Document Type : Original Article
Authors
- Sohrab Golmohammadi 1
- Abdol Azim Alinejad 2
- Afshin Ghaderpoury 3
- Nezam Mirzaei 4
- Mohammad Hossien Saghi 2
- Mansour Ghaderpoori 5
1 MSc. and Student research Committee, Department of Environmental engineering, Kurdistan rural water & wastewater company, Sanandaj, Iran.
2 PhD Candidate, Department of Environmental Health Engineering, School of Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
3 MSc. Student, Department of Environmental Health Engineering, School of Health, Shahid Beheshti 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 Nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran.
Abstract
Background Wastewater from textile dyes, which contain organic pollutants, is a major source of environmental contamination. This study aimed to determine the efficiency of the photo-catalytic process of ZnO nanoparticles in removing Acid Black 1 from aqueous solutions.
Methods & Materials This study was quasi-experimental. The nanoparticles were synthesized in the laboratory. To determine their characteristics some tests, including SEM, XRD and particle size distribution were done. The optimum pH was determined in the test, then, by maintaining the optimum pH, hydrogen peroxide concentration, dye concentration and different concentrations of nanoparticles were studied.
Results The results showed that the removal efficiency of this process is maximum at pH=4 and equals to 1.15%. The best color removal efficiency was obtained at a concentration of 5 mg/l. The maximum and minimum removal efficiency as a color block acid were obtained at a concentration of 30 and 5 Mmol/mL of hydrogen peroxide, respectively.
Conclusion Nano-photo catalytic process is a highly efficient method for the removal of dyes in aqueous solutions. 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
Keywords
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