摘要
合成了一种L-酪氨酸修饰的螯合吸附树脂(AJS-02),并与超高交联树脂NDA-150作对比,研究了其对Cu2+的吸附和脱附行为。静态实验结果表明,在研究的浓度范围内,吸附平衡数据符合Langmuir等温吸附方程。Cu2+在AJS-02上的吸附量大于其在NDA-150上的吸附量。Cu2+在2种树脂上的吸附过程为物理和化学作用的共同结果。吸附动力学符合液膜扩散方程,液膜扩散为吸附速率的主要控制步骤。动态吸附-脱附实验表明,动态穿透吸附量和总吸附量分别为4.05×10-3和6.44×10-3mol/L,使用5%HCl进行脱附,脱附率达到90%以上。
An adsorption resin modified by L-tyrosine acid,AJS-02,was synthesized,and its adsorption-desorption performance for Cu2＋ was compared with that of NDA-150.The equilibrium adsorption data were fitted to Langmuir isotherm and the adsorption capacity for AJS-02 was higher than that of NDA-150,which may be attributed to the polar groups in the network of AJS-02.The adsorption of Cu2＋ to AJS-02 involved physisorption and chemisorption.Kinetic analysis shows that the adsorption rate was mainly governed by the film diffusion.Dynamic adsorption and desorption studies for Cu2＋to AJS-02 show that the breakthrough adsorption capacity and the total adsorption capacity were 4.05×10-3 and 6.44×10-3 moles per liliter resin,respectively.Above 90% regeneration efficiency for the adsorbent was achieved by the desorption of 5% hydrochloric acid.
出处
《应用化学》
CAS
CSCD
北大核心
2009年第12期1450-1455,共6页
Chinese Journal of Applied Chemistry
基金
安徽省教育厅自然科学研究项目(KJ2007B167)
