO_3}^-$ and phenyl ring in salt solutions. Other interactions, such as the cation-${\pi}$ interaction, hydrophobic interaction, and dispersion force, contributed to the ion specific swelling of PSSA hydrogel.

Ion Permeation of PVA/Gelatin Blend Membrane Prepared Under High Electric Field (고전장하에서 제조된 PVA/Gelatin 블렌드막의 이온투과 특성)

  • Huh, Yang-Il;Joe, Jeong-Woong
    • Polymer(Korea)
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    • v.30 no.6
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    • pp.568-571
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    • 2006
  • Poly(vinyl alcohol) (PVA)/gelatin(GEL) blend membranes were prepared under a high electric field, and their swelling and ion permeation behaviors were investigated. For alkali metal salts such as LiCl, NaCl and KCl, the permeability coefficients were increased until the electric field of 10 kV due to the decreased tortuosity, whereas they were decreased over 10 kV owing to the increase of the degree of crystallinity. The swelling ratios of the blend membranes showed the minimum values at pH 6, while the permeability coefficients exhibited the maximum values at the same condition. The minimum swelling ratios result from the repulsion effect between charged groups in acidic or basic regions, and the maximum permeabilities result from Donnan exclusion effect in the same regions. Especially, the per-meability coefficient for KCl of the membrane increased steeply to five times at $40^{\circ}C$ than below $35^{\circ}C$.

Preparation and Characterization of Elastomeric Solid Electrolyte Based on $PEO-EDA-LiClO_4$ Blends ($PEO-EDA-LiClO_4$ 블렌드계 탄성체 전해질의 제조와 특성)

  • Chang, Young-Wook;Joo, Hyun-Seok
    • Elastomers and Composites
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    • v.39 no.1
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    • pp.36-41
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    • 2004
  • Solid polymer electrolytes were prepared by UV irradiation of the blends consisting of poly(ethylene oxide)(PEO), epoxy diacrylate(EDA) and LiClO_4$. Conductivities of the electrolyte films were measured as a function or blend composition, salt concentration and temperature. The electrolyte having the composition of poly(ethylene oxide) (70% by weight)/epoxy diacrylate (30% by weight) with mole ratio of 10 of ethylene $oxide/Li^+$ exhibited a high ionic conductivity of $1.2{\times}10^{-5} S/cm$ at $25^{\circ}C$. This blend is transparent and shows elastomeric properties. Morphological studies by means of differential scanning calorimetry, X-ray diffraction and polarized optical microscopy indicated that the cured epoxy chains in the blends inhibit the crystallization of poly (ethylene oxide) and thereby induce the blend systems to be completely amorphous in certain compositions.

Thermal and Electrical Properties of Poly(vinylidenefluoride-hexafluoropropylene)-based Gel-Electrolytes (Poly(vinylidenefluoride-hexafluoropropylene)계 겔-전해질의 열적, 전기적 특성)

  • 김영완;최병구;안순호
    • Polymer(Korea)
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    • v.24 no.3
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    • pp.382-388
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    • 2000
  • Polymer electrolyte films consisting of poly(vinylidenefluoride-hexafluoropropylene) (PVdF-HFP), LiClO$_3$ and a mixture of ethylene carbonate (EC) and ${\gamma}$-butyrolactone (GBL) were examined in order to obtain the best compromise between high ionic conductivity, homogeniety, dimensional and electrochemical stability. Measurements of ionic conductivity, differential scanning calorimetry and linear sweep voltammetry have been carried out for various compositions. The highest conductivity of 3.8$\times$10$^{-3}$ S$cm^{-1}$ / at 3$0^{\circ}C$ were obtained for a film of 30(PVdF-HFP)+7.8LiClO$_4$+62.2EC/GBL. From the DSC study, it has been found that the PVdF-HFP gels are stable up to 10$0^{\circ}C$, and the salt lowers the melting temperature of crystalline part of PVdF by interacting sensitively with polymer segments. When Lithium metal is in contact with the gel films, it tends to undergo corrosion and the reaction products accumulate resulting in the formation of a passive film on Li electrode. As the aging time progresses, the interfacial resistance increases continuously. Anodic stability is measured to extend up to about 4.5 V vs. Li.

