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作为Eu³⁺回收的再生系统的IOTA-卡拉基南:吸附/脱附循环

Oshrat Levy-Ontman¹, Shir Nagar¹, Ofra Paz-Tal²

¹Department of Chemical Engineering, Shamoon College of Engineering, Beer-Sheva, Israel.

Environmental technology

|September 20, 2024

概括

约塔-卡拉基安水凝有效地从废水中去除欧离子. 这些可生物降解的珠子是可重复使用的,在多个循环中显示出更高的吸附效率,以及理想用于重金属去除的多孔结构.

科学领域:

材料科学材料科学材料科学
环境科学环境科学
化学化学化学

背景情况:

像卡拉这样的多糖类是去除重金属的环保吸附剂.
之前的研究表明,卡拉基南在吸附兰化物和动化物离子方面具有有效性.

研究的目的:

为了研究从水中吸附欧离子 (Eu3+) 的iota-carrageenan水凝.
为了评估这些水凝珠在多个循环中的脱落和可重复使用性.

主要方法:

用于制备与CaCl2.2交联的IOTA-carrageenan水凝珠.
用500mg/L Eu3+溶液进行吸附实验.
使用NaNO3进行脱,并分析吸附动力学.
使用冷SEM,SEM,SEM-EDS和TGA进行表征.

主要成果:

使用1%和2%的IOTA-CARRAGENAN珠子,分别获得了50%和65%的最大吸附产量.
吸附跟随伪二阶动力学,表明化学吸收.
在第一个周期中,吸收率分别为57%和74%,在随后的周期中效率提高.
珠子在三个循环中表现出稳定性和可重复使用性,在脱落后有增强的多孔性.

结论:

约塔-卡拉基安南水凝是有效的,可重复使用的吸附剂,用于去除欧离子.
水凝结构和离子交换机制有助于有效的吸附和脱吸.
这些发现支持在废水处理中使用基于卡拉基的水凝,用于重金属整治.

关键词:

胡卜素是什么胡卜素是什么消吸方式消吸方式欧洲联盟 (europium) 是一个欧洲联盟.吸收吸收吸收吸收废水是废水,废水就是废水.

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