School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
J Environ Sci (China). 2009;21(12):1722-9. doi: 10.1016/s1001-0742(08)62479-1.
Surface ion-imprinted in combination with sol-gel process was applied to synthesis a new Pb(II)-imprinted polymer for selective separation and enrichment of trace PbO(II) from aqueous solution. The prepared material was characterized by using the infrared spectra, X-ray diffractometer, and scanning electron microscopy. The batch experiments were conducted to study the optimal adsorption condition of adsorption trace Pb(II) from aqueous solutions on Pb(II)-imprinted polymer. The equilibrium was achieved in approximately 4.0 h, and the experimental kinetic data were fitted the pseudo second-order model better. The maximum adsorption capacity was 22.7 mg/g, and the Langmuir equation fitted the adsorption isotherm data. The results of selectivity experiment showed that selectively adsorbed rate of Pb(II) on Pb(II)-imprinted polymer was higher than all other studied ions. Desorption conditions of the adsorbed Pb(II) from the Pb(II)-imprinted polymer were also studied in batch experiments. The prepared Pb(II)-imprinted polymer was shown to be promising for the separation and enrichment of trace Pb(II) from water samples. The adsorption and desorption mechanisms were proposed.
表面离子印迹与溶胶-凝胶法相结合，用于合成一种新的 Pb(II)印迹聚合物，以从水溶液中选择性分离和富集痕量 PbO(II)。采用红外光谱、X 射线衍射仪和扫描电子显微镜对制备的材料进行了表征。通过批实验研究了从水溶液中吸附痕量 Pb(II)到 Pb(II)印迹聚合物上的最佳吸附条件。吸附平衡约在 4.0 h 内达到，实验动力学数据更符合准二级模型。最大吸附容量为 22.7 mg/g，Langmuir 方程拟合了吸附等温线数据。选择性实验结果表明，Pb(II)在 Pb(II)印迹聚合物上的选择性吸附率高于所有其他研究离子。还在批实验中研究了从 Pb(II)印迹聚合物上解吸吸附 Pb(II)的条件。所制备的 Pb(II)印迹聚合物有望用于从水样中分离和富集痕量 Pb(II)。提出了吸附和解吸机理。