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The study of high chloride in the coastal area of Cheju island (제주도 해안지역 고염분 현상에 대한 고찰)

  • 한규언;신희섭
    • The Journal of Engineering Geology
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    • v.10 no.2
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    • pp.150-171
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    • 2000
  • In the Cheju Island, there are high salinity water yield in the coastal area. There are various reason; the main reason is low-groundwater level by the structure of geology, and over-yielding etc. This study analysis water quality, the distribution of high salinity wells. 16 sample well logged the electronic geology survey. As result of distribution of Cl$^-$ is the East Area is high than other areas. Water quality test data divides 6 group by sea level of well bottom: over Om, Om~-1Om, -10~-20m, -20~-30m, -30~-40m, under -40m. According collect data of Kriging, and logged the electronic geology survey, and other survey are related chlorine(Cl$^-$). The map of Cl$^-$ distribution was made. Bukcheju Gun, Hallim Up, there are 2 wells prevent high salinity water. Both of well are effective grout sill salinity water intrusion aquifer.

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Differential Pulse Voltammetric Determination of Iron(II) ion with a Nafion-Ethylenediamine Modified Glassy Carbon Electrode (Nafion-ethylenediamine이 수식된 유리탄소전극에 의한 시차펄스전압전류법으로 철(II) 이온의 정량)

  • Kyong Wone Kim;Hee Cheol Kim;Sung-Hyun Kim;Byung Ho Park;Yeon Hee Kim;Kyong Nam Kim;Yong Chun Ko
    • Journal of the Korean Chemical Society
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    • v.47 no.2
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    • pp.115-120
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    • 2003
  • Determination of iron(II) ion with a perfluorinated sulfonated polymer(nafion)-ethylenediamine(en) modified glassy carbon electrode was studied. It was based on the chemical reactivity of an immobilized layer(nafion-en) to yield complex $[Fe(en)_3]^{+2}$. The oxidation peak potential by differential pulse voltammetry(DPV) was observed at 0.340${\pm}$0.015 V(vs. Ag/AgCl). The linear calibration curve was obtained in iron(II) ion concentration range $5{\times}10^{-6}{\sim}0.2{\times}10^{-3} M(0.28{\sim}11.17\; mg/L)$, and the detection limit(3s) was $1.89{\times}10^{-5}$M(1.056 mg/L).

Chloride Ion Effects on Anodic Dissolution of Copper in Aqueous NaCl Solutions under Argon Atmosphere (아르곤 분위기의 NaCl 수용액에서 구리의 산화 용해반응에 미치는 염화이온의 영향)

  • Chon, Jung-Kyoon;Kim, Youn-Kyoo
    • Journal of the Korean Electrochemical Society
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    • v.11 no.3
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    • pp.159-164
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    • 2008
  • We investigated chloride ion effects on anodic dissolution of copper using potentiodynamic method, cyclic voltammtery, chronoamperometry and chronocoulometry. The anodic dissolution reaction of copper in NaCl solution under argon atmosphere is $Cu+2Cl^{-}{\rightleftharpoons}{CuCl_2}^{-}+e^-$ and chloride ion adsorption process in copper surface can be explained by Temkin isotherm.

Basic Study for Development of Denitrogenation Process by lon Exchange I. Batch Experiment (이온교환법에 의한 탈질소공정개발의 기초연구 I. 회분식 실험)

  • Chae, Yong-Gon;Lee, Dong-Hwan;Kim, Jang-II;Yoon, Tae-Kyung;Ju, Chang-Sik;Lee, Min-Gyu
    • Journal of Life Science
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    • v.7 no.2
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    • pp.73-78
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    • 1997
  • Ion exchange performence to remove nitrate in water studied using commercially available strong vase anin exchange resin of $Cl^{-}$ type in the batch reactors. Anion exchange resin was more effective than activated carbon or zeolite. With large resin amount or high temperature or low initial concentration, nitrate removal characteristics for a typical gel-type resin was increased. The curves showed the generally accepted selectivity sequence as ${SO_4}^{2-}>{No_3}^->NO_{2-}>{HCO_3}^-$.

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