アルキルエーテル類の生分解と生体濃縮

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タイトル別名
  • Biodegradation and Bioconcentration of Alkyl Ethers
  • アルキルエーテルルイ ノ セイブンカイ ト セイタイ ノウシュク

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Tertiary-butyl methyl ether (MTBE) has recently attracted much attention as a high-octane blending stock in the preparation of unleaded premium gasoline.<BR>The biodegradation study of several alkyl ethers having various alkyl groups was carried out by measuring the oxygen uptake rate in the presence of standard activated sludge as a source of microorganisms. Although alkyl ethers with t-butyl groups in their molecules showed very poor biodegradability (Fig.-1), MTBE had no effect on the biodegradability of gasoline blended with it (Fig.-2). MTBE-blended gasoline was found to have excellent biodegradability and causes no environmental pollution.<BR>The bioconcentration factor in fish was determined by the cultivation of Japanese carp in a flowing water system containing alkyl ethers over a period of four weeks. Alkyl ethers used in this bioconcentration experiment were 2- (t-butoxy) ethanol, MTBE, and t-butyl isopropyl ether. The bioconcentration factors of these ethers were 0.6, 1.5, and 5.7, respectively (Fig.-3, Table-1 and Table-2). The concentrated MTBE in the fish was excluded quite rapidly on placing the fish in fresh water (Fig.-3). The bioconcentration factors of water-soluble chemicals such as the alkyl ethers used in this experiment, can be predicted from their partition coefficients in an 1-octanol-water system (Fig.-4).

収録刊行物

  • 油化学

    油化学 33 (2), 111-114, 1984

    公益社団法人 日本油化学会

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