聚乙烯胺修改扩展的维米古利特支持的纳米零铁用于Cr(VI) 从水溶液中去除
Xinyu Yang1, Yan Mu1, Lina Zhang1
1Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps, College of Chemistry and Chemical Engineering, Tarim University, Alar 843300, China.
Materials (Basel, Switzerland)
|July 12, 2025
概括
一种新型的吸附剂,纳米零价值铁支持氨基基改性扩展甲 (nZVI@PEI/EVMT),有效地去除重金属离子. 这种环保材料具有很高的吸附能力和磁性可分离性,可用于Cr6的去除.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 重金属离子污染对环境和健康构成重大风险.
- 开发高效和环保的吸附剂对于水资源整治至关重要.
- 纳米零价值铁 (nZVI) 是有希望的,但需要稳定和提高性能.
研究的目的:
- 为了合成和表征一种氨基基基改性扩展的,维米库利特支持的纳米零价值铁 (nZVI@PEI/EVMT) 吸附剂.
- 为了评估nZVI@PEI/EVMT对Cr (VI) 吸附的效率.
- 为了阐明吸附机制和动力学.
主要方法:
- 使用聚乙烯胺 (PEI) 和扩展色素 (EVMT) 制备nZVI@PEI/EVMT.
- 吸附剂的结构和磁性属性的表征.
- 批量吸附实验以确定最佳条件 (质量比,pH) 和吸附动力学/异极热量.
主要成果:
- 对于磁分离,nZVI@PEI/EVMT 的和磁场为 41.5 emu/g.
- 最佳的Cr (VI) 吸附发生在pH 2时,质量比为1:1的nZVI@PEI/EVMT.
- 在30°C和pH2下,最大吸附容量达到116.2mg/g,遵循伪二次动力学和兰木尔异热模型.
结论:
- nZVI@PEI/EVMT是一种有效的,磁性可分离的吸附剂,用于Cr (VI) 的去除.
- 吸附机制涉及静电吸引,减少,化学复杂化和共同沉.
- 该材料在多个吸附-脱附周期中表现出良好的可重复使用性.
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