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Volume 47 (1993)
- Issue 6 Pages 359-
- Issue 5 Pages 291-
- Issue 4 Pages 200-
- Issue 3 Pages 123-
- Issue 2 Pages 59-
- Issue 1 Pages 4-
Volume 47, Issue 5
Displaying 1-8 of 8 articles from this issue
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Michihiro AKIBA, Tadahiro MORI, Toshio SATO1993 Volume 47 Issue 5 Pages 291-298
Published: 1993
Released on J-STAGE: February 19, 2013
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Ken TOYOKURA1993 Volume 47 Issue 5 Pages 299-306
Published: 1993
Released on J-STAGE: February 19, 2013
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Mei-Chih LIN, Koji ARAKI, Nobuharu TAKAI1993 Volume 47 Issue 5 Pages 307-311
Published: 1993
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSHomogeneous non-crosslinking anion exchange membranes have been prepared by amination of methyl methacrylate-chloromethylstyrene copolymer with secondary and tertiary alkyl amine, and effects of the reaction conditions and amination reagents have been investigated. The membranes were prepared by cast method, and the results showed that the composition of the cast solution affects membrane permselectivity. These membranes were soluble in a variety of organic solvents and exhibited good dimensional and chemical stability in H2O,1N HCl, 1N NaOH and 2N NaCl even in the absence of additives or reinforcer. The weakly basic anion exchange membrane aminated with diethylamine showed excellent permselectivity, that the transport number in 0.01M/1.5M KCl solution was 0.97 and showed the permselectivity in the pH range of 2-10.View full abstractDownload PDF (3332K) -
Yukako MIZUHARA, Katsutoshi HACHIMURA, Tatsumi ISHIHARA, Tadashi HANO, ...1993 Volume 47 Issue 5 Pages 312-319
Published: 1993
Released on J-STAGE: February 19, 2013
JOURNAL FREE ACCESSIon-exchange properties of LiZr2 (PO4)3, which is one of the good Li ion conductors, were studied and it was found that metal ion substitution for Zr ions brought about marked influence on the ion-exchange properties of LiZr2 (PO4)3.
Li1+xMxZr2-x (PO4)3 (L-MZP)[M: Fe, Cr, Al, Y, 0≤x≤2]compounds were prepared by conventional solid state reactions, heating a stoichiometric mixture of Li2CO3, ZrO (NO3)2·2H2O, H3PO4, and a metal oxide at 1,000°C. The ion-exchange experiments of L-MZP or H-MZP were carried out by a batch method. A known quantity of L-MZP was suspended in 1M HNO3 solution and stirred at room temperature for appropriate period. After the ion-exchange reaction, H-MZP was separated by a membrane filter and dried at 90°C in air over night. Experiments of Li+ recovery were carried out using a 0.15g of H-MZP in buffer solution, containing 5mM of Li+ and/or Na+. The concentration of alkaline metals in the filtrate was determined by atomic adsorption spectro-photometry.
H-CrZP and H-FeZP (A=H and M=Cr or Fe) showed high Li+ selectivity in the Li+ recovery experiments using a NH4Cl-NH4OH buffer solution. In addition, the structures of H-CrZP were extremely stable in an acidic soiution, in the region of 0≤x≤2. H2.5Cr1.5Zr0.5 (PO4)3 showed the highest selectivity to Li+, It collected Li+ efficiently from a buffer solution containing Na+ and Li+; separation factor, αLiNa, reached 2,000. H2.5Cr1.5Zr0.5 (PO4)3 showed maximum Li+ recovery at pH8 which is the same as that of sea water. This material showed extremely high Li+ condense factor, Kd=7,500, in the experiment using Oita sea water. Moreover, 14.5mg of Li were actually collected from a water of Yamaga hot spring.View full abstractDownload PDF (6495K) -
Hiroshi ONISHI1993 Volume 47 Issue 5 Pages 320-330
Published: 1993
Released on J-STAGE: February 19, 2013
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The Use of a Technique in Clinical ExaminationIzuru KAKUTA1993 Volume 47 Issue 5 Pages 331-339
Published: 1993
Released on J-STAGE: February 19, 2013
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Mikio HARIMA1993 Volume 47 Issue 5 Pages 340-344
Published: 1993
Released on J-STAGE: February 19, 2013
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Plastic Deformation of NaCl CrystalsMasayoshi MURAKAMI, Kozo OKA1993 Volume 47 Issue 5 Pages 347-348
Published: 1993
Released on J-STAGE: February 19, 2013
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