在中国南部的土中减少Feammox和铁的异步特性
Ding Ma1, Jin Wang1, Jintao Fang2
1School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China; Anhui Engineering Research Center of Industrial Wastewater Treatment and Resource Recovery, Hefei University of Technology, Hefei, Anhui 230009, China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, Anhui 230009, China.
Environmental research
|April 6, 2024
概括
无氧氨氧化加上铁还原 (Feammox) 是一个关键的损失途径. 这项研究表明,减少铁的细菌可能不会直接驱动Feammox,因此需要重新评估它们的作用.
科学领域:
- 环境微生物学环境微生物学
- 生物地质化学循环是什么
背景情况:
- 无氧氨氧化与铁减少 (Feammox) 结合,是生态系统,特别是土中的重要损失途径.
- 铁结合的精确机制以及降铁细菌 (IRB) 在Feammox中的作用尚不清楚.
研究的目的:
- 在无氧条件下研究Feammox和铁还原动力学.
- 在长期化期间探索微生物社区进化.
- 阐明IRB在Feammox过程中的作用.
主要方法:
- 使用15N同位素标记与分子生物学技术相结合.
- 进行了长期无氧化试验.
- 量化了Feammox和铁的减少率,并分析了微生物群落的组成.
主要成果:
- 平均Feammox和铁的减少率分别为0.25 ± 0.04 μg N g-1 d-1和40.58 ± 3.28 μg Fe g-1 d-1.
- 高氧化铁含量提高了Feammox的含量,但降低了Feammox-N2.2的比例.
- 微生物群落进化,其中RBG-13-54-9,Brevundimonas和Pelomonas扮演着重要的角色.
- 随着时间的推移,观察到Feammox和铁减少之间的异步变化.
结论:
- 减少铁的细菌可能不是Feammox的主要驱动因素.
- 在Feammox过程中IRB的作用需要重新评估.
- 了解这些微生物过程对于管理生态系统中损失至关重要.
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