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现代地质 ›› 2007, Vol. 21 ›› Issue (1): 170-174.

• 环境工程 • 上一篇    

四氯乙烯的生物吸附和厌氧生物降解研究

杨琦,席宏波,尚海涛,李惠娣   

  1. 中国地质大学 水资源与环境学院,北京100083
  • 收稿日期:2005-12-20 修回日期:2006-11-15 出版日期:2007-01-20 发布日期:2007-01-20
  • 作者简介:杨琦,男,教授,1966年出生,环境工程专业,主要从事水处理方面的研究工作。 Email:yangq@cugb.edu.cn。
  • 基金资助:

    国家自然科学基金项目(40102027;50578151)

Biosorption and Anaerobic degradation of Tetrachlorothylene

YANG Qi, XI Hong-bo, SHANG Hai-tao, LI Hui-di   

  1. School of Water Resources and Environment, China University of Geosciences,Beijing100083,China
  • Received:2005-12-20 Revised:2006-11-15 Online:2007-01-20 Published:2007-01-20

摘要:

四氯乙烯(PCE)的广泛使用和不合理的处置已经使其成为地下水中普遍存在的有毒有害的有机污染物。PCE在厌氧条件下通过还原脱氯发生生物降解,按照非水溶性生物降解模型,有机物先吸附到厌氧活性污泥中,解吸后再进行生物降解。利用间歇试验进行厌养污泥对PCE的吸附降解实验研究。试验结果表明:厌氧污泥对PCE的吸附在0.5 h达到吸附平衡,在1.0 h达到解吸平衡。对实验结果的回归分析表明:PCE的吸附和解吸均符合Freundlich等温吸附方程。厌氧污泥在微生物的作用下将PCE还原脱氯为TCE和DCEs。

关键词: 地下水, 生物吸附, 四氯乙烯, 厌氧降解

Abstract:

Tetrachlorothylene(PCE) is a toxic organic compound widely used and commonly detected in groundwater. Under anaerobic conditions, PCE is biodegradated through reductive dechlorination. According to non-aqueousphase biodegradation model, PCE was firstly adsorbed into anaerobic sludge, then desorbed and biodegradated. The adsorption of the PCE by anaerobic sludge and the anaerobic biodegradation of PCE were studied. The results of the experiment  indicated that the adsorption of PCE by anaerobic sludge reached equilibrium in half an hour, and desorption equilibrium appeared within one hour. The regression analysis indicated that both adsorption and desorption of PCE conformed to Freundlich equation. PCE was reductively dechlorinated to TCE and DCEs by the microbes in anaerobic sludge.

Key words: groundwater, tetrachlorothylene (PCE), biosorption, anaerobic degradation

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