壳聚糖-氧化铁凝胶用于从水溶液中去除镉离子的研究
Use of Chitosan-Iron Oxide Gels for the Removal of Cd Ions from Aqueous Solutions.
作者信息
Mendizábal Eduardo, Ríos-Donato Nely, Ventura-Muñoz Minerva Guadalupe, Hernández-Montelongo Rosaura, Verduzco-Navarro Ilse Paulina
机构信息
Department of Chemistry, CUCEI, University of Guadalajara, Blvd. Marcelino García Barragán 1421, Guadalajara 44430, Jalisco, Mexico.
Department of Innovation Based on Information and Knowledge, CUCEI, University of Guadalajara, Blvd. Marcelino García Barragán 1421, Guadalajara 44430, Jalisco, Mexico.
出版信息
Gels. 2024 Sep 30;10(10):630. doi: 10.3390/gels10100630.
High-quality water availability is substantial for sustaining life, so its contamination presents a serious problem that has been the focus of several studies. The presence of heavy metals, such as cadmium, is frequently studied due to the increase in the contamination levels caused by fast industrial expansion. Cadmium ions were removed from aqueous solutions at pH 7.0 by chitosan-magnetite (ChM) xerogel beads and chitosan-FeO (ChF) xerogel beads in batch systems. Kinetic studies were best modeled by the Elovich model. The adsorption isotherms obtained showed an inflection point suggesting the formation of a second layer, and the BET model adjusted to liquid-solid systems was adequate for the description of the experimental data. Maximum uptake capacities of 36.97 ± 0.77 and 28.60 ± 2.09 mg Cd/g xerogel were obtained for ChM and ChF, respectively. The studied composites are considered promising adsorbent materials for removing cadmium ions from aqueous systems.
优质水的供应对于维持生命至关重要，因此其污染是一个严重问题，已成为多项研究的焦点。由于快速的工业扩张导致污染水平上升，镉等重金属的存在经常被研究。在分批系统中，壳聚糖-磁铁矿（ChM）干凝胶珠和壳聚糖-FeO（ChF）干凝胶珠在pH 7.0的条件下从水溶液中去除镉离子。动力学研究最好用埃洛维奇模型进行模拟。得到的吸附等温线显示有一个拐点，表明形成了第二层，适用于液固系统的BET模型足以描述实验数据。ChM和ChF的最大吸附容量分别为36.97±0.77和28.60±2.09 mg Cd/g干凝胶。所研究的复合材料被认为是从水系统中去除镉离子的有前途的吸附材料。
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