聚乙烯胺基改性奇托稳定纳米零价值铁,用于增强从酸性水溶液中去除Cr (VI):性能和机制
Yuqin Yang1, Yunlan Xu1, Dengjie Zhong1
1School of College of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, China.
International journal of biological macromolecules
|November 1, 2025
概括
一种新型复合材料,S-nZVI@CP,有效地从废水中去除Cr (VI). 这种硫化纳米级零价值铁和酸盐复合物为环境修复提供了超高的吸附和减少能力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术 纳米技术
背景情况:
- 六价 (Cr(VI)) 对环境和健康构成重大风险.
- 传统的废水处理方法经常面临效率和稳定性的挑战.
- 开发具有高性能的新型吸附剂对于有效的Cr (VI) 补救至关重要.
研究的目的:
- 合成和表征一种新型复合材料 (S-nZVI@CP),用于增强Cr6的去除.
- 使用开发的复合材料,研究Cr (VI) 的吸附和减少机制.
- 评估用于废水处理的S-nZVI@CP复合物的稳定性和可重复使用性.
主要方法:
- 通过修改基托 (CS) 与聚乙烯胺 (PEI) 并加入硫化纳米级零价值铁 (S-nZVI) 来制备S-nZVI@CP.
- 使用FTIR,XRD和电化学方法进行表征,以确认合成和特性.
- 批量实验以确定最佳条件 (pH,剂量,初始度) 和评估性能 (去除率,吸附能力,动力学,等温).
主要成果:
- 成功合成了具有核心外结构的S-nZVI@CP,解决了nZVI聚合.
- 在最佳条件下 (pH2.0,0.6 g/L剂量,初始度为100 mg/L) 达到100%的Cr (VI) 清除率.
- 在318K下,最大吸附能力为574.69mg/g,遵循伪二次动力学和兰格穆尔异热法.
- 在6个循环和30天的老化过程中证明了出色的稳定性和可重复使用性.
结论:
- S-nZVI@CP表现出优越的吸附和减少能力,用于Cr6的去除.
- PEI的修改提高了CS的性能,而硫化提高了S-nZVI的稳定性和反应性.
- 复合材料显示出有效和稳定的处理Cr (VI) 污染废水的巨大潜力.
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