用人类作为电子受体的BTEX混合物的无氧生物降解:基质相互作用和微生物群落/人类进化
Zhixing Xiao1, Hongxia Jiang1, Dan Chen1
1College of Urban Construction, Nanjing Tech University, Nanjing 211816, PR China.
Journal of hazardous materials
|December 4, 2025
概括
固态人体素有效地促进,,乙和 (BTEX) 在受污染的地下水中的无氧生物降解. 微生物群落与人类共同进化,通过细胞外电子转移增强污染物去除.
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.
- 地质化学 地质化学
背景情况:
- 固相人体 (HM) 作为无氧生物降解的自然电子介质.
- 生物降解过程中HM调解共存污染物的能力及其与微生物群落的相互作用尚未得到充分理解.
研究的目的:
- 使用HM. 调查,,乙烯和 (BTEX) 的无氧生物降解.
- 在BTEX生物降解过程中探索HM和微生物群落之间的共同进化动态.
主要方法:
- 用HM补充对单个和混合BTEX化合物的定义介质测定.
- 在真正受污染的地下水中分析BTEX降解.
- 使用16S rRNA基因测序进行微生物社区分析.
- 对HM氧化还原部分和微生物细胞外电子转移 (EET) 酶的表征.
主要成果:
- 通过HM补充,单个和混合BTEX化合物的有效无氧生物降解得到了实现.
- 在四级混合物中,BTEX的完全无氧生物降解发生在没有基质抑制的情况下,通过在真实地下水中通过HM减少回收高电子.
- 确定了主要的微生物属Azoarcus和Geothrix,Azoarcus的丰度与HM氧化还原部分相关.
- 在EET酶丰度和HM的CO和Fe (III) 部分之间发现了显著的相关性,这表明微生物与人类的相互作用.
结论:
- 在受污染的环境中,HM是BTEX无氧生物降解的有前途的电子媒介.
- 微生物群落,特别是Azoarcus,通过细胞外电子转移在HM介导的BTEX生物降解中发挥关键作用.
- HM的氧化还原部分可能与微生物EET通路相互作用,促进污染物的降解.
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