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Synthesis of polyethylenimine modified sugarcane bagasse cellulose and its competitive adsorption of Pb2+, Cu2+ and Zn2+ from aqueous solutions

文献类型： 外文期刊

作者： Jiang, Wenyan 1 ; Xing, Yihao 2 ; Mo, Leixing 1 ; Liao, Jie 1 ; Chen, Wei 1 ; Wang, Haijun 1 ; Wang, Tianshun 1 ;

作者机构： 1.Guangxi Acad Agr Sci, Agroprod Qual Safety & Testing Technol Res Inst, Nanning 530007, Peoples R China

2.Genebank Guangxi Acad Agr Sci, Nanning 530007, Peoples R China

关键词： Synthesis; Competitive adsorption; Polyethylenimine; Sugarcane bagasse

期刊名称：DESALINATION AND WATER TREATMENT （ 影响因子：1.273； 五年影响因子：1.452 ）

ISSN： 1944-3994

年卷期： 2022 年 270 卷

页码：

收录情况： SCI

摘要： In this study, a new biosorbent was prepared from sugarcane bagasse and polyethylenimine (MSCP). The effects of preparation parameters, including the polyethylenimine (PEI) concentration, the glutaraldehyde concentration, the reaction temperature, and ball milling time on the adsorption property of MSCP were studied. The optimum preparation conditions were as follows: the PEI concentration was 20%, the glutaraldehyde concentration was 2.0%, the reaction temperature was 318.15 K, and the ball milling time was 20 min. Under the optimum preparation conditions, the removal efficiency of Cu2+ by MSCP was reached 93.3%. The physical and chemical properties of MSCP were determined by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy ( FTIR) and elemental analysis. The SEM micrographs revealed that surface morphology of MSCP was rough, with many irregular folds and small particles. The FTIR and elemental analysis results indicated PEI was successfully grafted to the surface of sugarcane bagasse cellulose (SC) with glutaraldehyde as a bridge and the adsorption mechanism of heavy metals by MSCP can be regarded as the complexation between heavy metals and -NH2 groups of MSCP. Langmuir model showed the best fitting to the isotherm equilibrium data, the maximum adsorption capacities for Cu2+, Pb2+ and Zn2+ were 114.02, 165.56 and 95.79 mg/g, respectively. The adsorption experimental data were fitted well by pseudo-second-order. In multi-solute system, the competitive adsorption ability of heavy metals by MSCP followed the order of Pb2+ > Cu2+ > Zn2+.

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