Shawket Abliz, Abdiryim Supahun, Wang Ji-De, Ismayil Nurulla
College of Chemistry and Engineering, Xinjiang University, Urumqi 830046, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Jun;31(6):1702-6.
With lead ion template, acrylic acid as functional monomer, potassium persulfate as initiator, strytrene as framework monomer, lead ion imprinted polymers (Pb(II)-IIPs) were prepared using free emulsion polymerization method. The structure and morphology of the polymers were analyzed by UV-spectra, FTIR and scanning electron microscopy. The adsorption/ desorption and selectivity for Pb2+ were investigated by flame atomic absorption spectrometry (FAAS) as the detection means. The results show that compared with non-imprinted polymers(NIPs), the Pb(II)-IIPs had higher specific adsorption properties and selective recognition ability for Pb(II). The relative selectivity coefficient of Pb(II)-IIPs for Pb(II) was 6.25, 6.18, 6.25 and 6.38 in the presence of Cd(II), Cu(II), Mn(II) and Zn(II) interferences, respectively. The absorption rate was the best at the pH of adsorbent solution of 6, Adsorption rate reached 96% during the 2.5 h static adsorption time. Using 3.0 mol x L(-1) HCI as the best desorption solvent to desorb the adsorbents, the desorbtion rate reached 98%. Under the best adsorption conditions, the adsorption capacity of Pb(II)-IIPs for Pb(II) was found to be 40. mg x g(-1).
以铅离子为模板，丙烯酸为功能单体，过硫酸钾为引发剂，苯乙烯为骨架单体，采用自由乳液聚合法制备了铅离子印迹聚合物（Pb(II)-IIPs）。通过紫外光谱、傅里叶变换红外光谱和扫描电子显微镜对聚合物的结构和形貌进行了分析。以火焰原子吸收光谱法（FAAS）为检测手段，研究了其对Pb2+的吸附/解吸性能和选择性。结果表明，与非印迹聚合物（NIPs）相比，Pb(II)-IIPs对Pb(II)具有更高的特异性吸附性能和选择性识别能力。在Cd(II)、Cu(II)、Mn(II)和Zn(II)干扰存在下，Pb(II)-IIPs对Pb(II)的相对选择性系数分别为6.25、6.18、6.25和6.38。吸附剂溶液pH为6时吸附率最佳，静态吸附2.5 h时吸附率达到96%。以3.0 mol·L(-1) HCl作为最佳解吸溶剂对吸附剂进行解吸，解吸率达到98%。在最佳吸附条件下，Pb(II)-IIPs对Pb(II)的吸附容量为40 mg·g(-1)。
