通过在基于H2的膜生物膜反应器中的并发脱化来缓解染色体毒性
Min Long1, Chen-Wei Zheng2, Chen Zhou3
1State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Biodesign Swette Center for Environmental Biotechnology, Arizona State University, USA.
Journal of hazardous materials
|April 2, 2025
概括
这项研究表明,基于的膜生物膜反应器 (MBfR) 中的自脱生物膜可以通过生物转化有效地去除高度六价 (Cr(VI),在四个月内实现99%的减少.
科学领域:
- 环境科学 环境科学
- 环境微生物学 环境微生物学
- 生物技术是生物技术.
背景情况:
- 工业废水中高度的六价 (Cr(VI)) 存在重大环境和健康风险.
- 生物转化是减少Cr6毒性的有望方法,但现有的研究主要针对低Cr6度.
- 生物膜在像基于H2的膜生物膜反应堆 (MBfR) 这样的反应堆中处理高Cr6水平的能力需要进一步研究.
研究的目的:
- 在MBfR中使用生物膜评估高度Cr(VI) 的生物吸收和生物转化.
- 评估影响MBfR系统中Cr (VI) 清除的长期有效性和操作参数.
- 阐明微生物机制和脱在Cr (VI) 生物还原中的作用.
主要方法:
- 使用基于的膜生物膜反应器 (MBfR) 来处理含CrVI度较高的废水.
- 研究了增加 (H2) 压力对Cr (VI) 和酸盐 (NO3-) 除去效率的影响.
- 采用了元基因组分析来识别微生物群落和参与Cr (VI) 减少的功能基因.
主要成果:
- 在四个月的连续运行中,自无化生物膜实现了99%的降低,超过20 mg/L的Cr (VI) 降低到毒性较低的Cr (III).
- 增加H2压力从3到10 psig增强了Cr的去除从87%到99%和NO3的减少到95%以上.
- 甲基因组分析揭示了酸盐作为电子受体的关键作用,并确定了酸盐减少酶 (NrfA) 在缓解CrVI诱导的氧化应激方面.
结论:
- 对于工业废水中高度Cr (VI) 的长期生物修复,MBfR系统非常有效.
- 脱在MBfR中加速Cr (VI) 减少和排毒方面发挥着至关重要的作用.
- 了解潜在的微生物机制,特别是NrfA的功能,为优化生物反应器设计和性能提供了宝贵的见解.
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