Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
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Volume 34, Issue 3
Displaying 1-7 of 7 articles from this issue
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    1980 Volume 34 Issue 3 Pages 145-149
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.34.145
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1980 Volume 34 Issue 3 Pages 157-165
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.34.157
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1980 Volume 34 Issue 3 Pages 166-182
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.34.166
    JOURNAL FREE ACCESS
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  • On the Double Salt 2CaCl2·MgCl2·6H2O
    Studies of Natural Gas Brine (Part10)
    Kyunosuke MAJIMA, Masatosi YAMASHIRO, Shumpei OKA
    1980 Volume 34 Issue 3 Pages 183-188
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.34.183
    JOURNAL FREE ACCESS
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    The double salt 2CaCl2·MgCl2·6H2O was synthesized by precipitating in the equilibrium solution of the system MgCl2-CaCl2-H2O at 110°C. The properties of this salt were studied by means of thermogravimetric analysis, differential thermal analysis, the powder X-ray diffraction, chemical analysis and microscopic photographs. The double salt 2CaCl2·MgCl2·6H2O was found in deliques. cent white fine crystal and to have many diffraction lines like Tachhydrite.
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  • A Study of Combined Separation Process in Uranium of Artificial Sea Water
    Recovery Process of Uranium from Sea Water by Ion Flotation with Powdered Titanic Acid (Part1)
    Tadashi SHIROTSUKA, Eiji INOUE
    1980 Volume 34 Issue 3 Pages 189-195
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.34.189
    JOURNAL FREE ACCESS
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    For the purpose of recovering uranium from sea water, the study has been made on the adsorption of uranium in artificial sea water with powdered titanic acid. Foam separation process has been proposed which is composed of adsorption with powdered titanic acid and ion flotation. In the experiment of adsorption, the apparent adsorption rate coefficient of combined process proved to be larger than that of continuously stirring system. The relation between uranium adsorbed capacity and concentration of uranium in the solution was arranged by Freundlich's equation. Recovery of uranium from sea water was found to be about3,000μg-U/g-Ad in 15 days stirring. Advisable condition of combined separation process is shown as follows:
    1. Surface active agent...DBS,
    2. Concentration of DBS...1.0mg/l,
    3. Gas velocity...0.25cm/sec.
    Separation of powdered titanic acid from bulk liquid was recovered 90% by flotation with DBS concentration of 150mg/l.
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  • Determination of Traces of Cobalt, Copper, Manganese, Nickel and Lead in Solar Salt by Atomic Absorption Spectrometry Combined with Extraction
    Yoshifumi AKAMA, Toshio NAKAI, Fumikazu KAWAMURA
    1980 Volume 34 Issue 3 Pages 196-199
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.34.196
    JOURNAL FREE ACCESS
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    An atomic absorption spectrometric method combined with4-benzoyl-3-methyl-1-phenyl-5-pyrazolone (BMPP)-MIBK extraction was studied for the determination of five elements (Co, Cu, Mn, Ni and Pb) in solar salt samples.The proposed procedure was as follows: About 60 g of the sample was dissolved in distilled water, the pH was adjusted to 8 with NH4OH-NH4Cl buffer and then the volume of the solution was set to 300 ml with distilled water. Next 10 ml of 0.4w/v% BMPPMIBK solution was added and the mixture was shaken vigorously for 5 minutes and then the separated organic layer was analyzed with standard addition method by atomic absorption spectrometry.
    The proposed method could be sucessfully applied for the determination of trace elements in solar salt sample.
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  • The Spectrophotometric Determination of Iron in Solar Salt Samples
    Yoshifumi AKAMA, Kenji SATO, Toshio NAKAI, Fumikazu KAWAMURA
    1980 Volume 34 Issue 3 Pages 200-202
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.34.200
    JOURNAL FREE ACCESS
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    A method of solvent extraction spectrophotometric determination of trace amounts of iron with 4-capryl-3-methyl-1-phenyl-5-pyrazolone (CMPP) was investigated.
    CMPP forms a red stable complex with iron (III) and the reaction product can be extracted in organic solvents. Therefore the reaction is used for the determination of trace iron in solar salt samples.
    The proposed procedure is as follows: Sample of 50 g is dissolved in 170 ml of distilled water and adjusted the pH to 3.5 by adding buffer solution of acetic acid-sodium acetate. 6ml of 1-butanol containing 0.3% (w/v) CMPP is added to the solution and the mixture is shaken for 15 minutes. Organic layers is separated from the aqueous phase. After the organic layer is centrifuged for 5 minutes, its absorbance is measured against the 0.3% (w/v) CMPP solution at 450 nm.
    It is found out that the solar salt samples used contain 0.2-0.6 ppm iron.
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