Fabrication of polyethylenimine functionalized magnetic cellulose nanofibers for the sorption of Ni(II), Cu(II) and Cd(II) in single-component and multi-component systems
Fabrication of polyethylenimine functionalized magnetic cellulose nanofibers for the sorption of Ni(II), Cu(II) and Cd(II) in single-component and multi-component systems
复制标题
聚乙烯亚胺功能化磁性纤维素纳米纤维的制备，用于单组分和多组分体系中 Ni(II)、Cu(II) 和 Cd(II) 的吸附
DOI：
10.1016/j.ijbiomac.2021.06.041
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发表时间：
2021-06-15
影响因子：
8.2
通讯作者：
Xu, Jinzhang
中科院分区：
文献类型：
--
作者：
Guo, Zhiqiang;Yang, Rongrong;Xu, Jinzhang
以香蕉皮为原料，制备了新型聚乙烯亚胺功能化纤维素纳米纤维磁性复合材料(PEI-CNFS@Fe3O4)，用于在单组分和多组分体系中吸附Ni(II)、Cu(II)和Cd(II)。采用批量实验、光谱分析和模型拟合等方法对吸附性能进行了研究。PEI-CNFS@Fe3O4对Ni(II)、Cu(II)和Cd(II)的吸附均符合Langmuir等温线和准二级动力学模型。PEICNFS@Fe3O4对Ni(II)、Cu(II)和Cd(II)的最大吸附容量分别为134.38、93.71和173.56 mg g-1。Ni(II)、Cu(II)和Cd(II)在PEI-CNFS@Fe3O4上的主要吸附机理是氨基、羧基和羟基与Ni(II)、Cu(II)和Cd(II)离子的强烈表面络合。其中，PEI的引入有助于提高PEI-CNFS@Fe3O4对重金属的吸附能力。此外，离子半径的大小和与PEI-CNFS@Fe3O4表面络合能力的强弱是造成Cd(II)、Cd(II)和Cd(II)(Cd(II)&Gt；Ni(II)&Gt；Cu(II))对Ni(II)、Cu(II)和Cd(II)吸附能力不同的原因。综上所述，PEI-CNFS@Fe3O4具有成本低、制备简单、易磁选、环境友好、吸附容量大等优点，在处理多重金属污染水中具有广阔的应用前景。
Novel polyethyleneimine functionalized cellulose nanofiber magnetic composites (PEI-CNFs@Fe3O4) were prepared using banana peels as the raw materials for the sorption of Ni(II), Cu(II) and Cd(II) in single-component and multi-component systems. The batch experiments, spectral analyses and model fittings were used to reveal the sorption properties. The sorption of Ni(II), Cu(II) and Cd(II) on PEI-CNFs@Fe3O4 all conformed to the Langmuir isotherm and pseudo-second-order kinetic models. And the maximum sorption capacities of PEICNFs@Fe3O4 towards Ni(II), Cu(II) and Cd(II) were 134.38, 93.71 and 173.56 mg g-1, respectively. The main sorption mechanism of Ni(II), Cu(II) and Cd(II) on PEI-CNFs@Fe3O4 is the strong surface complexation of the amino, carboxyl and hydroxyl groups with Ni(II), Cu(II) and Cd(II) ions. Especially, the introduction of PEI contributed to the improvement in the sorption capacities of PEI-CNFs@Fe3O4 towards the heavy metals. Besides, the size of the ionic radius and the strength of the surface complexing ability with PEI-CNFs@Fe3O4 are the reasons for the difference in the sorption capacities of Ni(II), Cu(II) and Cd(II) (Cd(II) > Ni(II) > Cu(II)). In conclusion, PEI-CNFs@Fe3O4 has shown the advantages of low cost, simple preparation, easy magnetic separation, environmental friendliness and high sorption capacity, thus having a broad application prospect in the treatment of multi-heavy metals polluted water.