In this study, ZnO/SnO₂ nanocomposites were fabricated via a green and simple route using pine tree leaves for the first time. No expensive reagent or hazardous solvent was used for synthesis of nanocomposites and only natural and eco-friendly materials were utilized. ZnO/SnO₂ nanocomposites were characterized by XRD, TEM, SEM and EDS. The adsorption performance of ZnO/SnO₂ nanocomposites was studied for the efficient removal of Cu²⁺, Pb²⁺ and Zn²⁺ metal ions. To achieve maximum adsorption capacity of metal ions, the influences of several operating conditions including pH value, ZnO/SnO₂ nanocomposites dosage, initial concentration of metal ions and contact time were investigated. Also, equilibrium and kinetics models of metal ions to nanocomposites were studied. Adsorption process could be well defined by the Langmuir isotherm with R² of 0.88, 0.94 and 0.94 for removal of Cu²⁺, Pb²⁺ and Zn²⁺ ions; respectively. The kinetic data fitted the pseudo-second-order model with the R² value of 0.99, 1 and 0.99 for removal of Cu²⁺, Pb²⁺ and Zn²⁺ ions; respectively.

在这项研究中，ZnO / SnO ₂纳米复合材料首次通过绿色和简单的路线使用松树树叶制成。没有使用昂贵的试剂或有害溶剂来合成纳米复合材料，仅使用了天然和环保材料。用XRD，TEM，SEM和EDS对ZnO / SnO ₂纳米复合材料进行了表征。研究了ZnO / SnO ₂纳米复合材料对Cu 2 ⁺，Pb ²⁺和Zn ²⁺金属离子的有效吸附性能。为了获得最大的金属离子吸附能力，pH值，ZnO / SnO ₂等几个操作条件的影响研究了纳米复合材料的用量，金属离子的初始浓度和接触时间。此外，还研究了金属离子与纳米复合材料的平衡和动力学模型。Langmuir等温线可以很好地定义吸附过程，R ^2分别为0.88、0.94和0.94，用于去除Cu 2 ⁺，Pb ²⁺和Zn ²⁺离子。分别。动力学数据拟合了伪二级模型，其R ²值为0.99、1和0.99，用于去除Cu 2 ⁺，Pb ²⁺和Zn ²⁺离子。分别。