Nanostructured iron–zirconium oxides (NIZOs), with Fe-to-Zr molar ratio of 1:1 and 1:2, have been found to show high adsorption efficiency toward Pb²⁺ from aqueous solution. The NIZO was synthesized by the co-precipitation method and characterized in terms of XRD, TEM, SEM–EDX, BET surface area analysis, TGA, FT-IR spectroscopy and zeta potential measurement. The data of adsorption of Pb²⁺ on the NIZO, under optimized condition of pH, Pb²⁺ concentration, adsorbent amount, time and temperature, were fitted in Langmuir, Freundlich and Temkin adsorption model, and the data showed the best agreement with Langmuir model with R² = 0.990 and 0.994 for Fe/Zr molar ratio = 1:1 and 1:2, respectively. The thermodynamic studies showed that the adsorption of Pb²⁺ on the NIZO proceeds spontaneously and exothermically through the involvement of weak van der Waals forces. Further, the adsorption of Pb²⁺ on the NIZO was found to follow pseudo-second-order kinetics.

Fe / Zr摩尔比分别为1：1和1：2的纳米结构的铁-锆氧化物（NIZO）已显示出对水溶液中Pb ^2+的高吸附效率。NIZO是通过共沉淀法合成的，并通过XRD，TEM，SEM-EDX，BET表面积分析，TGA，FT-IR光谱和zeta电位测量进行了表征。在Langmuir，Freundlich和Temkin吸附模型中，在优化的pH，Pb ²⁺浓度，吸附剂量，时间和温度条件下，对NIZO上Pb ²⁺的吸附数据进行拟合，数据显示与Langmuir最佳吻合。模型- [R ² Fe / Zr摩尔比分别为1：1和1：2时= 0.990和0.994。热力学研究表明，通过弱范德华力的参与，NIZO上Pb ²⁺的吸附自发地，放热地进行。此外，发现NIZO上Pb ²⁺的吸附遵循伪二级动力学。