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BIODEGRADATION OF ETHYLENE DIBROMIDE THROUGH COMETABOLIC MECHANISMS

机译:通过代谢机理生物降解乙二酸乙二酯

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摘要

Three laboratory-scale batch reactor studies were conducted to determine whether soil microbes could degrade ethylene dibromide (EDB) through cometabolic mechanisms. The cometabolic growth substrates investigated were propane, methane, and natural gas. The bacterial consortium was isolated from soils in a mineral salts medium. Reactors were constructed using 160 mL sterile serum bottles with initial EDB concentrations of 200μg/L. Each reactor was amended with propane, methane, or natural gas, then sealed and incubated. Controls were prepared without the addition of the consortium. In all active batch reactors, the ethylene dibromide concentration was reduced by >99% within 11 days of incubation. The laboratory results indicated that EDB could be biodegraded in the presence of propane, methane, and natural gas. Therefore, a technology such as cometabolic air sparging may show promising results for in situ bioremediation when applied in the field.
机译:进行了三个实验室规模的分批反应器研究,以确定土壤微生物是否可以通过代谢机制降解二溴乙烷(EDB)。研究的可代谢生长底物是丙烷,甲烷和天然气。从矿物盐培养基中的土壤中分离出细菌财团。反应器使用160 mL无菌血清瓶构建,初始EDB浓度为200μg/ L。将每个反应器用丙烷,甲烷或天然气修正,然后密封并孵育。在不添加财团的情况下制备了对照。在所有活性间歇反应器中,在孵育11天内,二溴乙烷的浓度降低了> 99%。实验室结果表明,在丙烷,甲烷和天然气存在下,EDB可以被生物降解。因此,当在现场应用时,诸如新陈代谢空气鼓泡之类的技术可能在现场生物修复方面显示出令人鼓舞的结果。

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