文献类型： 外文期刊

作者： Lin, Hong-yan ¹ ; Yu, Chang-Ping ³ ; Chen, Zu-liang ¹ ;

作者机构： 1.Fujian Normal Univ, Sch Environm Sci & Engn, Fuzhou 350007, Fujian Province, Peoples R China

2.Fujian Acad Agr Sci, Inst Agr Engn, Fuzhou 350003, Fujian Province, Peoples R China

3.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen 361021, Peoples R China

关键词： Biodegradation;TNT;Bacillus mycoides;Kinetic equation;Pathway

期刊名称：ECOLOGICAL ENGINEERING （ 影响因子：4.035； 五年影响因子：4.611 ）

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收录情况： SCI

摘要： A TNT-degrading strain, which was isolated from Fe-reducing bacterial consortia and was identified as Bacillus mycoides based on its 16S rDNA sequence, was first used to degrade TNT under aerobic or anaerobic conditions. The results shows that 93% of the initial TNT was degraded after 16 h under aerobic environment, while 94% of TNT was reduced after 24 h under anaerobic environment. This is attributed to slower microorganism growth under anaerobic conditions and was confirmed in a biokinetic study, where lower degradation rates were obtained under anaerobic condition. Two TNT degradation metabolites, 4-amino-2,6-dinitrotoluene and 6-amino-2,4-dinitrotoluene, were identified by GC-MS and the degradation pathways of TNT by B. mycoides were proposed. Finally, B. mycoides was used to degrade TNT in industrial wastewater, where more than 88% of the TNT was removed, irrespective of the aerobic or anaerobic conditions.