Magnetite nanoparticles (Fe₃O₄) and their kaolinite and SBA-15 (MFSBA-15) composites were fabricated and evaluated their adsorption capability of heavy-metal ions Pb(II) and Co(III) from aqueous solution. The morphology, phase structure, and composition of nanocomposites are investigated for scanning electron microscope (SEM), X-ray diffraction (XRD), VSM, TGA, and Fourier-transform infrared (FT-IR) spectroscopy. With a particle size of 100–250 nm, the material surface was heterogeneous. This study highlighted several parameters affecting the metal ion adsorption, such as initial concentrations, adsorbent dose, pH, and contact time. At optimum pH 6, 8, and 10 for Pb(II), and Co(III) ions, balance and kinetic experiments were conducted at 29 °C. The model predictions were adequately following the experimental results, and the MFSBA-15 nanocomposites were successfully used to isolate heavy metals from aqueous solutions. The maximum adsorption efficiency for MFSBA-15 material for Pb(II) and Co(III) was 248.213 and 109.254 mg/g, respectively. For regenerative studies, the composite was used. The analysis indicated that it was possible to reuse the adsorption of heavy metals from aqueous solutions over seven cycles without any adsorption capacity modification.

磁铁矿纳米颗粒（Fe ₃ O ₄）及其高岭石和SBA-15（MFSBA-15）复合材料的制备，并评估了它们对水溶液中重金属离子Pb（II）和Co（III）的吸附能力。研究了纳米复合材料的形态，相结构和组成，用于扫描电子显微镜（SEM），X射线衍射（XRD），VSM，TGA和傅立叶变换红外（FT-IR）光谱。粒径为100–250 nm，材料表面是异质的。这项研究重点介绍了影响金属离子吸附的几个参数，例如初始浓度，吸附剂剂量，pH和接触时间。在Pb（II）和Co（III）离子的最佳pH为6、8和10的情况下，在29°C下进行了平衡和动力学实验。模型的预测与实验结果相符，MFSBA-15纳米复合材料已成功用于从水溶液中分离重金属。MFSBA-15材料对Pb（II）和Co（III）的最大吸附效率分别为248.213和109.254 mg / g。为了进行再生研究，使用了复合材料。分析表明，在不改变吸附容量的情况下，有可能在七个循环中重复使用来自水溶液的重金属吸附。