Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
Volume 36, Issue 2
Displaying 1-6 of 6 articles from this issue
  • II.Progress of Salt Industry in the 20th Century
    Masayoshi MURAKAMI
    1982 Volume 36 Issue 2 Pages 67-76
    Published: 1982
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
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  • Tsutomu MASUZAWA
    1982 Volume 36 Issue 2 Pages 77-88
    Published: 1982
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
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  • Membrane Conversion Process of the Free Energy of Mixing (Part 2)
    Haruhiko OHYA, Minoru ONODA, Manabu SENOO, Kazutoshi IWAMOTO
    1982 Volume 36 Issue 2 Pages 89-93
    Published: 1982
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
    An investigation was conducted on the energy conversion characteristics of the battery in which the initial concentration of sodium chloride in the electrode compartments and in the middle was 3.5×104 mg/l and 350mg/l, respectively. The power conversion efliciencies which are defined as the ratio of power obtained and the maximum available free energy difference between the initial and the final stages, were 12 to 0.5%. The current conversion efficiencies defined as the ratio of the charge transferred and salt transferred were 10 to 0.5%.
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  • Noboru OGATA
    1982 Volume 36 Issue 2 Pages 94-100
    Published: 1982
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
    Experimental procedures on the evaluation of adsorbent for the extraction of urallium from seawater and an analytical method of the data were studied on a granulated hydrous titanium oxideas a representative example. Adsorption system for the evaluation adopted a multi-layer and fluidized adsorption bed. The experiment for the evaluation was carried out by using a small column, 2cm of diameter, for 10 days. The standard condition was 0.6mm of granule size, 25°C of temperature and 10cm of statistic bed thickness. One of the flow rates was set up at Sv=2.5 min-1 and another one was set up at two times or a half of the flow rate. The measurements were carried out on the bed thickness of statistic and fiuidizing state, granule size, flow rate, temperature, adsorption quantities after 5 and 10 days. An empirical formula on adsorption quantity was derived as follows from these data: C=K1tm1K2Svm2. The diference of density between granule and sea-water was decided from grule size, flow rate and expansion ratio by Max Leva's equation. The adsorption ability was expressed by adsorption quantity per unit volume for 10 days at 50% of recovery (standard uranium uptake) or recovery ratio at Sv=2.5min-1 (stalldard recovery). The former could be better because it was applicable to various adsorbents. These results decided the specification of adsorption process, namely the adsorbent inventory and parameters of the design, by application of analytical method to the previous paper. The economical evaluation indicator was mainly composed of the adsorbent inventory, the construction of adsorption bed and the adsorbent supply. These values were obtained from the above experimental results with some premises of unit prices and some others, namely 0.5 of recovery, 0.6mm of granule size, 1.5 times of expansion ratio, 0.8 of post-process recovery, 500m3/s of pump capacity, 0.0033g/m3 of uranium concentration in sea-water, 17×103\/m3 of unit price of collstruction; 170×103\/m3 of unit price of bed, 0.05y-1 of adsorbent supply, etc. An example of the evaluation was shown on a granulated hydrous titanium oxide.
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  • Studies on the Extraction of Uranium from Sea-Water by the Synthetic Polymer Adsorbent (Part 3)
    Kohji SAKANE, Takahiro HIROTSU, Norio TAKAGI, Shunsaku KATOH, Kazuhiko ...
    1982 Volume 36 Issue 2 Pages 101-107
    Published: 1982
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
    An investigation was made to clarify the technical problems existing in the extraction process of uranium from sea-water with a tetraethyleneglycole dimethacrylate (TEGDM), cross-linked poly (acrylamidoxime) resin, after treatment with 1 M NaOH.
    The rate of uranium adsorption showed an increase as the flow rate of sea-water was increased and the temperature was raised. The rate of uranium adsorption showed 0.1mg/g-Ad·dat SV of 200/h and 25°C. The uranium content exceeded 3.2mg/g-Ad after 180 days without reaching the adsorption capacity.
    More than 90% of uranium was eluted from the adsorbent by 0.5 M H2SO4 for one hour. A cycle test of adsorption-elution on the same adsorbent was carried out, and it was found to be re-usable.
    The consumption of eluant, the removal of Cl-ion at prewashing of the adsorbent before the elution and the recovery of eluate at the expulsion after the elution were also examined.
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  • Tetsuo SUMIDA
    1982 Volume 36 Issue 2 Pages 108-115
    Published: 1982
    Released on J-STAGE: February 19, 2013
    JOURNAL FREE ACCESS
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