Journal of Environmental Conservation Engineering
Online ISSN : 1882-8590
Print ISSN : 0388-9459
ISSN-L : 0388-9459
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Volume 17, Issue 4
Displaying 1-11 of 11 articles from this issue
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  • [title in Japanese]
    Michiharu KOBAYASHI
    1988 Volume 17 Issue 4 Pages 217-221
    Published: April 30, 1988
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.17.217
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Norimitsu MORIKAWA
    1988 Volume 17 Issue 4 Pages 222-226
    Published: April 30, 1988
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.17.222
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Fumihiko JIKU, Kosuke NUMANO
    1988 Volume 17 Issue 4 Pages 227-231
    Published: April 30, 1988
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.17.227
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Yasuo SHIMAZU
    1988 Volume 17 Issue 4 Pages 232-235
    Published: April 30, 1988
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.17.232
    JOURNAL FREE ACCESS
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  • Measurement of Nitrogen Oxides in Ambient Air and in Stack Gas
    Motonori TAMAKI, Takatoshi HIRAKI
    1988 Volume 17 Issue 4 Pages 236-244
    Published: April 30, 1988
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.17.236
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    Isamu MORI
    1988 Volume 17 Issue 4 Pages 245-249
    Published: April 30, 1988
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.17.245
    JOURNAL FREE ACCESS
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  • Repression of bulking and optimal reservation condition of immobilized microorganisms
    Osamu ARIGA, Yumiko KAWAHARA, Kensei NAKAJIMA, Akio FUJII, Yoshiki SAN ...
    1988 Volume 17 Issue 4 Pages 250-256
    Published: April 30, 1988
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.17.250
    JOURNAL FREE ACCESS
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    For repression of bulking, an attempt was tried by addition of immobilized microorganisms to a mixed liquor. This resulted in the temporary increasing of MLSS and as well as the rapid decreasing of TOC. When some of immobilized activated sludge was added to the aeration tank containing bulking sludge, a remarkable decreasing of the S V I was obserded comparing to the reference, under a batch system.
    Optimal reservation condition of immoblized microorganisms will be required to for unexpected bulking trouble. Under optimal reservation condition, i.e. in tap water lower than 10 °C, the activity higher than 70% of the initial activity was kept throughout six months.
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  • Adsorption of Methylmercury Chloride on Sulfonated Peat
    Hiroshi OKA, Minoru FUNAKI
    1988 Volume 17 Issue 4 Pages 257-261
    Published: April 30, 1988
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.17.257
    JOURNAL FREE ACCESS
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    Sulfonated peat prepared by the reaction of peat with sulfuric acid-boron trifluoride adduct at 100°C for 90 min, was used as an adsorbent for methylmercury chloride in aqueous solution. The sulfur content of the sulfonated peat was about 4 %.
    After shaking 100ml of 1 ppm aqueous methylmercury solution (pH 5) with 100mg of sulfonated peat for 24 hr at room temperature, the concentration of methylmercury was decreased to 13 ppb, which was less than 1/4 of the value obtained by use of the activated carbon.
    It was found that sulfonated peat had a good adsorptive ability for methylmercury chloride from aqueous solution over a wide range of pH, and the presence of 100 times as much foreign metal ions as methylmercury such as calcium, cadmium (II), zinc and iron (III) did not interfere with the adsorption of methylmercury.
    Sulfonated peat adsorbed methylmercury can be regenerated by treatment with 4 N hydrochloric acid.
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  • Fading Effects of Nitrogen Dioxide on Antraquinone Dyes
    Kunio YOSHIZUMI
    1988 Volume 17 Issue 4 Pages 262-265
    Published: April 30, 1988
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.17.262
    JOURNAL FREE ACCESS
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    Three kinds of dyes were selected among the anthraquinone drivatives with different amino groups to investigate their spectroscopic characteristics and the effects of nitrogen dioxide on their fading. These dyes dissolved in tetrachloromethane were exposed to nitrogen dioxide standard gases by using a midget impinger. UV-VIS spectra were measured in appropriate intervals during the nitrogen dioxide exposure. The fading of these dyes by nitrogen dioxide was found to be rapid in the following order:
    1, 4-diaminoanthraquinone > 1-aminoanthraquinone > 1-methylaminoantraquinone.
    The relatively high reactivity of 1, 4 -diaminoanthraquinone is considered to be derived from two amino substitutent groups. However, it is not easy to understand the fact that 1-aminoan-thraquinone is more reactive to nitrogen dioxide than 1-methylaminoantraquinone from the standpoint of the basicity strength of amino groups.
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  • [title in Japanese]
    Koichi IMAI
    1988 Volume 17 Issue 4 Pages 266-268
    Published: April 30, 1988
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.17.266
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1988 Volume 17 Issue 4 Pages 269
    Published: April 30, 1988
    Released on J-STAGE: March 18, 2010
    DOIhttps://doi.org/10.5956/jriet.17.269
    JOURNAL FREE ACCESS
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