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Hirokazu Tanaka, Masatoshi Tsubaki, Yugo Isobe, Osamu Ooishi, Naoyuki ...
Session ID: D2-4
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Ryuji Yanase, Osamu Hirata, Yasushi Matsufuji, Kenji Oyamada, Hiroshi ...
Session ID: D2-5
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Session ID: D2-6
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Osamu Ooishi, Hiroto Tanaka, Yugo Isobe
Session ID: D2-7Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Session ID: D2-8Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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KOHEI TAKATA, SAKIE KATAOKA, MANAMI OKUNO, HIROKAZU TANAKA, KAZUO KAMU ...
Session ID: D2-9Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Ai Nakamura, Yasushi Matsufuji, Ayako Tachifuji, Mitsuhiro Nakamura
Session ID: D2-10Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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[in Japanese], [in Japanese]
Session ID: D3-1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Session ID: D3-2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Session ID: D3-3
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Noritoshi TAMURA, Hiroaki IWAKAWA, Yasuyuki ISHIDA
Session ID: D3-4
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Takashi Mamiya, Yoshiharu Shioyama, Koichi Oniki, Hideki Wakabayashi, ...
Session ID: D3-5
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Landfill operation requires energy mostly for leachate treatment. Especially re-condensation and drying processes of the condensed effluent from Reverse Osmosis Membrane or Electrodialysis consume huge amount of water vapor energy supplied from boilers, which must be minimized by the system innovations. Heat pump technology applied for energy recovery, vapor compression in detail, has been noticed and its functioning for re-condensation and drying processes is discussed. The heat transfer efficiency of condensed effluent vaporization was observed in the labo-scale experiments and the energy conservation potential was verified in the paper.
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WATANABE
Session ID: D3-6
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Session ID: D3-7Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Sukehisa Tatsuichi, Shigenori Iino, Satoshi Mogi, Masahiro Kato
Session ID: D3-8Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Session ID: D3-9Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
FREE ACCESS
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Session ID: D3-10Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
FREE ACCESS
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[in Japanese], [in Japanese], [in Japanese]
Session ID: D3-11Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
FREE ACCESS
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
Session ID: D3-12Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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KAZUTOSHI KATAYAMA, ATSUSHI YAMAWAKI, HIROAKI NIIDUMA, AKIRA ONO
Session ID: D4-1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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ATSUSHI YAMAWAKI, TAKAYUKI SHIMAOKA, KIYOSHI OMINE, TAKESHI KATSUMI, M ...
Session ID: D4-2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Yoichi Doi, Atsushi Yamawaki, Mikio Kawasaki
Session ID: D4-3
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
FREE ACCESS
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Session ID: D4-4
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Seiji Kawai, Takayuki Shimaoka, Shinya Sakaguchi, Atsushi Yamawaki
Session ID: D4-5
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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In order to clear the behavior of soft plastic which included in the landfills on the slope ground, the soft plastic attached with strain gages are buried in the large box. According to the increasing of compression loads, the soft plastic is extended and tensile force is occurred. This tensile force restrains the movement of soil particles which is included in the landfills and restrains the deformation of landfills as a result.
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ATUSHI YAMAWAKI, TAKAYUKI SHIMAOKA, KIYOSHI OMINE, TAKESHI KATSUMI, MI ...
Session ID: D4-6Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Hidetaka Seo, Takayuki Shimaoka, Tomoaki Hachimura, Tetsuya Miyahara, ...
Session ID: D5-1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Hidetaka Seo, Takayuki Shimaoka, Tomoaki Hachimura, Tetsuya Miyahara, ...
Session ID: D5-2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Hidetaka Seo, Takayuki Shimaoka, Tomoaki Hachimura, Kenji Matsumoto, T ...
Session ID: D5-3
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
FREE ACCESS
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[in Japanese], [in Japanese], [in Japanese]
Session ID: D5-4
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Kengo Nakamura, Tetsuo Yasutaka, Toshihiko Miura, Kazuki Ide, Kenzi Ni ...
Session ID: D5-5
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Yutaka Dote, Tomoo Sekito, Yutua Ochiai
Session ID: D6-1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Yasumasa Tojo, Saori Iwamoto, Takayuki Matsuo, Toshihiko Matsuto, In-H ...
Session ID: D6-2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Phase transformation and leaching of cesium from incineration bottom ash were investigated by conducting accelerating weathering experiment. Four kinds of weathering condition were set; namely, blank (under nitrogen gas condition), wetting and drying, freezing and thawing, and exposure to carbon dioxide gas. Leaching of cesium under blank condition didn't change. On the other hand, drastic decrease of leaching of cesium was identified under carbon dioxide exposure. From XRD analysis, formation of calcite was identified. It deemed that newly formed calcite inhibited the leaching of Cs by covering reactive surface of bottom ash. In both wetting-drying and freezing-thawing condition, leaching of Cs increased initially. But it decreased after several weeks then it became lower than blank finally. This decrease of leaching also seems to be caused by formation of calcite.
