fa عمومى General مقاله اصیل Original Article <p dir="ltr">Background: The purpose of the present study was to assess the efficiency of ultrasound/hydrogen peroxide processes and ultrasound/hydrogen peroxide/ZnO nanoparticles in the removal of blue cat 41 dye from aqueous solutions.<br> Methods: ZnO nanoparticles were prepared using the hydrothermal method. Variables including pH, concentration of ZnO nanoparticles, initial dye concentration, concentration of hydrogen peroxide, and contact time were investigated.<br> Results: H2O2 alone is not effective in dye removal. In conditions of H2O2 = 20 mg/L and US = 30 kHz, removal efficiency rates of 6.5%, 23.5%, 30%, 51.8%, and 55%, respectively, were obtained. The maximum removal efficiency rate was obtained at the nanoparticle concentration of 3 g/l. Also, removal efficiency was reduced when the initial dye concentration was increased.<br> Conclusion: The combination of nanoparticles and US and H2O2 is very effective in removing blue cat 41 dye. As a result, photo catalytic processes can be considered to effectively remove environmental pollutants.</p> Advanced oxidation process, Ultrasonic waves, ZnO nanoparticles, Hydrothermal, Hydrogen peroxide, Dye 107 113 http://ehemj.com/browse.php?a_code=A-10-1-57&slc_lang=fa&sid=1 Sohrab Golmohammadi sohrab2282@gmail.com 10031947532846002461 10031947532846002461 No Environmental Engineering (Trends Water and Wastewater), Kurdistan Rural Water & Wastewater CO (Kamyaran), Sanandaj, Iran Mohammad Ahmadpour moahmadpour@yahoo.com 10031947532846002462 10031947532846002462 No Department of Environmental Health Engineering, School of Public Health, Maragheh University of Medical Science, Maragheh, Iran Aliakbar Mohammadi mohammadi.eng73@gmail.com 10031947532846002463 10031947532846002463 No Department of Environmental Health Engineering, School of Public Health, Neyshabur University of Medical Sciences, Neyshabur, Iran Azim Alinejad 10031947532846002464 10031947532846002464 No Social Determinants in Health Promotion Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran Nezam Mirzaei azimalinejad@gmail.com 10031947532846002465 10031947532846002465 No Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran Mansour Ghaderpoori mghaderpoori@gmail.com 10031947532846002466 10031947532846002466 Yes Students Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran Afshin Ghaderpoori mghaderpoori@sbmu.ac.ir 10031947532846002467 10031947532846002467 No Department of Environmental Health Engineering, Shahid Beheshti University of Medical Sciences, Tehran, Iran