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 33, Issue 5
Displaying 1-6 of 6 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1980 Volume 33 Issue 5 Pages 251-260
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.33.251
    JOURNAL FREE ACCESS
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  • Adsorption of n-butane Dissolved in Water and Aqueous Solution of Sodium Chloride on Activated Carbon
    Studies on Desalting of Sea Water by Freezing Method (Report 11)
    Masaru OOWA, Shigetake KAWASAKI
    1980 Volume 33 Issue 5 Pages 261-268
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.33.261
    JOURNAL FREE ACCESS
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    In the desalination process by butane freezing method, the recovery and remove of butanedissolved from the fresh water and waste brine are required for the economy of the process andthe conservation of environment. For the purpose of removing the butane dissolved by adsorpingon activated carbon, the adsorption experiments of n-butane dissolved in water and the aqueoussolution of sodium chloride at 20°C were carried out using six kinds of the commercial activatedcarbon. And the adsorption of benzoic acid in the aqueous solution was investigated similarly tocompare with that of n-butane.
    The adsorption of n-butane decreased rapidly as the concentration decrease, and these isothermal data were given on a straight line with a steep gradient. Each activated carbon gave the individualadsorption isothermal line of n-butane, and the values of the constants, 1/n and k in the Freundlichequation on these lines were in the range of about 1.8 to 2.8 and about 13 mmol/g to 250 mmol/g, respectively. In the aqueous solution of sodium chloride, the adsorption of n-butane showed atendency to decrease furthermore.
    From these experimental results, it was found that the removing the butane dissolved from thefresh water and waste brine by the only adsorption on activated carbon was not an efficient method in the desalination process.
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  • Decomposition of Ammonia in Make-up Seawater of Distillation Process by Chlorine Treatment
    Totaro GOTO, Toshikatsu HAKUTA, Ichiro HAYANO, Satoshi TOMISAWA, Kunio ...
    1980 Volume 33 Issue 5 Pages 269-273
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.33.269
    JOURNAL FREE ACCESS
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    A part of volatile materials in make-up seawater has possibility of transferring into fresh waterin a distillation process. Ammonia is one of such pollutants. The present paper is concernedwith both fundamental study in laboratory and field tests with a test plant on decomposition ofammonia by chlorine treatment of make-up seawater in a multi-stage flash plant.
    In the fundamental study, effects of reaction temperature, chlorine amount added and pH ondecomposition rate of ammonia were measured. It was found that increases in chlorine added andhigher temperatures promoted ammonia decomposition. It was also observed that the presence ofbromide ion accelerated the decomposition. The higher the pH value in the sample was, thefaster ammonia decomposed. It was suggested from the results that one should add chlorinebefore acid injection for a pH-controlled desalination plant.
    In the field tests with a 100,000m3/day test module, 0.4 or 0.7ppm ammonium ion was addedto the intake seawater, and decomposed by 3ppm chlorine.The experiments showed that 3 ppm chlorine was sufficient for 0.4 ppm ammonium ion, but not for 0.7 ppm.
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  • Effect of Unevenness of Brine Flows in the Huge Tube Bundle on Performances of the Test Module Plant of 100,000m3/d Multistage Flash Evaporator
    Yoshihiro NAKASHIMA, Noriaki NAKAZAWA, Shigeki TOYAMA
    1980 Volume 33 Issue 5 Pages 274-280
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.33.274
    JOURNAL FREE ACCESS
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    Unevenness of brine flows in the tube bundle of a multistage flash evaporation plant was measuredin regard to temperature and velocity. The plant was the test module of 100,000m3/d long tubedesigned high flow rate type multistage flash evaporator which was constructed and operated asthe national project on sea water desalination. The velocity and the temperature at the outlet ofsome of each heat transfer tube were measured by a pitot tube of 6mm O.D. and a sheathed CC thermo couple of 3.2mm O.D.
    Relative standard deviation of the velocity and the temperature was respectively 0.125 and 0.11. The unevenness of data indicated no specific tendency due to the location of the tube at thebundle of 1.6m in diameter, although partialy depending on deviation in the measurement. Those data were discussed in connection with performances of tube bundle such as the over allheat transfer coefficient and the amount of exchanged heat, and it was found that these unevenness gave little affect toward the performance.
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  • Reviews on Salt Industry with Ion-Exchange Membrane Method (Part 2)
    Masou NAGAMI
    1980 Volume 33 Issue 5 Pages 281-286
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.33.281
    JOURNAL FREE ACCESS
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  • Early Diagenesis in Marine Sediment and Manganese Nodule
    Shizuo TSUNOGAI
    1980 Volume 33 Issue 5 Pages 287-299
    Published: 1980
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.33.287
    JOURNAL FREE ACCESS
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