洞察有效的Cr(VI) 从水溶液中通过富含铁的小麦草水电炉去除的机制:将DFT计算与实验相结合
Chengcheng Wei1, Fei Jiang1, Qi Cao1
1College of Resources and Environment Science, Anhui Science and Technology University, Fengyang 233010, China.
Langmuir : the ACS journal of surfaces and colloids
|July 2, 2024
概括
改性炭有效地从水中去除有毒的六价 (Cr(VI)). 铁改性球磨水炭 (Fe-MHBC) 具有很高的吸附能力,并促进了Cr (VI) 的减少,为水污染提供了可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 农业固体废弃物越来越多地用于生产可持续材料水炭.
- 六价 (Cr(VI)) 由于其毒性,对环境和健康构成重大风险.
- 开发高效和环保的吸附剂来去除Cr (VI) 对于环境修复至关重要.
研究的目的:
- 从小麦中合成和表征铁改性 (Fe-MHBC) 以进行Cr (VI) 吸附.
- 调查Fe-MHBC对Cr6的吸附性能和去除机制.
- 评估Fe-MHBC作为Cr (VI) 污染处理的可持续吸附剂的潜力.
主要方法:
- 两种类型的球磨炭,Fe-MHBC和MHBC,是使用小麦草水炭合成的.
- 进行了Cr(VI) 吸附实验,分析了吸附能力,动力学和热力学.
- 材料的特征包括X射线光电子光谱 (XPS) 和泽塔电位测量;密度功能理论 (DFT) 用于理论分析.
主要成果:
- 对于CrVI,Fe-MHBC的最大吸附能力为116.29毫克-1克.
- 吸附遵循伪二次动力学,是一个自发的过程,由酸性条件和静电吸引力增强.
- 在Fe-MHBC中的Fe (II) 活性降低了Cr (VI),而DFT证实了由于铁的增强吸附和电子转移.
结论:
- Fe-MHBC是一种高效的吸附剂,可通过静电吸附,氧化还原反应和复合的组合去除Cr (VI).
- 修改后的酸盐表现出优异的Cr (VI) 去除效率,即使在高pH值下也是如此,并且能够抵抗离子干扰.
- Fe-MHBC 是一个有希望的,环保的解决方案,用于处理Cr (VI) 污染的水源.
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