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Takahiro Iwamoto, Muneharu Fujikawa, Takashi Kawano
Session ID: D6-3
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Session ID: D6-4
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Tsuneki Ichikawa, Kazuo Yamada, Masahiro Oosako
Session ID: D6-5
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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A small amount of nickel hexacyanoferrate(II) was found to prevent the elution of radioactive cesium from incinerator fly ashes that were generated near Fukushima Daiich Reactors. The solution eluted from the wet fly ashes is highly alkaline containing large amounts of calcium, sodium and pottasium chlorides, which makes it difficult to use well-known cesium absorbers such as zeolites and Prussian blue. Nickel hexacyanoferrate(II) acts as a very efficient cesium absorber under such conditiions. The amount of nickel hexacyanoferrate(II) necessary for preventing the elution is as low as a few tens of grams.
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Tsuneki Ichikawa, Kazuo Yamada, Masahiro Oosako
Session ID: D6-6Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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The moisture absorption of calcium chloride in incinerator fly ashes was studied for estimating the effusion time of radioactive cesium from the fly ashes. Incinerator fly ashes generated around Fukushima Daiich Nuclear Reactors contain water-soluble cesium, so that they are planned to be stored for a long time in watertight structures. However, since the fly ashes contain a significant amount of hygroscopic calcium chloride, the radioactive secium is possible to be eluted from the ashes by moisture absorption from the atmosphere no matter how the structures are watertight. Th results are summarised as follows: 1) The rate of moisture absorption is linearly propotional to the root square of time. 2) The effusion takes place when the pores of the ashes are filled with solutions generated by the moisture absorption. 3) The effusion time is proportional to the square of the height of the stored fly ash.
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Akira Kato, Tetsumi Higasayama, Shigeo Kotake, Michihiko Ishida, Shini ...
Session ID: D6-7Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Ryo Kinoshita, yasumasa Tojo, takayuki Matsuo, In-Hee Hwang, Toshihiko ...
Session ID: D6-8Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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The aim of this study is clarifying the leaching behavior of hardly-soluble cesium contained in bottom ash and the factor affecting its leaching behavior. For this purpose, pH dependence test, determination of the Cs content by different particle size and pH dependence test of different particle size fraction were conducted. incineration bottom ashes that was artificially created to contain cesium in high content was used. In pH dependence test, solvents were prepared by using nitric acid to be target pH from 1.9 to 10.8. As the results, leaching amount of hardly-soluble cesium increased together with silicon and aluminum along with decrease of pH. Hardly-soluble cesium combining with aluminosilicate or existing in glassy amorphous phase was deemed to be leached out by the exposure to strong acid. However, the low pH performed in the test never occur in real incineration ashes because pH of ashes is generally high and pH of ash that passed for a long period of time is reported to be almost 8.5. Leaching ratio of cesium is only 2 to 3% at such pH. Content of Cs in each particle size was not different and difference of leaching behavior were not observed either.
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Yosuke Kamata, Fumiki Hosho, Youji Yoshioka, Fumiaki Kambayashi, Seiic ...
Session ID: D6-9Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Hiroshi Kubota, Hiromi Yamada, Kenichi Kimura, Shuntaro Noguchi
Session ID: D6-10Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Waste incineration facilities in Fukushima and other areas have problems with disposal of fly ash. Fly ash cannot currently be landfilled because of radioactivity levels and the solubility of cesium. This work looks at a washing technology that reduces wastewater drastically.Experiments with sprinkling water from above and aeration from beneath were carried out in cylindrical columns(φ104×400,800mmH) filled with fly ash. The effectiveness of sprinkling intensity, aeration levels, filling height(300mm,700mm) and grain size(≤9mm,>9mm) of fly ash were examined.Results obtained confirmed that combining the sprinkling of water and aeration was able to remove radioactive cesium sufficiently whilst producing very little wastewater (L/S=about 0.5) and more fly ash was able to be treated to the same efficiency by increasing the intensity of water sprinkling. It was also suggested that aeration increased the elution efficiency of cesium.
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[in Japanese], [in Japanese], [in Japanese]
Session ID: D6-11Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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HIROSHI NISHIOKA, TATSUO INOUE, NAOKI FUKUMURO, MASAFUMI KOBUNE, JUNIC ...
Session ID: D6-12Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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nobuhiro toriumi, kouji simoda, kentaro miyawaki
Session ID: D6-13Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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[in Japanese], [in Japanese], [in Japanese]
Session ID: D6-14Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
FREE ACCESS
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[in Japanese], [in Japanese], [in Japanese]
Session ID: D6-15Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Takafumi Nakamura, Masaki Takaoka, Kazuyuki Oshita, Kenji Shiota
Session ID: D6-16Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Tsubasa Ito, Kentaro Miyawaki
Session ID: D6-17Poster2
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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Takahiro Uchida, Kazuo Tameda, Sotaro Higuchi, Takaya Kato
Session ID: D6-18Poster1
Published: 2013
Released on J-STAGE: January 21, 2014
CONFERENCE PROCEEDINGS
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