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 37, Issue 1
Displaying 1-6 of 6 articles from this issue
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  • Development of Evaporators and Technology in the Salt Industry
    Chapter 3
    Masayoshi MURAKAMI
    1983 Volume 37 Issue 1 Pages 3-17
    Published: 1983
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.37.3
    JOURNAL FREE ACCESS
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  • Recent Progress in Ion Exchange Membrane
    Shigeru ITOI, Yoshinobu TANAKA
    1983 Volume 37 Issue 1 Pages 18-26
    Published: 1983
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.37.18
    JOURNAL FREE ACCESS
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  • Coprecipitation-enrichment and Atomic Absorption Spectrophotometric Determination of Cu (II) in Sea Water
    Takashi MATSUDA, Yoshimichi MAEDA, Takatsugu AZUMI
    1983 Volume 37 Issue 1 Pages 27-32
    Published: 1983
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.37.27
    JOURNAL FREE ACCESS
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    A simple micro-determination of Cu (II) ions in sea water was studied by atomic absorption spectrophotometry (AAS). Cu (II) ions were preconcentrated by a precipitation method using Fe (II) ions and sodium diethyldithiocarbamate (DDTC). After collecting the precipitate containing Cu (II) on a membrane filter paper, it was dissolved with 1 N-HNO3, followed by evaporation to dryness. The sample solution used for AAS was obtained by redissolving the residue with 0.1 N-HNO3. It was possible to determine Cu (II) ions up to the concentration of 1μg/l without any copresence effects of the salts (NaCl, MgCl2, Na2SO4 and CaCl2), This method was satisfactorily applied to the determination of Cu (II) ions in sea water.
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  • Adsorption and Desorption Process on Extraction of Uranium from Seawater
    Noboru OGATA
    1983 Volume 37 Issue 1 Pages 33-37
    Published: 1983
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.37.33
    JOURNAL FREE ACCESS
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    The investigation in MMAJ and MITI in Japan is partially introduced. Experimental results are reported on adsorption characteristics of a granulated hydrous titanium oxide selected as a good adsorbent and post adsorption process.
    The equilibrium of adsorption has a linear relationship when plotted on a logarithmic scale. But the complete equilibrium values could not be obtained. Many kinds of adsorbents were tested, but hydrous titanium oxide is the best because of high adsorption rate, non-toxicity, chemical stability and mechanical strength. The adsorption rate is given by the formula C=ktmwhere t is in days. And this value is influenced by flow-rate, granule size and temperature.
    At present, a multi-bed system with pump is preferred for adsorption. A carbonate solution for eluting uranium from adsorbent has been studied, and the concentration of uranium in the eluate is kept above 10 ppm. During pre-washing and post-washing, 1.2 bed volume of water can remove 90% of salt. Calcium carbonate is accumulated during sorption and elution cycles, but its influence in the sorbent is relatively small. Electric dialysis with ion exchange membrane has been proposed for the recovery of carbonate, and uranium loss is negligible while more than 95% of the carbonate is recovered.
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  • Comparison of MF-value and Turbidity
    Yasushi NIINO, Noriko SHIMIZU, Noboru OGATA, Nagakazu MIYAUCHI
    1983 Volume 37 Issue 1 Pages 38-41
    Published: 1983
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.37.38
    JOURNAL FREE ACCESS
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    Indexes were studied on turbidity measured by light scattering and MF-value indicated by filtration velocity. The experiments were run in the cases of some suspended solutions, natural seawater, cultured seawater and seawater mixed with adherent matter on ion-exchange membrane.
    The turbidity values showed a little effect on the quality of suspended matter. The sensitivity of MF-value showed high and equivalent to turbidity on compressible suspended matter such as ferric hydroxide or biological matter but low on incompressible suspended matter such as sand or clay. The characteristics of filter of each maker were very different from each other, and it was found necessary to select a suitable kind of membrane filter. Seawater mixed with adherent matter on ion-exchange membrane showed a similar filtration characteristics as ferric hydroxide, and therefore the adherent matter was estimated a compressible one. As the result of the above experiments, MF-value was considered suitable for the control of raw water in making salt by ionexchange membrane.
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  • Mineral Facts and Problems “Salt” 1980
    Dennis S. KOSTICK, Hirohisa YAMANAKA
    1983 Volume 37 Issue 1 Pages 42-56
    Published: 1983
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.37.42
    JOURNAL FREE ACCESS
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    [in Japanese]
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