Chitosan (CTS) and polyvinyl alcohol (PVA) are two environmentally friend polymers. In this research, methacrylate-modified FDU-12 (FDU-12-NH₂) nanoparticle was synthesized. It was used in the preparation of CTS/PVA/FDU-12-NH₂ (2%, 5% w) composites. Fourier transfer infrared spectroscopy, nitrogen adsorption/desorption, and transmission electron microscopy techniques were applied for the characteristics of the composites. Then, the produced composites were used as the adsorbents to remove cadmium (II) from the aqueous solutions. The optimal conditions of the Cd (II) adsorption factors were achieved. The different isotherms and kinetic models were applied to obtain the equilibrium adsorption information. The results indicated that Freundlich isotherm was the best isotherm model. Also, the kinetic model followed the pseudo-second-order. The maximum adsorption capacities were found 125 and 200 mgg⁻¹ of the adsorbents by the Langmuir model. The results showed that the synthesized nanocomposite exhibited a good adsorbent for cadmium metal in the aqueous solution.

中文翻译：

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壳聚糖/聚乙烯醇/改性FDU-12纳米复合材料合成水中镉吸附因子的研究

壳聚糖（CTS）和聚乙烯醇（PVA）是两种环保聚合物。本研究合成了甲基丙烯酸酯改性的FDU-12（FDU-12-NH _{2 ）纳米粒子。}用于制备CTS/PVA/FDU-12-NH ₂ (2%、5% w)复合材料。应用傅里叶转移红外光谱、氮气吸附/解吸和透射电子显微镜技术来表征复合材料的特性。然后，所生产的复合材料用作吸附剂以去除水溶液中的镉（II）。获得了Cd(II)吸附因子的最佳条件。应用不同的等温线和动力学模型来获得平衡吸附信息。结果表明Freundlich等温线是最好的等温线模型。此外，动力学模型遵循伪二级动力学模型。根据Langmuir模型发现吸附剂的最大吸附容量为125和200 mgg ^{-1 。}结果表明，合成的纳米复合材料对水溶液中的镉金属表现出良好的吸附剂。