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The Evaluation of the Application Efficiency of Potassium Ferrate for Advanced Treatment of Municipal Wastewater



Bandpei AM1 ; Fakhri Y2 ; Khodadadi R3 ; Mohammadi H4 ; Mirzaei N5, 6 ; Alinejad AA2 ; Bahmani Z7
Authors
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Authors Affiliations
  1. 1. Environmental and Occupational Hazards Control Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  2. 2. Department of Environmental Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  3. 3. Social Determinants in Health Promotion Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
  4. 4. Department of Epidemiology and Biostatistics, Isfahan University of Medical Sciences, Isfahan, Iran
  5. 5. Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran
  6. 6. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  7. 7. Environmental Health Engineering, Iran University of Medical Sciences, Tehran, Iran

Source: International Journal of Pharmacy and Technology Published:2015

Abstract

Iron (VI) and iron (V), known as ferrates, are powerful oxidants and their reactions with pollutants are typically fast with the formation of non-toxic by-products. The use of potassium ferrate (VI) as an alternative wastewater remediation chemical has been studied and is reported in this paper. Ferrate ion as a strong oxidant has the highest oxidation potential among all oxidants and disinfectants in water and wastewater treatment. Ferrate (VI) Ions are reduced to Fe (III) ions or hydroxide ferric in water, which can simultaneously serve as a coagulant and oxidant or a disinfectant in a versatile process. The aim of this study was to determine the effectiveness of potassium ferrate use for advanced treatment of sewage. This quasi-experimental study was conducted in laboratory scale. An advanced Wastewater treatment was studied by potassium ferrate on effluent wastewater through determining the effect of pH and concentration on the removal of turbidity, the chemical oxygen Demand (COD) and phosphorus. In order to determine the efficiency of disinfection of ferrate, the effect of three variables, contact times, ferrate concentrations, and pH on disinfection Processes was determined by the most probably number (MPN) index. The results showed that the best condition for COD removal efficiency and the removal of turbidity was 65% and 90% using potassium ferrate with pH=5 and optimum concentration of 10 mg/L. pH and concentration of potassium ferrate for optimum performance of phosphorus removal was 5 and 12 mg/L, which caused phosphorus removal 72%. The optimum condition for potassium ferrate applied as disinfectant was in 4 mg/l concentration, Contact time of 25minute, and pH=6 Potassium ferrate can be used as an effective oxidant, disinfectant and coagulant Chemical for treating a variety of municipal and industrial wastewaters. It will allow access to multiple targets in a process. © 2015, International Journal of Pharmacy and Technology. All rights Reserved.
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