In the current research, Fe3O4@SiO2 nanoparticles were synthesized and functionalized with cyanuric chloride and glucosamine molecules as an effective adsorbent in removing Zn2+ ions. These nanoparticles were synthesized by using co-precipitation and Stober synthetic methods. Investigation of the structure, morphology and size of synthetic adsorbent particles were examined using X-ray diffraction (XRD), Thermogravimetric analysis (TGA), Field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopic (FT-IR), Transmission electron microscopy (TEM), Vibrating sample magnetometer (VSM) and Particle size distribution (DLS). Afterwards, adsorbent dosage, contact time and pH of the solution were optimized in order to obtain the best adsorption capacity. The maximum removal of Zn2+ was obtained with the 60 ml of solution in the presence of 20 mg of adsorbent at pH=7 (initial concentration 0.55 mmol/L) with contact time of 16 minutes. Also, the effect of pH on the adsorption rate in the range of 3-8 shows that with increasing pH, the amount of Zn2+ ions absorption increases and the maximum absorption performance was observed at pH=7. Also, the desorption of Zn2+ ions was done by using HCl solution (0.1 mmol/L), which provides the ability to recycle and reuse the adsorbent in consecutive adsorption-desorption processes (8 times) without serious reduction in adsorption activity.