In this study one-pot synthesis of zinc-aluminum mixed oxide/polyvinyl alcohol (ZnAl mixed oxide/PVA) nanocomposite and its adsorption behavior for efficient removal of lead (II) ions from aqueous solution were investigated. The synthesized nanocomposite was characterized by X-ray diffraction (XDR), Scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and Ultraviolet-visible spectroscopes (UV-Vis) to study structural, optical properties, morphology and elemental composition. Two characteristic reflections of ZnO and Zn₆Al₂O₉ phases were shown by the XRD pattern of the nanocomposite. Due to PVA strongly caped the particles, the subsequent growth of the nanoparticle was prevented and estimated as 10.5 and 7.8 nm for ZnO and Zn₆Al₂O₉ crystallites, respectively. The concentration of Pb(II) in a solution was investigated by Inductively coupled plasma - optical emission spectrometry (ICP-OES). The optimum pH for the uptake of Pb(II) on ZnAl mixed oxide/PVA was 5.0. The removal efficiency of Pb(II) reached up to ∼97% after 180 min when 0.03 g ZnAl mixed oxide/PVA was added in 10 mL Pb(II) solutions which the concentration was 331.4 mg/L (10-3 M) at the condition of neutral pH and 298 K. Pseudo-second-order kinetic model and Freundlich isotherm were found to be the most suitable models to define the adsorption mechanism in this process. Thermodynamic parameters like ΔH°, ΔS°, ΔG° and Ea of the adsorption of Pb(II) ions onto ZnAl mixed oxide/PVA are estimated -72.98, −0.222, −6.737 and 25.956 kJ/mol at the condition of neutral pH and 298 K. After 9 cycles the % removal of Pb(II) ions reduced to 63.177%.

在这项研究中，研究了一锅法合成锌铝混合氧化物/聚乙烯醇（ZnAl混合氧化物/ PVA）纳米复合材料及其对从水溶液中有效去除铅离子的吸附性能。通过X射线衍射（XDR），扫描电子显微镜（SEM），傅立叶变换红外光谱（FTIR）和紫外可见光谱仪（UV-Vis）对合成的纳米复合材料进行表征，以研究其结构，光学性质，形态和元素组成。纳米复合材料的XRD图谱显示了ZnO和Zn ₆ Al ₂ O ₉相的两个特征反射。由于PVA牢固地覆盖了颗粒，因此阻止了纳米颗粒的后续生长，并且对于ZnO和Zn _6而言估计为10.5和7.8 nm铝₂ O ₉微晶分别。通过电感耦合等离子体发射光谱法（ICP-OES）研究了溶液中Pb（II）的浓度。在ZnAl混合氧化物/ PVA上吸收Pb（II）的最佳pH为5.0。当在10 mL浓度为331.4 mg / L（10-3 M）的Pb（II）溶液中添加0.03 g ZnAl混合氧化物/ PVA时，在180分钟后，Pb（II）的去除率达到〜97％。在中性pH和298 K的条件下。伪二级动力学模型和Freundlich等温线是确定此过程中吸附机理的最合适模型。在中性pH和298K。