含硫脲树脂的制备及吸附Au(Ⅲ)性能的研究

Experimental Analysis on the Adsorption of Au(Ⅲ) Ions by Polythiourea

以硫脲和甲醛为原料制备硫脲-甲醛螯合树脂,并用傅里叶红外变换光谱(FT-IR)、热重、扫描电镜等进行了表征。采用静态吸附的方法吸附溶液中的Au(Ⅲ),考察了初始质量浓度、接触时间、温度、离子强度等因素对其吸附的影响。此外,对硫脲-甲醛螯合树脂的吸附选择性进行了研究。对吸附过程进行了准一级、准二级动力学模型拟合。

The thiourea-formaldehyde chelating resin was prepared from thiourea and formaldehyde.The chelating resin was characterized by FT-IR,SEM and TGA.The effects of temperature,contact time,initial mass concentration and ionic strength on the adsorption properties to Au(Ⅲ)of chelating resin were discussed.In addition,the selectivity of thiourea-formaldehyde chelating resin was studied.Finally,the pseudo-first-order equation and pseudo-second-order equation were used to fit the adsorption kinetics data.