Abstarct: Industrial wastewaters contain hazardous materials such as synthetic dyes and heavy mextals. The effluent discharged into natural water bodies cause hazardous effects on natural and human ecosystem. Different methods must be developed for purification of wastewater from pollutant. Among these methods, adsorption is a well-known and good technique for removal of pollutants because of its easy operation, insensitivity to toxic or harmful substances and the possibility of reusing the exhausted adsorbent through regeneration. In this thesis, natural nano-zeolite and modified nano-zeolite using N-(2-aminoethyl)-3-(trimethoxysilyl)propylamine Silane used as an adsorbent for adsorption of copper, Basic Blue 41, Methylene Blue, Direct red 23 and Direct Red 80. The effect of several parameters such as adsorbent dosage, initial pollutant concentration, salt addition and pH was studied. The scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) were used to characterize adsorbent. Equilibrium isotherms were analyzed by Langmuir, Freundlich and Tempkin adsorption models. For adsorption kinetic review, the pseudo-first-order pseudo-second-order kinetics and intraparticle diffusion model were studied. The amount of the adsorption capacity of modified nano-zeolite was 2500 and 3333.34 mg/g for DR23 and DR80, respectively. The results indicate that the modified nano-zeolite can be used as a suitable adsorbent for purification of contaminated water.