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使用纳米零价值铁和减少的细菌从废水中去除Cr (VI)

Xiangpeng Tan¹, Jianwei Yang¹, Muhammad Shaaban²

¹School of Environmental Engineering, Wuhan Textile University, Wuhan, 430073, People's Republic of China.

Environmental science and pollution research international

|October 17, 2023

概括

这项研究开发了一种结合纳米零价值铁 (nZVI) 和降解细菌 (CrRB) 的新系统,以有效地从水中去除CrVI. 纳米生物协同效应显著增强了Cr(VI) 消除,提供了一个可持续的环境解决方案.

科学领域:

环境科学与工程环境科学与工程
纳米技术纳米技术
微生物学微生物学
修复水资源的修复方法

背景情况:

全球努力的重点是为了环境的可持续性,从水中去除有毒金属.
纳米材料和微生物之间用于去除有毒金属的相互作用机制仍未得到充分探索.
六价 (Cr(VI)) 是一个重要的水污染物,需要有效的补救策略.

研究的目的:

开发和研究一种新的系统,将纳米零价值铁 (nZVI) 与降解细菌 (CrRB) 集成在一起.
评估nZVI和CrRB在从水中去除Cr (VI) 的协同效率.
通过纳米-生物协同作用阐明Cr(VI) 除去的潜在机制.

主要方法:

整合nZVI与CrRB进行Cr(VI) 补救.
系统参数的实验优化,包括pH,nZVI剂量,CrRB注射和初始CrVI度.
特性分析,高通量测序和光定量PCR用于研究微生物和纳米材料相互作用.

主要成果:

结合的nZVI-CrRB系统实现了77.73%的Cr(VI) 清除率,比单独的CrRB提高了17.61%.
最佳条件 (pH 5,nZVI > 2 g/L) 导致在36-72小时内完全去除Cr.
CrRB及其细胞外聚合物有效地减少和复杂化了Cr(VI),提高了nZVI的效率并促进了CrRB社区的增长.

结论:

nZVI和CrRB之间的协同作用显著提高了Cr (VI) 去除效率.
nZVI促进了CrRB的活动,而CrRB通过表面被动化层溶解来提高nZVI的性能.
这种纳米生物协同方法为Cr(VI) 修复应用提供了坚实的理论基础.

关键词:

细菌细菌是一种细菌.(Chromium) 是一种含的物质.纳米技术纳米技术有毒性有毒性废水是废水,废水就是废水.没有价值的铁.

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