| 四氯乙烯的生物吸附和厌氧生物降解研究 |
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| 引用本文： | 杨琦,席宏波,尚海涛,李惠娣.四氯乙烯的生物吸附和厌氧生物降解研究[J].现代地质,2007,21(1):170-174. |
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| 作者姓名： | 杨琦 席宏波 尚海涛 李惠娣 |
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| 作者单位： | 中国地质大学 水资源与环境学院，北京100083 |
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| 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。
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| 关 键 词： | 地下水 生物吸附 四氯乙烯 厌氧降解 |
| 文章编号： | 1000-8527(2007)01-0170-05 |
| 收稿时间： | 12 20 2005 12:00AM |
| 修稿时间： | 11 15 2006 12:00AM |
Biosorption and Anaerobic degradation of Tetrachlorothylene |
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| YANG Qi,XI Hong-bo,SHANG Hai-tao,LI Hui-di.Biosorption and Anaerobic degradation of Tetrachlorothylene[J].Geoscience——Journal of Graduate School,China University of Geosciences,2007,21(1):170-174. |
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| Authors: | YANG Qi XI Hong-bo SHANG Hai-tao LI Hui-di |
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| Institution: | School of Water Resources and Environment, China University of Geosciences,Beijing100083,China |
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| 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. |
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| Keywords: | groundwater tetrachlorothylene(PCE) biosorption anaerobic degradation |
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