以氯甲基化聚苯乙烯树脂微球为原料,经胺化、接酯反应,合成了侧链上含有硫脲功能基的新型螯合树脂,研究了该树脂对Au(III)的吸附性能.结果表明,树脂对Au(III) 吸附容量为1.84 mmol·g~(-1),吸附过程符合G.E.Boyd液膜扩散方程,液膜扩散为吸附主控步骤;等温吸附可由Langmuir模型描述,为单分子层吸附.
A new thiourea chelating resin was prepared through the processes of aminition and grafting reactions on the material polystyrene microsphere. The adsorption performance for Au(Ⅲ)was studied. The adsorption capacity of resin for Au(Ⅲ)reached 1.84 mmol·g~(-1). G.E.Boyd Equation adequately fit the sorption rate data before equilibrium. The results confirmed the film diffusion controlled mechanism of the sorption process. The equilibrium sorption data can be described by the Langmuir isotherm equation, which implies the monomolecular sorption in these systems.
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