结构化LDH/本托尼特复合材料用于从水溶液中去除和回收
Mitra De Geest1, Bart Michielsen2, Radu-G Ciocarlan1
1Laboratory of Adsorption & Catalysis, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.
Molecules (Basel, Switzerland)
|June 28, 2023
概括
这项研究表明,使用层叠的双氧化物 (LDH) - 矿复合材料有效地去除. 结构材料具有高吸附能力和高效的再生,可用于水处理中的多循环使用.
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:
- 水中的污染对环境和健康构成重大风险.
- 吸附和离子交换是去除有毒重金属如的关键方法.
- 层状双氧化物 (LDH) 和本托尼特是水处理的有希望的材料.
研究的目的:
- 开发和优化结构化化层双氧化物 (LDH) - - 矿复合材料,以去除.
- 研究Cr3+和Cr6+物种的吸附动力学和吸附机制.
- 为了优化再生过程的多循环应用的吸附剂.
主要方法:
- 将烧焦的MgAl-LDH/本托尼特粉末结构化成颗粒物.
- 优化用于Cr吸收的LDH/矿比率.
- 吸附和脱吸的动态建模 (伪二阶) 吸附和脱吸.
- 使用XRD和拉曼光谱的表征.
- 通过多个吸附-脱附周期评估再生效率.
主要成果:
- 最佳的化吸附剂成分是80%重量LDH和20%重量土.
- 获得了高吸附能力:Cr3+为48 mg/g,Cr6+为40 mg/g.
- 一个伪二次运动模型准确地描述了吸附和脱吸.
- 使用2M NaCl溶液的再生在五个循环中显示了近100%的效率.
- XRD和拉曼分析证实了的成功吸收,并阐明了吸附机制.
结论:
- 结构化MgAl-LDH/本托尼特复合材料在从水中去除方面非常有效.
- 优化的吸附剂具有出色的可回收性,使其适合大规模应用.
- 该研究提供了一种可靠的整治方法,具有工业实施的潜力.
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