Preparation of pectin/poly(m-phenylenediamine) microsphere and its application for Pb2+ removal

文献类型： 外文期刊

第一作者： Wang, Xue-dong

作者： Wang, Xue-dong;Chen, Ming-shun;Liu, Cheng-mei;Liang, Rui-hong;Chen, Jun;Li, Ya;Dai, Tao-tao;He, Xue-mei

作者机构：

关键词： Pectin; Poly(m-phenylenediamine); Hydrogel; Lead ions; Adsorbent

期刊名称：CARBOHYDRATE POLYMERS （ 影响因子：7.182； 五年影响因子：6.89 ）

ISSN： 0144-8617

年卷期： 2021 年 260 卷

页码：

收录情况： SCI

摘要： Novel pectin/poly(m-phenylenediamine) (P/PmPDA) microspheres with different content of PmPDA were prepared by assembling PmPDA on the surface of pectin microsphere. The successful preparation was confirmed by the results of Fourier Transform Infrared spectra (FTIR), scanning electron microscopy (SEM) and elemental analysis. Compared with pectin microsphere, the Pb2+ adsorption performance of P/PmPDA microspheres was significantly improved. The results of batch adsorption experiments were in good agreement with the Langmuir isotherm model for Pb2+ adsorption, indicating the adsorption was monolayer. The maximum adsorption capacity of Pb2+ was found to be 390.9 mg/g. The kinetic adsorption process was well described by the pseudo second-order model and chemical adsorption dominated the adsorption process. The potential mechanisms of Pb2+ adsorption were speculated as ion exchange and chelation, which were supported by X-ray photoelectron spectroscopy (XPS). The P/PmPDA microspheres showed good recyclability after five adsorption/desorption cycles. All these results indicated the potential of P/PmPDA microspheres for removing Pb2+.

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