Nickel (ii) removal from industrial plating effluent by fenton process
1 Environmental Health Engineering Research Center and Department of Environmental Health, School of Public Health, Kerman University of Medical Sciences, Kerman, Iran
2 Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
3 Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
4 School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA
5 Social Development & Health Promotion Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
2 Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
3 Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
4 School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA, USA
5 Social Development & Health Promotion Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
Abstract
In this study, the efficiency of Fenton s process to remove nickel (II) from industrial plating effluent was investigated. The effect of pH, contact time, concentrations of Fe2+ and H2O2 were surveyed. Kinetic experiments were performed in order to predict the nickel (II) removal rate from wastewater. At pH 1 to 4, nickel (II) removal efficiency increased and declined at pH > 4. The maximum nickel (II) removal efficiency was 98% at 60 min contact time, pH: 4, and Fe2+ and H2O2 concentrations of 1,600 and 2,500 mg/L. First-order kinetic describes nickel (II) removal better than zero- or second-order kinetic models. The results show that Fenton s process is effective in removing nickel (II) from industrial plating effluent below the EPA discharge limit.
Keywords
advanced treatment; heavy metal; plating effluent; reaction rate