October & November 2016. Vol 23. Num 4 680 J ournal of Sabzevar U niversity of Medical Sciences * Corresponding Author: Mansour Ghaderpoori, PhD Address: Department of Environmental Health, School of Health and Nutriion, Lorestan University of Medical Sciences, Khorramabad, Iran. Tel: +98 (66) 33409971 E-mail: mghaderpoori@gmail.com Research Paper Photo Catalyic E iciency of Hydrothermal Synthesized Zinc Oxide Nanoparicles for Removal of Acid Black 1 From Aqueous Soluions 1. MSc. Student, Research Commitee, Department of Environmental Engineering, Kurdistan Rural Water & Wastewater Company, Sanandaj, Iran. 2. PhD Candidate, Department of Environmental Health Engineering, School of Health, Shahid Beheshi University of Medical Sciences, Tehran, Iran. 3. MSc. Student, Research Commitee, Department of Environmental Health Engineering, School of Health, Shahid Beheshi University of Medical Science, Tehran, Iran. 4. Assistant Professor, Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran. 5. Assistant Professor, Department of Environmental Health Engineering, School of Health and Nutriion, Lorestan University of Medical Sciences, Khorramabad, Iran. Sohrab Golmohammadi 1 , Abdol Azim Alinejad 2 , Afshin Ghaderpoury 3 , Nezam Mirzaei 4 , Mohammad Hossien Saghi 2 , *Mansour Ghaderpoori 5 Backgrounds Wastewater from texile dyes, which contain organic pollutants, is a major source of envi- ronmental contaminaion. This study aimed to determine the eiciency of the photo-catalyic process of ZnO nanoparicles in removing Acid Black 1 from aqueous soluions. Methods & Materials This study was quasi-experimental. The nanoparicles were synthesized in the labo- ratory. To determine their characterisics some tests, including SEM, XRD and paricle size distribuion were done. The opimum pH was determined in the test, then, by maintaining the opimum pH, hydrogen peroxide concentraion, dye concentraion and diferent concentraions of nanoparicles were studied. Results The results showed that the removal eiciency of this process is maximum at pH=4 and equals to 1.15%. The best color removal eiciency was obtained at a concentraion of 5 mg/l. The maximum and minimum removal eiciency as a color block acid were obtained at a concentraion of 30 and 5 Mmol/ mL of hydrogen peroxide, respecively. Conclusion Nano-photo catalyic process is a highly eicient method for the removal of dyes in aqueous soluions. In this process, organic materials are converted into less toxic substances also the energy of sunlight, which is used in this process is normally available. A B S T R A C T Keywords: Acid black 1, Photo catalyst, E luent Received: 19 Apr. 2016 Accepted: 11 Jul. 2016 Citation: Golmohammadi S, Alinejad AA, Ghaderpoury A, Mirzaei N, Saghi MH, Ghaderpoori M. [Photo Catalytic Eiciency of Hydrothermal Synthesized Zinc Oxide Nanoparticles for Removal of Acid Black 1 From Aqueous Solutions (Persian)]. Journal of Sabzevar University of Medical Sciences. 2016; 23(4):680-687. :