在酸盐修饰纤维素上吸附和:实验和计算见解
Alessio C Perri1, Giorgio De Luca2, Nasser Al-Hamdani2
1Department of Chemistry and Chemical Technologies, University of Calabria, Rende, CS 87036,Italy.
纤维素酸盐通过吸附有效地去除稀土元素 (Nd) 和 (Y). 这种绿色合成方法为Nd和Y分离提供了一个可持续的替代方案,选择性受度和pH的影响.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 稀土元素的分离 稀土元素的分离
背景情况:
- 稀土元素 (和) 对于现代技术至关重要.
- 分离Nd和Y具有挑战性,溶剂提取是占主导地位但对环境征税的方法.
- 吸附为稀土元素回收提供了一种可持续且具有成本效益的替代方案.
研究的目的:
- 评价纤维素酸盐 (CC) 作为吸附剂用于 (Y) 和 (Nd) 的去除.
- 用实验和计算方法研究吸附机制.
- 探索从Spartium junceum中获得纤维素酸盐的绿色合成方法.
主要方法:
- 从原始纤维素和酸中合成纤维素酸的绿色合成.
- 实验吸附研究不同接触时间,pH值和金属度.
- 使用密度函数理论 (DFT) 和分子力学 (MM) 模拟的计算建模.
主要成果:
- 纤维素酸盐在吸附Y和Nd方面表现出高效率.
- 吸附依赖于pH值,在60分钟左右达到平衡.
- 选择性有所不同:Y在较低度时更受青,Nd在较高度时更受青,在pH 3以下具有显著的Nd选择性.
- DFT和MM模拟证实了实验结果,并阐明了吸附机制.
结论:
- 纤维素酸盐是一种有前途的,环保的吸附剂,用于Y和Nd的分离.
- 这项研究提供了对在功能化的纤维素上稀土元素吸附的机制性见解.
- 这项研究支持稀土元素回收和回收的可持续实践.
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