通过零价值铁与异质和自身养细菌相结合,从生物洗废水中提升Cr (VI) 的去除和稳定
Yuhang Yang1, Bing Li1, Mingxi Li1
1School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
Journal of environmental management
|July 11, 2024
概括
这项研究将零价值铁 (Fe0) 与细菌结合起来,以增强废水中的Cr (VI) 清除. 协同系统显著促进了Cr6的减少和稳定,提供了一个有前途的废水处理方法.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 材料科学 材料科学 材料科学
背景情况:
- 六价 (Cr(VI)) 构成环境风险,特别是在Cr.渣的生物洗废水中.
- 零价值铁 (Fe0) 是有效的Cr(VI) 移除,但面临着挑战,如有机酸复合和被动化.
- 生物溶解过程会产生含有复杂有机和无机污染物的废水.
研究的目的:
- 开发一个结合Fe0和混合细菌的协同系统,以提高Cr (VI) 的降低和稳定.
- 研究生物Fe0系统中改善Cr(VI) 清除背后的机制.
- 评估Cr固定产品的稳定性和操作参数的影响.
主要方法:
- 建立了一个集成Fe0与混合异质型和自身型细菌的系统.
- 固相特征 (例如,X射线光电子光谱) 用于分析Fe0表面和Cr.产品.
- 评估了Cr (VI) 去除效率,Cr价值分布和再氧化稳定性.
主要成果:
- 综合系统显示,与非生物Fe0.0相比,Cr(VI) 的去除增加了6.1倍.
- 细菌活动导致了铁的腐蚀和结构化的Fe (II) 矿物质的形成,增强了Cr (VI) 的吸附和减少.
- 固定Cr产品 (例如Fe$_{x}$Cr$_{1-x}$(OH) $_{3}$,Cr$_{2}$O$_{3}$) 显示出优越的抗氧化稳定性.
结论:
- 异构型和自构型细菌在增强Fe0的Cr6降解和稳定能力方面发挥着至关重要的作用.
- 协同系统提供了一种有希望和稳定的方法来处理受Cr (VI) 污染的生物洗废水.
- 有机酸度和Fe0剂量等操作参数与在生物极限内的Cr (VI) 去除具有正相关性.
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