埋立地浸出水のオゾン処理における細胞毒性変化の解析と予測 Analysis and Prediction of Changes in Cytotoxicity during Ozonation of Landfill Leachate

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We proposed a method for describing and predicting the changes in the total toxicity based on the concentrations of toxic-controlling chemicals during the ozonation of landfill leachates. In a model experiment, DOC of the sample landfill leachate decreased but its cytotoxicity increased with the increase of ozonation time. Molecular weight fractionation of the most toxic water samle (ozonated for 300 min) showed almost all the toxicity was attributable to the low-molecular-weight (less than 100) fraction. Further chemical analysis revealed that this strong toxicity was mostly explained by the presence of formaldehyde in that fraction. The toxicity reduction by removing this fraction from the whole water sample was predicted using multi-chemical toxicity analysis, and the result was well correlated with the observed toxicity. We attempted to describe these phenomena using a simple numerical model assuming three groups of toxic chemicals; that is, a group consisting of originally-contained chiemicals, a group consisting of moderately-toxic chemicals emerging at a relatively early stage of the ozonation, and a group whose toxicity is explained by formaldehyde. This simple assumption was largely successful in describing the changes in the total toxicity during the ozonation. On the basis of this simple model, toxicity reduction was predicted for pre-aggregation treatment before ozonation and for ozone concentration during the ozonation. The method proposed in this study would be useful in optimizing water treatment processes and their running conditions in terms of the toxicity reduction efficacy.

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 24(5), 293-299, 2001-05-10

    Japan Society on Water Environment

参考文献:  16件中 1-16件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    10008004913
  • 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
    5802387
  • 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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