通过厌氧细菌减少化二氧化的脱化
Michael Bunge1, Lorenz Adrian, Angelika Kraus
1Institut für Mikrobiologie, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle, Germany. m.bunge@mikrobiologie.uni-halle.de
Nature
|January 24, 2003
概括
微生物还原性脱为有毒二氧化 (PCDD和PCDF) 提供了一个有前途的排毒方法. 这项研究确定了能够脱这些有害环境污染物的Dehalococcoides物种.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 毒理学 毒理学 毒理学
背景情况:
- 聚二二二氧化物和二酸 (PCDD/PCDF) 是高度有毒和致癌的环境污染物.
- 微生物还原性脱是这些持久性有机污染物的关键排毒机制.
- 识别导致沉积物中二氧化脱的特定微生物仍然是一个挑战.
研究的目的:
- 识别能够在污染的淡水沉积物中减少PCDD和PCDF脱的微生物.
- 为了证明一种已知的脱呼吸细菌的能力,Dehalococcoides sp. 菌株CBDB1,用于脱二氧化物相关物质.
主要方法:
- 从二氧化污染的淡水沉积物中建立了丰富培养物.
- 使用分子技术证实了Dehalococcoides物种的存在.
- 德哈洛科科伊德斯 (Dehalococcoides) 种类 (sp. 菌株CBDB1被测试了其减少脱特定的二氧化物原体的能力,包括1,2,3,7,8-五二氧化物-p-二氧化物 (PeCDD).
主要成果:
- 在四个独立的二氧化碳脱丰富培养物中确定了一种Dehalococcoides物种.
- 德哈洛科科伊德斯 (Dehalococcoides) 种类 (sp. 菌株CBDB1表现出具有减少性脱选择PCDD原体的能力.
- 通过Dehalococcoides sp.成功地脱了PeCDD. 观察到CBDB1菌株,表明其在降解环境重要二氧化物中的潜在作用.
结论:
- 脱氧菌种存在于来自受污染沉积物的二氧化碳脱微生物群落中.
- 德哈洛科科伊德斯 (Dehalococcoides) 种类 (sp. 菌株CBDB1能够减少环境相关的二氧化的脱.
- 这一发现支持了微生物脱呼吸对二氧化污染场地的生物修复的潜力.
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