Abstract

The objectives of this research were to evolve a gellan gum based double network (DN) hydrogel with high mechanical properties, and investigate its potential as an adsorbent to remove Al(III) ion. The double network hydrogel was synthesized for the first time in the literature, and Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy were utilized for structural and morphological characterization. Gellan gum hydrogel was characterized in terms of mechanical strength. The Al(III) removal behaviour studies were performed in 100 ppm aqueous Al(III) solution, and the kinetic data were correlated with the models of pseudo-first order and second-order. In addition, the equilibrium adsorption data were applied to Langmuir, Freundlich and Dubinin–Radushkevich (D–R) isotherm models. Moreover, the DN hydrogel adsorption capacities were calculated for the regeneration and reuse studies. The DN hydrogel could be used at least five times without significant decreasing in its adsorption capacity. In this work, the possibility of the mechanically developed strong DN hydrogel was observed for Al(III) ion removal behaviour.

中文翻译：

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结冷胶-丙烯酸双网络水凝胶去除Al（III）离子

抽象的

这项研究的目的是开发具有高机械性能的基于吉兰糖胶的双网络（DN）水凝胶，并研究其作为吸附剂去除Al（III）离子的潜力。在文献中首次合成了双网络水凝胶，并利用傅立叶变换红外光谱和扫描电子显微镜对结构和形态进行了表征。结冷胶水凝胶以机械强度为特征。Al（III）去除行为研究是在100 ppm Al（III）水溶液中进行的，动力学数据与伪一阶和二阶模型相关。此外，将平衡吸附数据应用于Langmuir，Freundlich和Dubinin–Radushkevich（DR）等温线模型。而且，计算了DN水凝胶的吸附能力，以进行再生和再利用研究。DN水凝胶可以使用至少五次，而不会显着降低其吸附能力。在这项工作中，观察到机械开发的强DN水凝胶对于去除Al（III）离子的行为的可能性。