| 饱和带有机污染物的厌氧反硝化微生物降解 |
| 摘要点击 1173 全文点击 1405 投稿时间：1998-03-12 |
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| 中文关键词 生物降解 降解动力学 厌氧反硝化 有机物污染 饱和带 地下水 芳香烃 卤代烃 |
| 英文关键词 biodegradation biodegradation rate equation anaerobic denitrification organic contaminants groundwater zones aromatic hydrocarbon halogenated hydrocarbon |
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| 中文摘要 |
| 以卤代烃和芳香烃为代表,通过室内实验模拟饱和带厌氧反硝化环境,对地下饱和带中有机污染物的厌氧反硝化可生物降解性、降解机理、降解动力学方程等进行了研究。实验结果表明,芳香烃较卤代烃易被微生物降解,在有低浓度的葡萄糖存在时有机物的最大生物降解速率C6H6:Lmax=17mg/(m2·d),C7H8:Lmax=46mg/(m2·d),CCl4:Lmax=7mg/(m2·d),CHCl3:Lmax=6mg/(m2·d),均高于无葡萄糖的试验组。同时利用推导的生物降解速率方程对结果进行了生物降解探讨。 |
| 英文摘要 |
| A series of laboratory experiments were conducted to study anaerobic biodegradation of organic contaminants under denitrifying conditions in aquifer columns simulating saturated flow typical for a groundwater infiltration system. This study focused on the anaerobic biodegradation mechanism and biodegradation rates equation. The experiment's data suggested than both aromatic hydrocarbons and halogenated hydrocarbons were degraded under anaerobic denitrifying conditions, but aromatic hydrocarbons were degraded more rapidly than halogenated hydrocarbons. The biodegradation rates equation was established and solved using Monod kinetics. Based on the solved results of equation, the maximum biodegradation rates (Lmax) of all hydrocarbons under anaerobic denitrifying conditions with low concentration of C6H12O6 are as following: C6H6:Lmax=17mg/(m2·d),C7H8:Lmax=46mg/(m2·d),CCl4:Lmax=7mg/(m2·d),CHCl3:Lmax=6mg/(m2·d),which were higher than those without C6H12O6. |
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