活性炭による希薄水溶液からの水銀の捕集

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書誌事項

タイトル別名
  • Collection of mercury from dilute aqueous solutions with activated carbon
  • カッセイタン ニヨル キハク スイヨウエキ カラ ノ スイギン ノ ホシュウ

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抄録

The main purpose of the present work is to concentrate traces of mercury from waste water or effluent. Mercury (1 to 3 ng per 100 ml) in aqueous solutions containing preserving reagents was collected with 100 mg of activated carbon (occasional stirring by hand for one hour). Mercury was then determined directly by combustion-gold trap-flameless atomic absorption spectrometry. Average recoveries of mercury(II) and methylmercury from 0.1 M nitric acid-10 ppm L-cysteine solution were 98% (n=9) and 97% (n=6), respectively, with relative standard deviations of 6.4% and 6.3%, respectively. Iodide interfered seriously with the collection-determination of mercury(II). Recoveries of mercury(II) from 0.8 M nitric acid-0.05% potassium dichromate solution and from 0.2 M sulfuric acid-0.05% potassium dichromate solution were low, but they were greatly improved by neutralizing the solutions with 5 M sodium hydroxide. Thus average recoveries and relative standard deviations were 100% (n=6) and 3.5%, respectively, for nitric acid-dichromate solution and 98% (n=6) and 1.9%, respectively, for sulfuric acid-dichromate solution. Recoveries of methylmercury after neutralizing these acid solutions were about 90%.

収録刊行物

  • 分析化学

    分析化学 28 (8), 451-454, 1979

    公益社団法人 日本分析化学会

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