en عمومى General مقاله اصیل Original Article <div style="text-align: justify;">Introduction: Heavy metal ions are very toxic to public and personal health. A special polypyrrole with environmental stability and reusability was used to remove metal ions from aqueous solution. In this work, a new polypyrrole (PPy/Sb2O3) nanosorbent was successfully synthesized in aqueous solution.<br> Methods: The purpose of this research was to investigate the adsorption properties of polypyrrole nanocomposites for the removal of Cd(II) and Zn(II) from aqueous solution. Batch various factors affecting the adsorption equilibrium were investigated in detail. Also, different models (isotherm, kinetic, and thermodynamic) were compared to describe the adsorption phenomenon.<br> Results: The adsorption isotherms for Cd(II) and Zn(II) were well fitted by the Langmuir model with a maximum monolayer capacity of 17.33 and 15.361 mg/g, respectively, for Cd (II) and Zn (II) ions. Moreover, thermodynamic analysis shows the endothermic nature and spontaneity of the adsorption process with increasing entropy in PPy-PVA/Sb2O3. From the kinetic results, it was concluded that the pseudo-second-order kinetic model is the best in describing the adsorption process for Cd (II) and Zn (II). The consistency of the experimental qe with the qe calculated from the pseudo-second-order kinetic model indicated that the adsorption of Cd(II) and Zn(II) on PPy-PVA/Sb2O3 is probably controlled by chemisorption.<br> Conclusion: This study shows that polypyrrole and its nanocomposites have a potential for use as effective adsorbents due to their ease of synthesis, low cost, and regeneration efficiency for the removal of heavy metal ions from aqueous solutions.</div> Polypyrrole, Adsorption, Nanocomposite, Isotherm, Thermodynamic 1 9 http://ehemj.com/browse.php?a_code=A-10-1-461&slc_lang=en&sid=1 Zeynab Karimi zeinabkarimii1990@gmail.com 100319475328460022631 0009-0007-4531-8038 No Department of Environmental Health Engineering, Faculty of Health, Student Research Committee, Mazandaran University of Medical Science, Sari, Iran Soheil Balsini Gavanaroudi soheilbalsinigavanaroudi@gmail.com 100319475328460022632 0009-0003-5335-3512 No Department of Chemical Engineering, Youngstown State University, Ohio, United States of America Saeid Sabzehali s.sabzehali@gmail.com 100319475328460022633 0009-0004-4243-8753 No Isfahan University of Technology, Graduate with an M.sc in Materials Science and Engineering, Isfahan, Iran Amirhossein Alidadi amir1377alidadi@gmail.com 100319475328460022634 0009-0003-1377-8241 No Bachelor of Mechanical Engineering, Faculty of Technical Engineering, Azad University, North Tehran Branch, Tehran, Iran Ali Akbar Amooey aliakbar_amooey@yahoo.com 100319475328460022635 100319475328460022635 No Department of Chemical Engineering, University of Mazandaran, Babolsar, Iran Reza Khalili khalili504@yahoo.com 100319475328460022636 100319475328460022636 Yes Correspondence to: Faculty of Engineering and Technology, University of Mazandaran, Babolsar, Iran