反硝化条件下微生物降解地下水中的苯和甲苯

利用实验室含水层物质微环境实验，对地下水中常见有机污染物苯和甲苯在厌氧反硝化条件下的微生物降解进行了研究．通过10种方案实验结果的分析对比表明，在强化反硝化条件下，微生物利用NO₃^-作为电子受体降解苯和甲苯；降解苯和甲苯的反硝化细菌来自于含水层物质；微生物所需要的宏量营养由苯、甲苯和硝酸盐提供，而微生物所需要的其他痕量元素来自于含水层物质；环境的酸碱条件对微生物降解具有重要影响pH值过高（pH＞10）或过低（pH＜4）均抑制微生物降解过程的进行这些结论对研究地下水有机污染及其生物治理具有一定的理论和实际指导意义

Microbial degradation of benzene and toluene in groundwater under enhanced denitrifying condition

The biodegradation of benzene and toluene was studied by aquifer material microcosm experiment inlaboratory under enhanced denitrifying conditions. Based on the analyses and contrast of the experiment results, thefollowing important conclusions were obtained. Microorganisms can utilize nitrate as electron acceptor to degradebenzene and toluene under enhanced denitrifying conditions, the denitrifers come from the aquifer material; themacro-nutrient microorganisms needed is provided by the benzene, toluene and nitrate and the trace elements comefrom the aquifer material; environmental conditions have great effect on biodegradation of benzene and toluene andthe pH inhibits biodegradation strongly when it is too high (pH>10) or too low (pH<4).