کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6357945 | 1622739 | 2014 | 6 صفحه PDF | دانلود رایگان |
- Bacillus licheniformis strain YX2 is a novel nitrobenzene-degrading bacterium.
- Strain YX2 can endure highly acidic and alkaline conditions and extreme temperatures.
- Strain YX2 efficiently degrades high concentrations of nitrobenzene.
- Strain YX2 was tolerant to high salinity.
- Strain YX2 biodegrades nitrobenzene as a mixed compound.
The Bacillus licheniformis strain YX2, a novel nitrobenzene-degrading halophilic bacterium, was isolated from active sludge obtained from a pesticide factory. Strain YX2 can withstand highly acidic and alkaline conditions and high temperatures. Degradation of nitrobenzene (200 mg Lâ1) by YX2 exceeded 70% after 72 h in lysogeny broth medium (pH 4-9). Under optimal degradation conditions (33 °C, pH 7 in LB medium) YX2 degraded 50, 100, 200, and 600 mg Lâ1 nitrobenzene within 36, 36, 72, and 156 h, respectively. Even in the presence of benzene, phenol or aniline, strain YX2 efficiently degraded nitrobenzene. Furthermore, strain YX2 completely degraded 600 mg Lâ1 nitrobenzene in 7% NaCl (w/w). Thus, our data show that strain YX2 may have promise for removing nitrobenzene from complex wastewaters with high salinity and variable pH.
Journal: Marine Pollution Bulletin - Volume 89, Issues 1â2, 15 December 2014, Pages 384-389