新型木质素基离子交换树脂的合成及其在重金属去除中的应用,Industrial & Engineering Chemistry Research

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新型木质素基离子交换树脂的合成及其在重金属去除中的应用
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : December 24, 2012 , DOI: 10.1021/ie301863e
Feng-Bing Liang ₁ , Yan-Lei Song ₁ , Chong-Pin Huang ₁ , Ying-Xia Li ₁ , Biao-Hua Chen ₁

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木质素磺酸钠与葡萄糖在酸性条件下的缩聚反应制备了一种新的木质素基树脂（LBR）。通过扫描电子显微镜（SEM），X射线衍射（XRD），X射线光电子能谱（XPS），傅里叶变换红外（FTIR）光谱，热重分析（TGA）和¹³对LBR的物理和化学性质进行了表征C交叉极化魔角旋转核磁共振（¹³C CP MAS NMR）。结构分析表明，所得球形颗粒由具有高密度酸性基团和高热稳定性的无定形交联苯基丙烷基聚合物组成。研究了重金属（Cr（III），Cu（II），Ni（II），Pb（II）和Cd（II））在LBR上的吸附性能。Langmuir，Freundlich和Dubinin–Radushkevich（DR）模型用于分析实验数据。LBR对五种金属的最大吸附能力按以下顺序排列：Pb（II）≫ Cu（II）> Cd（II）> Ni（II）≈Cr（III）。还通过伪一级，伪二级和粒子内扩散动力学模型测试了实验数据。伪二级模型很好地描述了LBR上所有金属离子的吸附过程。而且，

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Synthesis of Novel Lignin-Based Ion-Exchange Resin and Its Utilization in Heavy Metals Removal

A new lignin-based resin (LBR) was prepared by condensation polymerization of sodium lignosulfonate with glucose under acidic conditions. The physical and chemical properties of LBR were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and ¹³C cross-polarization magic angle spinning nuclear magnetic resonance (¹³C CP MAS NMR). Structure analyses revealed that the resulting spherical particles are composed of amorphous cross-linked phenylpropane-based polymers that have a high density of acidic groups and high thermal stability. The adsorption performance of heavy metals (Cr(III), Cu(II), Ni(II), Pb(II), and Cd(II)) onto LBR were investigated. Langmuir, Freundlich, and Dubinin–Radushkevich (D-R) models were applied to analyze the experimental data. The maximum adsorption capacity of LBR for the five metals was in the following order: Pb(II) ≫ Cu(II) > Cd(II) > Ni(II) ≈ Cr(III). The experimental data were also tested by pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic models. The adsorption process of all metal ions on LBR is well-described by the pseudo-second-order model. Moreover, the regeneration method of LBR was also studied.

更新日期：2017-01-31

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