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    天然地下水环境四氯乙烯的强化生物降解

    李烨 刘菲 鲁安怀

    李烨, 刘菲, 鲁安怀, 2009. 天然地下水环境四氯乙烯的强化生物降解. 地球科学, 34(5): 870-876.
    引用本文: 李烨, 刘菲, 鲁安怀, 2009. 天然地下水环境四氯乙烯的强化生物降解. 地球科学, 34(5): 870-876.
    LI Ye, LIU Fei, LU An-huai, 2009. Enhanced Biodegradation Potential of Tetrachloroethylene under Natural Groundwater Environment. Earth Science, 34(5): 870-876.
    Citation: LI Ye, LIU Fei, LU An-huai, 2009. Enhanced Biodegradation Potential of Tetrachloroethylene under Natural Groundwater Environment. Earth Science, 34(5): 870-876.

    天然地下水环境四氯乙烯的强化生物降解

    基金项目: 

    国家自然科学基金 40572146

    国家重点基础研究发展“973”计划 2007CB815602

    详细信息
      作者简介:

      李烨(1974—), 女, 博士后, 主要研究方向为水污染控制与修复.E-mail:liye601@126.com

      通讯作者:

      刘菲, E-mail: feiliu@cugb.edu.cn

    • 中图分类号: X131

    Enhanced Biodegradation Potential of Tetrachloroethylene under Natural Groundwater Environment

    • 摘要: 采用批实验方法, 以天然地下水为基础培养液, 利用在实验室条件下培养驯化的微生物, 以醋酸作为共代谢基质, 加入酵母粉提供氮源, 研究了四氯乙烯(PCE) 的降解效果.研究表明, 通过强化影响PCE降解的某些因素, 在20℃的地下水环境中, PCE可以很快转化为三氯乙烯(TCE), 并可以进一步转化为二氯乙烯(DCEs), 但没有检测到DCEs的脱氯产物.PCE的脱氯速率为0.1848d-1, 半衰期为3.75d.亦研究了低温环境下PCE的降解效果.结果表明, 在低温环境下, PCE也可以发生生物降解, 但是脱氯速率相对较慢, 为0.0761d-1, 半衰期为9.11d, 且终产物为TCE.

       

    • 图  1  培养阶段的COD去除率

      Fig.  1.  Removal efficiency of COD during culture

      图  2  驯化过程中的微生物数量变化

      Fig.  2.  Bacterial growth during acclimation

      图  3  实验过程中液相中PCE及其降解产物

      Fig.  3.  Results of degradation products of PCE

      图  4  PCE降解的回归曲线

      Fig.  4.  Regression curve of PCE degradation

      图  5  生成TCE的回归曲线

      Fig.  5.  Regression curve of TCE produced

      图  6  12 ℃环境条件下PCE降解的回归曲线

      Fig.  6.  Regression curve of PCE degradation under 12 ℃ condition

      表  1  地下水成分

      Table  1.   Compositions of groundwater

      表  2  驯化过程的PCE浓度

      Table  2.   PCE concentrations during acclimation

      表  3  液相中PCE的降解碳平衡

      Table  3.   Carbon balance of PCE degradation in liquid phase

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    • 收稿日期:  2008-12-20
    • 刊出日期:  2009-09-25

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