零价值铁在微生物提取中的异胎应用,同时产生电能
Fan Chen1, Miao Lv2, Jingjing Wang1
1Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an 710129, PR China.
Journal of hazardous materials
|September 27, 2025
概括
一个基于Fe(0) 的新型自发微生物电化学系统有效地从废水中去除 (U(VI),同时产生电力. 这种Fe ((0) -SMEC系统增强了电子使用和回收,为采矿废水处理提供了可持续的解决方案.
科学领域:
- 环境科学与工程环境科学与工程
- 电化学 电化学 电化学
- 环境微生物学 环境微生物学
背景情况:
- 矿山废水中的 (U ((VI)) 污染对环境构成风险,需要有效的清除和回收.
- 现有的零价值铁辅助微生物U(VI) 减少方法面临着低电子利用率和系统复杂性等挑战.
- 开发用于同时去除和发电的综合系统对于可持续的废水管理至关重要.
研究的目的:
- 展示一种基于Fe{0}的自发微生物电化学 (Fe{0}-SMEC) 系统,用于同时去除U{6}和发电.
- 通过空间分离阳极Fe ((0) 氧化和微生物U ((VI)) 减少,提高电子利用率和去除效率.
- 调查U(VI) 固定化的机制以及微生物群落在Fe(0) -SMEC系统中的作用.
主要方法:
- 使用空间分离的阳极和生物阴极的Fe(0) -SMEC系统的建造和运行.
- 监测合成和真实矿废水中的U(VI) 清除效率和动力学.
- 测量Fe(0) -SMEC系统的发电性能.
- 使用元基因组和元转录组方法分析固定产品和微生物社区结构和功能.
主要成果:
- 在48小时内,Fe(0)-SMEC系统从合成废水中提取了81.7%-96.4%的U(VI) 和从实际矿山废水中提取了73.3%-78.7%.
- 与Fe(0) -微生物混合系统相比,去除动力学是2.8-5.5倍快.
- 该系统产生了相当大的功率输出 (合成废水为0.136W,真实废水为0.109W).
- 固定发生通过微生物生物还原和酸盐生物矿物化,形成酸和U (IV) 沉.
- 富含电活性和降解金属细菌的生物膜,具有直接和间接电子转移的基因,是减少U(VI) 的关键.
结论:
- Fe(0)-SMEC系统提供了一种高效且具有成本效益的策略,可以同时从污染的废水中提取和发电.
- 空间分离电化学和生物过程优化了电子转移,提高了系统性能.
- 微生物群落在通过综合代谢途径在生物还原和固定中发挥着至关重要的作用.
- 这项技术为可持续的回收和矿区环境修复提供了有希望的方法.
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