石油污染土壤的本土细菌的柴油降解
Samira Pakdel1, Ali Beheshti Ale Agha2, Rouhallah Sharifi3
1Department of Soil Science, Razi University, Kermanshah, Iran.
概括
本地细菌在受污染的土壤中有效降解石油碳化合物. 甲状腺菌 (Bacillus thuringiensis) 证明了显著的柴油清除,为油田提供了一个有希望的生物修复策略.
科学领域:
- 环境微生物学 环境微生物学
- 生物修复是一种生物修复.
背景情况:
- 石油污染在油田中构成环境风险.
- 本地微生物是有效的土壤生物修复的关键.
研究的目的:
- 从被石油污染的土壤中分离出本地细菌.
- 评估它们的柴油降解能力.
- 识别生物修复的有力菌株.
主要方法:
- 从纳夫特沙赫尔油田收集了土壤样本.
- 在含有柴油的介质上分离和培养细菌.
- 使用气体染色学分析柴油降解.
- 通过16S rRNA基因测序识别了顶部分离物.
主要成果:
- 获得了126个隔离物;48个生长在柴油介质上.
- 在48小时内,柴油清除率从26%到76%不等.
- 突菌 (B48Pet) 的降解率最高 (58.81 mg/L/h).
- 发现了四种分离物:S. gallinarum,P. nitroguajacolicus,A. citreus,B. thuringiensis. 这四种分离物包括:
结论:
- 本地细菌具有显著的石油碳化合物降解潜力.
- 甲杆菌 (Bacillus thuringiensis) 是用于柴油生物修复的高效菌株.
- 这种菌株为清理受污染的土壤提供了一个可持续的策略.
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