In this research, poly (vinyl alcohol)/polyethyleneimine/Fe₃O₄ (PVA/PEI/Fe₃O₄) microfibers nanocomposite was synthesized in order to remove and/or preconcentrate Pb(II) ions. The microfibers nanocomposite was characterized by FT-IR, SEM, and XRD methods. The effects of various parameters such as pH, amount of adsorbent, and contact time on the adsorption efficiency of Pb(II) ions at the adsorbent were fully investigated and the optimum conditions were established. The adsorption capacity was found to be 370.9 mg g^− 1 of the adsorbent. The kinetics of metal ions adsorption was evaluated using pseudo-first-order and pseudo-second-order models. The results showed that the adsorption of the investigated metal ion is in agreement with the pseudo first-order kinetics. The adsorption–desorption process was conducted for five cycles and the removal efficiency still kept 97% after three cycles.

在这项研究中，合成了聚乙烯醇/聚乙烯亚胺/ Fe ₃ O ₄（PVA / PEI / Fe ₃ O ₄）超细纤维纳米复合材料，以去除和/或预浓缩Pb（II）离子。通过FT-IR，SEM和XRD方法对微纤维纳米复合材料进行了表征。充分研究了pH，吸附剂数量和接触时间等参数对Pb（II）离子在吸附剂上吸附效率的影响，并确定了最佳条件。吸附容量为370.9 mg g ^{− 1}的吸附剂。使用伪一级模型和伪二级模型评估了金属离子吸附的动力学。结果表明，所研究的金属离子的吸附与拟一级动力学一致。吸附-解吸过程进行了五个循环，三个循环后去除率仍保持97％。