2-Aminothiazole Functionalized Polystyrene for Selective Removal of Au(III) in Aqueous Solutions

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• 作者：Chunhua Xiong ; Suguo Zhou ; Xiaozheng Liu ; Qian Jia ; Chunan Ma ; Xuming Zheng
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：February 12, 2014
• 年：2014
• 卷：53
• 期：6
• 页码：2441-2448
• 全文大小：389K
• ISSN：1520-5045

文摘

A new chelating resin, polystyrene-2-aminothiazole (PS-AT), was synthesized via one-step reaction by grafting 2-aminothiazole in a chloromethylated polystyrene polymer. Its structure was characterized by elemental analysis and infrared spectroscopy. Batch experiments were applied to investigate the adsorption properties of PS-AT for Au(III) ions. The resin exhibits an excellent selectivity for Au(III) ions in the presence of Ni(II), Cu(II), Cd(II), and Co(II) ions. The maximum adsorption capacity obtained at 308 K was 733.8 mg/g. The adsorption kinetic and equilibrium data were well fitted to the pseudo-second-order model and the Langmuir isotherm model, respectively. Desorption of gold from the resin can be achieved using 60 mL of 2 mol/L HCl-10% thiourea solution with a desorption ratio of 93.8%. The XPS data, along with IR spectra, revealed that gold was adsorbed on the surface of PS-AT in the form of chloride, and nitrogen and sulfur were involved in the chelation of gold chloride.