ミミズの忌避性を指標とした処分場浸出水試料の環境影響評価手法

  • 阿部 誠
    (独)国立環境研究所循環型社会・廃棄物研究センター
  • 山田 正人
    (独)国立環境研究所循環型社会・廃棄物研究センター
  • 井上 雄三
    (独)国立環境研究所循環型社会・廃棄物研究センター

書誌事項

タイトル別名
  • Earthworm avoidance test for evaluation of environmental hazard of landfill leachate
  • カガク ブッシツ カンリ センリャク ケンキュウカイ ロンブン ミミズ ノ キヒセイ オ シヒョウ ト シタ ショブンジョウ シンシュツスイ シリョウ ノ カンキョウ エイキョウ ヒョウカ シュホウ

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抄録

To assess environmental hazard of landfill leachate containing toxic substances with or without non-toxic salts, we conducted avoidance test using an earthworm, Eisenia fetida, using in combination with Daphnia magna acute immobilization test. In tests using five phenolic compounds (Bisphenol A, 2, 4-dichlorophenol, o-cresol, p-cresol, p-t-butylphenol) which are possibly present in landfill leachate, earthworm avoided pulp powder spiked with 10mg/L solution of 2, 4-dichlorophenol, p-t-butylphenol, o-cresol and 5mg/L solution of Bisphenol A. The earthworm did not avoid pulp powder spiked with 10mg/L solution of p-cresol. LC50 (mg/L) of D. magna to each chemical was p-t-butylphenol (1.5) > 2, 4-dichlorophenol (2.4) > Bisphenol A (5.0) >p-cresol (7.3) > o-cresol (14.4), respectively. In test using five landfill leachate samples (A, B, C, D and E), earthworm avoided all five leachate samples. D. magna almost died by exposure to A, B, C and D leachate samples but neither mortality nor immobilization were observed by the exposure of E leachate sample. To reduce an effect from high salt concentration in leachate, avoidance test 0.1M NaCl added in control was conducted. Among three samples (A, B and C leachates), earthworm did not avoid A and C leachates but avoided B leachate. These results indicate that earthworm avoidance test have a potential of alternative test method for aquatic ecotoxicity tests to evaluate ecotoxicity of landfill leachate containing salts highly.

収録刊行物

  • 環境科学会誌

    環境科学会誌 20 (6), 503-510, 2007

    社団法人 環境科学会

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