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Electro Fenton Process Catalyzed by Fe@Fe2o3 Nanowire for Degradation of Carbamazepine From Aqueous Solutions Publisher



Amin MM1, 2 ; Yousefinejad S3 ; Dehghani M4 ; Rahimi S2, 5
Authors
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Authors Affiliations
  1. 1. Environment Research Center, Research Institute for Primordial Prevention of Non-communicable disease, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, North Bahonar Street, 8 Alley, Shiraz, Iran
  3. 3. Research Center for Health Sciences, Institute of Health, Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
  4. 4. Research Center for Health Sciences, Institute of Health, Department of Environmental Health, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
  5. 5. School of Health, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Desalination and Water Treatment Published:2019


Abstract

In this study, Fe@Fe2O3 nanowires were applied in combination with electro Fenton (EF) process to decompose of carbamazepine (CBZ) drug in an electrochemical reactor using a graphite rod cathode and Ti/PbO2 anode. Response surface methodology (RSM) based on central composite design was used to optimize various parameters such as pH, current, FeSO4·7H2O, drug and Fe@Fe2O3 concentrations, and reaction time. The results of RSM showed a good statistical relationship between experimental values of CBZ removal and their predicted values using the suggested multi-parameter model. The efficacy of CBZ removal significantly enhanced with increasing density, Fe@Fe2O3 nanowire dose, and reaction time, while it was reduced with increasing pH, FeSO4·7H2O concentration, and initial concentration of the drug. The results on a percentage of contribution and the F-value (PC% = 42.99 and F = 346.4003) showed that Fe@Fe2O3 dose plays an important role in increasing the efficiency of the electro Fenton process. RSM results also revealed that EF process effectively removed 88.55% of CBZ and 65% of total organic carbon from aqueous solutions under optimum conditions; that is pH = 4, current = 0.18 A (current density = 5.14 mA cm-2), FeSO4·7H2O concentration = 3.87 mg L-1, CBZ concentration = 7.49 mg L-1, Fe@Fe2O3 dose = 1,050 mg L-1, and reaction time = 50 min. The utilized multi-parameter optimization approach revealed the presence of interactions between pH with FeSO4·7H2O concentration and pH with reaction time. As a conclusion EF process catalyzed by Fe@Fe2O3 nanowire can be used for the removal of pharmaceutical compounds such as CBZ from aqueous solutions. © 2019 Desalination Publications.
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