JIS COD_<Mn>測定方法の効率化・環境負荷低減技術 Remarkable Improvement of JIS COD_<Mn> by an Effective Colorimetric Method

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著者

    • 石井 誠治 ISHII Seiji
    • 横浜国立大学工学部物質工学科 Laboratory of Safety and Environmental Engineering, Yokohama National University
    • 浦野 絋平 URANO Kohei
    • 横浜国立大学工学部物質工学科 Laboratory of Safety and Environmental Engineering, Yokohama National University

抄録

The COD is a principal water quality index to manage water environment in Japan. However, much labor and large amounts of hazardous reagents are needed to measure by the conventional method in Japan Industrial Standard (JIS). In this study, we developed an improving method of JIS CODMn by colorimetry. This method was much easy procedure and could reduce amounts of the hazardous reagents and energy consumption to one twentieth of the conventional method.Five ml of sample water and 0.50ml of 5.0mmol·l-1 KMnO4 were put into a test tube contained sulfuric acid and silver nitrate. It was heated at 100°C for 30 minutes with block heater. Since it was found that formed Mn2+ from MnO4- was reacted with residual MnO4- to Mn02 in the ratio of 3 : 2, we determined the residual concentration of MnO4- from absorbance at 525nm after filtration of Mn02, and calculated the CODMn.It was confirmed that CODMn values by this developed method for 60 various water samples were equal to the values by the JIS method with r=0.998. The scatter of data and the measurable concentration range of this method were nearly equal to them of the JIS method.

収録刊行物

  • 水環境学会誌 = Journal of Japan Society on Water Environment  

    水環境学会誌 = Journal of Japan Society on Water Environment 22(4), 301-307, 1999-04 

    公益社団法人 日本水環境学会

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各種コード

  • NII論文ID(NAID)
    10004452121
  • NII書誌ID(NCID)
    AN10372439
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09168958
  • NDL 記事登録ID
    4693079
  • NDL 雑誌分類
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL 請求記号
    Z16-1045
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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