酸盐改性零价铁增强了介导的界面键粘附和埃舍里希亚大肠杆菌的无活化
Yuqing Hu1, Nuanqin Zhang1, Xiang Zhang1
1Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction (Ministry of Education), College of Chemistry, Central China Normal University, Wuhan 430079, China.
Water research
|May 7, 2025
概括
用二酸盐化零价值铁 (ZVI) 增强了ZVI细菌的附着性,导致大肠杆菌 (E. coli) 的优异消毒和有效从水中去除.
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:
- 微生物与表面的相互作用在水过程中至关重要.
- 零价值铁 (ZVI) 是一个有前途的消毒剂,但受到有限的ZVI-细菌接触的影响.
- 定制接口接触可以提高消毒效率.
研究的目的:
- 用二酸 (KH2PO4) 来修改ZVI表面,以改善大肠杆菌 (大肠杆菌) 的粘附和无活化.
- 为了研究增强粘附和失活的机制.
- 在批量和连续流系统中评估修改后ZVI的消毒性能.
主要方法:
- 使用KH2PO4 (P-ZVIbm) 的球磨法对ZVI的表面进行修改.
- 扩展的德贾金-兰多-格雷-维维-奥弗比克 (ExDLVO) 模拟来分析接口相互作用.
- 减弱总反射率里埃转换红外光谱 (ATR-FTIR) 和密度函数理论 (DFT) 计算来研究键.
- 批量实验以评估杀菌效率.
- 模拟地下水处理的连续流沙柱实验.
主要成果:
- 由于减轻了易斯酸排斥和加强了结,P-ZVIbm显著增强了ZVI和大肠杆菌之间的粘附性.
- 在P-ZVIbm上的酸盐部分与细菌蛋白形成双键,缩短键长度.
- P-ZVIbm实现了99.2%的大肠杆菌失活,明显高于未经修改的ZVIbm (33.9%).
- 连续流系统使用P-ZVIbm包装沙子证明了有效的小肠杆菌去除100 CFU/mL以下.
结论:
- 酸化是一种有效的策略,用于增强ZVI-细菌的粘附性,用于接触绝育.
- P-ZVIbm为水处理提供了一种卓越的消毒剂.
- 这种方法有可能开发出用于废水处理的新型消毒技术和生物膜载体.
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