通过有效的吸附性去除从甲酸盐溶液,使用阴离子离子交换树脂
Kunkun Chen1,2, Linbo Li1, Kai Yang1
1School of Metallurgical Engineering, Xi'an University of Architecture and Technology Xi'an 710055 China yj-lilinbo@xauat.edu.cn.
RSC advances
|January 20, 2025
概括
预处理的C160H电离子树脂有效地从烧结器中去除有害的杂质,达到99.28%的效率. 这种离子交换过程是外热的和可再生的,为酸盐提供了具有成本效益的净化.
科学领域:
- 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.
- 环境化学环境化学
背景情况:
- 是烧结器中有害的杂质,对机械性能和密度产生负面影响.
- 电离子树脂为去除杂质提供了可行的解决方案.
研究的目的:
- 通过HNO3预处理,提高强酸酸交换树脂C160H的去除性能.
- 研究预处理树脂的物理化学特性,吸附效率和去除机制.
主要方法:
- 使用HNO3.3对C160H树脂进行预处理.
- 使用BET,SEM和零电荷点 (PZC) 测量进行表征.
- 在各种条件下 (度,温度,pH,时间,固体/液体比率) 的吸附实验.
- 热力学和动力学建模 (异热吸附,伪二次动力学).
- 密度函数理论 (DFT) 计算用于机制阐明.
- 十个周期的再生研究.
主要成果:
- 预处理的C160H树脂显示了较低的PZC值,增强了吸附.
- 在最佳条件下达到99.28%的最大吸附效率 (2.00 g L-1 KReO4,25 °C,pH 7.0,6 h, 1:20比).
- 吸附遵循异质的,外热热力学,最好用伪二次动力学来描述,表明化学过程.
- DFT证实了由静电相互作用驱动的离子交换 (H+为K+).
- 树脂在十个再生周期后保持了>99%的吸附效率.
结论:
- HNO3预处理显著提高了C160H树脂的吸附能力.
- C160H树脂提供了一种高效,可再生和潜在的成本效益的方法,通过去除杂质来净化酸盐.
- 了解吸附机制和动力学有助于优化树脂使用和工艺设计.
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