<br>新型聚乙烯吡咯烷酮/壳聚糖-希夫碱/Fe2O3纳米复合材料的制备，用于有效吸附水溶液中的Pb(II)和Hg(II)离子,International Journal of Biological Macromolecules

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新型聚乙烯吡咯烷酮/壳聚糖-希夫碱/Fe2O3纳米复合材料的制备，用于有效吸附水溶液中的Pb(II)和Hg(II)离子
International Journal of Biological Macromolecules ( IF 7.7 ) Pub Date : 2024-05-07 , DOI: 10.1016/j.ijbiomac.2024.132161
Yu Fang ₁ , Junqiang Hu ₁ , Yifan Fu ₁ , Tingting Geng ₁

Affiliation

采用一锅法简易共沉淀法制备了一种新型磁性聚乙烯吡咯烷酮/壳聚糖-席夫碱/Fe3O(PVP/CS-SB/Fe3O)吸附剂，用于吸附水溶液中的Pb(II)和Hg(II)离子。采用傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、扫描电子显微镜（SEM）、振动样品磁力计（VSM）和Brunauer-EmmettTeller（BET）对合成的PVP/CS-SB进行表征/FeO。结果预测磁性CSSB-PVP@FeO的合成成功。研究了溶液pH值、接触时间、金属离子浓度、吸附剂剂量和共存离子等重要因素对Pb(II)和Hg(II)吸附的影响。最佳条件下Pb(II)和Hg(II)离子的最大吸附容量分别为120 mg/g和102.5 mg/g。动力学研究预测，吸附遵循准二级（PSO）模型作为化学吸附，利用 PVP/CS-SB/FeO 活性位点与金属离子的配位以及 n-π 相互作用。重现性结果预测6次吸附循环后具有优异的再生能力。根据这项工作的结果，PVP/CS-SB/Fe3O纳米复合材料在 Pb(II) 和 Hg(II) 离子吸附方面具有广阔的前景，并且有可能作为一种简单、低成本、高效的吸附剂用于净化水溶液中的其他重金属离子。

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Fabrication of a novel polyvinylpyrrolidone/chitosan-Schiff base/Fe2O3 nanocomposite for efficient adsorption of Pb(II) and Hg(II) ions from aqueous solution

A novel magnetic polyvinylpyrrolidone/chitosan-Schiff base/FeO (PVP/CS-SB/FeO) adsorbent was prepared by one-pot facile co-precipitation route for adsorption of Pb(II) and Hg(II) ions from aqueous solution. Fourier transform infrared-spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), vibrating sample magnetometer (VSM) and Brunauer-EmmettTeller (BET) were used to characterize the synthesized PVP/CS-SB/FeO. The results predicted that the successfully synthesis of magnetic CSSB-PVP@FeO. The effects of important factors such as pH solution, contact time, concentration of metal ions, adsorbent dose and co-existing ions on Pb(II) and Hg(II) adsorption were investigated. The maximum adsorption capacities of Pb(II) and Hg(II) ions at optimal conditions were 120 mg/g and 102.5 mg/g, respectively. The kinetic studies predicted that the adsorption followed the pseudo-second-order (PSO) model as chemisorption using the coordination of active sites of PVP/CS-SB/FeO with the metal ions and also n-π interactions. Reproducibility results predicted that the excellent regeneration ability after 6 adsorption cycles. According to the results of this work, the PVP/CS-SB/FeO nanocomposite is promising for Pb(II) and Hg(II) ions adsorption and can be potential as a simple, low-cost, high-efficient adsorbent for decontamination of other heavy metal ions from aqueous solution.

更新日期：2024-05-07

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