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 60, Issue 6
Displaying 1-6 of 6 articles from this issue
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  • Prospect of Practical Recovery Technology of Lithium from Seawater
    Kazuharu YOSHIZUKA
    2006 Volume 60 Issue 6 Pages 394-400
    Published: 2006
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.60.394
    JOURNAL FREE ACCESS
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    The demand for lithium has been increasing in recent years, due to its wide application as a raw material for large-capacity rechargeable batteries, light aircraft alloys, and nuclear fusion fuel. Seawater, which contains 230 billion tons of lithium intotal, has thus recently been paid attention as a new resource of this element. However, the recovery of lithium from seawater is quite difficult, since the lithium concentration in seawater is quite dilute, while the co-exiting sodium concentration is quite high. In the present work, novel spinel type manganese dioxide (λ-MnO2) adsorbents have been developed as the adsorbents for lithium recovery from seawater. The granulated adsorbent of ca. 1-2 mm of particle sizes with high surface density can be conducted by using chitin binder and SiO2 binder.
    From the practical experiments with a pilot plant of lithium recovery in IOES, the concentration of lithium ion in elutant solution is 11,000 times compared with that in seawater, in the case of 150 days operation. We elucidate that the chromatographic operation using the developed absorbent could be applied to large scale lithium recovery system from seawater.
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  • Tangential Flow Filtration of Aedes Aegypti Densonucleosis Virus
    David L. GRZENIA, Binbing HAN, S. Ranil WICKRAMASINGHE
    2006 Volume 60 Issue 6 Pages 401-407
    Published: 2006
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.60.401
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    Tangential flow filtration of virus particles may be an important unit operation for the purification of virus particles and virus vectors for gene therapy and viral vaccines. Here passage of Aedes aegypti densonucleosis virus through 100 kDa membranes has been investigated. The Aedes aegypti densonucleosis virus is very small being 18-26 nm in size. Consequently it is will be challenging to remove larger host cell proteins and DNA from the virus particles using membrane filtration.
    Tangential flow ultrafiltration experiments have been conducted using two modes of operation. The high performana tangential flow filtration mode includes recycling of some of the permeate co current to the feed solution. In the single pump mode of operation only a feed pump is used while the permeate outlet is at atmospheric pressure. It was found that the high performance tangential flow mode of operation gives better passage of virus particle. Further the permeate flux is more stable over longer periods of time.
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  • Expanding Technology of Seawater Desalination Membrane
    Masaaki SEKINO, Atsuo KUMANO, Nobuya FUJIWARA
    2006 Volume 60 Issue 6 Pages 408-414
    Published: 2006
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.60.408
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  • Operation of Fukuoka Sea Water Desalination Plant
    Toshio HAMANO
    2006 Volume 60 Issue 6 Pages 415-421
    Published: 2006
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.60.415
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  • Spiral-wound Type Separation Membrane Module for Seawater Desalination
    Hiroshi IWAHORI
    2006 Volume 60 Issue 6 Pages 422-425
    Published: 2006
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.60.422
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  • Decomposition of Jellyfish by Bacterial Enzyme
    Hiroyasu DOI, Mikio TAKEDA, Tatsuzo OKA, Yoshiaki NONOMURA
    2006 Volume 60 Issue 6 Pages 426-433
    Published: 2006
    Released on J-STAGE: February 19, 2013
    DOIhttps://doi.org/10.11457/swsj1965.60.426
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    The decomposition of jellyfish (Aurelia aurita) by means of the bacterial enzyme (prionase) was examined successfully. The prionase was produced extracellularly by Streptomyces strain 99-GP-2D-5, which was isolated from Yatsuhigata tidal flat in Narashino city. Three hundred grams of jellyfish was decomposed completely with 0.2% concentrations of crude enzyme E77 within 30 min at 50°C. The decomposing effect of E77 was confirmed by taking 3 kg of jellyfish in a 300 L siphon-used pilot system under similar conditions, though it took 100 min to decompose the jellyfish perfectly. The repetitive use of 0.2% E77 solution without a new addition of E77 was also tested. The test shows that it decomposes 100 g of newly added jellyfish at least 5 times at 50°C. The jellyfish-decomposed solution diluted by 30mg/L COD value, an acute toxicity was not observed using Oryzias latipes.
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