Removal of blue cat 41 dye from aqueous solutions with ZnOudnanoparticles in combination with US and US-H2O2 advancedudoxidation processes

摘要

Background: The purpose of the present study was to assess the efficiency of ultrasound/hydrogenudperoxide processes and ultrasound/hydrogen peroxide/ZnO nanoparticles in the removal of blue cat 41uddye from aqueous solutions.udMethods: ZnO nanoparticles were prepared using the hydrothermal method. Variables including pH,udconcentration of ZnO nanoparticles, initial dye concentration, concentration of hydrogen peroxide, andudcontact time were investigated.udResults: H2O2 alone is not effective in dye removal. In conditions of H2O2 = 20 mg/L and US = 30 kHz,udremoval efficiency rates of 6.5%, 23.5%, 30%, 51.8%, and 55%, respectively, were obtained. The maximumudremoval efficiency rate was obtained at the nanoparticle concentration of 3 g/l. Also, removal efficiencyudwas reduced when the initial dye concentration was increased.udConclusion: The combination of nanoparticles and US and H2O2 is very effective in removing blue cat 41uddye. As a result, photo catalytic processes can be considered to effectively remove environmental pollutants.udKeywords: Advanced oxidation process, Ultrasonic waves, ZnO nanoparticles, Hydrothermal, Hydrogenudperoxide, DyeudCitation: Golmohammadi S, Ahmadpour M, Mohammadi A, Alinejad A, Mirzaei N, Ghaderpoori M,udGhaderpoori A. Removal of blue cat 41 dye from aqueous solutions with ZnO nanoparticles in combinationudwith US and US-H2O2 advanced oxidation processes. Environmental Health Engineering and ManagementudJournal 2016; 3(2): 107–113. doi: 10.15171/ehemj.2016.08.