生物炭在 anammox 联盟中减轻Fe (III) 压力的多维机制
Luomiao Ji1, Xiaonong Zhang1, Xingxing Zhang2
1National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, PR China.
Environmental research
|August 30, 2025
概括
生物炭通过吸附,减少和微生物保护在无氧氧化 (anammox) 系统中减轻高铁的毒性. 这提高了除效率,并保护了关键细菌,为废水处理提供了解决方案.
科学领域:
- 环境微生物学
- 环境化学
- 生物技术
背景情况:
- 高度的铁 (III) 抑制了无氧氧化 (anammox) 过程,限制了它们在废水处理中的应用.
- 开发有效的减轻铁毒性的策略对于优化除技术至关重要.
研究的目的:
- 研究生物炭在anammox系统中减轻Fe (III) 压力的机制.
- 在高Fe (III) 条件下评估生物炭对去除效率,微生物群落和铁物种化的影响.
主要方法:
- 使用和不使用生物炭建立了具有不同Fe (III) 度 (0-100 mg/L) 的批量反应系统.
- 分析了去除效率,细胞外聚合物 (EPS) 特性,矿物阶段分析和微生物群体结构.
- 研究了生物炭上的氧活性功能组及其在铁转化中的作用.
主要成果:
- 生物炭显著减轻了Fe (III) 的毒性,保持了高去除效率 (84.7±1.40%在50mg/LFe (III)).
- 生物炭促进了EPS的分泌,形成了一种保护屏障,并促进了有毒Fe (III) 转化为不那么有毒的Fe (II) 物种 (Fe3O4/FeO (OH)).
- 生物炭选择性地保护了Candidatus Brocadia和富含酸盐的Fe (II) 氧化细菌,增强了的转化.
结论:
- 通过物理吸附,化学减少和生物保护,生物炭有效地提高了对Fe (III) 的耐受性.
- 这项研究提供了生物炭在调节EPS,铁形态和微生物反应中的作用,这对于处理重金属废水至关重要.
- 这些发现支持生物炭在具有挑战性的工业废水场景中优化低碳除的应用.
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