离子交换树脂D001对罗丹明B的吸附特性

采用强酸性阳离子交换树脂D001作为吸附剂吸附脱除水溶液中的罗丹明B(Rh B)。SEM和FTIR表征结果显示:D001树脂表面存在孔隙,可增加树脂的比表面积;树脂表面的磺酸基团可通过与阳离子染料Rh B络合而将其吸附。实验结果表明:Langmuir等温吸附模型能更好地描述树脂对Rh B的吸附规律,升高温度有利于树脂吸附Rh B;吸附过程符合Lagergren准一级动力学方程,初始Rh B质量浓度为20 mg/L时吸附活化能为7.06 k J/mol;树脂对Rh B的吸附是一个自发的、吸热的、熵推动的过程;颗粒扩散为吸附过程的控制步骤;树脂具有良好的重复使用性能。

Adsorption capability of ion exchange resin D001 to Rhodamine B

Strong-acid cation exchange resin D001 was used as adsorbent for removal of Rhodamine B（RhB）from aqueous solution. The characterization results by SEM and FTIR showed that：The pores structure on the resin surface contribute to increase the specific surface area of the resin;Sulfonic acid groups on the resin surface could adsorb RhB by complexing with the cation dye. The experimental results showed that：The adsorption isotherm of the resin followed Langmuir model better,the increase of temperature favored adsorption reaction;The adsorption kinetics followed the pseudo-first order equation,the adsorption activation energy was 7.06 kJ/mol when the initial mass concentration of RhB was 20 mg/L;The adsorption process was a spontaneous,endothermic and entropy driving reaction;The rate-determining step was particle diffusion;The resin had good reusability.