铁纳米颗粒在anammox系统中的命运:溶解,迁移和转换
Xun Weng1, Hui-Min Fu2, Zheng Mao3
1Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing, 400045, China.
Journal of environmental management
|October 18, 2023
概括
废水处理厂中的铁纳米粒子 (FeNPs) 释放铁离子,并与污泥结合. FeNPs转化为Fe3O4,对anammox系统产生影响,但最终在其内部稳定.
科学领域:
- 环境科学 环境科学
- 环境化学环境化学
- 微生物学 微生物学
背景情况:
- 铁纳米粒子 (FeNPs) 在工业过程中普遍存在,并进入废水处理厂 (WWTP).
- 在WWTP中FeNPs的行为,特别是在无氧氨氧化 (anammox) 系统中,尚未完全理解.
- 对anammox系统稳定性和排放废水或生物质的潜在影响需要进行调查.
研究的目的:
- 为了阐明FeNPs在anammox颗粒污泥 (AnGS) 中的命运和转化.
- 为了评估FeNPs和anammox细菌及其细胞外聚合物质 (EPS) 之间的相互作用.
- 提供关于在FeNPs暴露下保持anammox系统稳定性的见解.
主要方法:
- 使用AnGS和FeNPs进行暴露实验.
- 分析FeNP溶解,与EPS结合,以及细胞内吸收.
- 在anammox系统中观察FeNP聚合,沉积和转化.
主要成果:
- 在与水接触时FeNPs释放Fe2+离子.
- Fe2+离子被EPS功能组结合并被细菌吸收.
- 在AnGS表面聚合的FeNPs,沉积在反应堆中,并转化为稳定的Fe3O4.
结论:
- FeNPs经历溶解,转化,并稳定地纳入anammox系统.
- 了解FeNP命运对于在受污染的环境中管理anammox系统至关重要.
- 该研究为确保暴露于FeNPs的anammox过程的运行稳定提供了见解.
关键词:
无氧氨氧化 (anammox) 是一种无氧氨氧化方法.亚纳莫克斯颗粒污泥 (AnGS) 是一种细胞外聚合物质 (EPS) 是一种铁的形式 铁的形式铁纳米粒子 (FeNPs) 是一种铁纳米粒子.更多相关视频
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