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Response Surface Methodology (Rsm) and Its Application for Optimization of Ammonium Ions Removal From Aqueous Solutions by Pumice As a Natural and Low Cost Adsorbent Publisher



Moradi M1 ; Fazlzadehdavil M2 ; Pirsaheb M3 ; Mansouri Y3 ; Khosravi T3 ; Sharafi K3, 4
Authors
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Authors Affiliations
  1. 1. School of Public Health, Department of Environmental Health Engineering, Iran University of Medical Sciences, Iran
  2. 2. School of Public Health, Department of Environmental Health Engineering, Ardabil University of Medical Sciences, Iran
  3. 3. School of Public Health, Research Centre for Environmental Determinacies of Health, Kermanshah University of Medical Sciences, Iran
  4. 4. School of Public Health, Department of Environmental Health Engineering, Tehran University of Medical Sciences, Iran

Source: Archives of Environmental Protection Published:2016


Abstract

This research was conducted to study the adsorption of ammonium ions onto pumice as a natural and low-cost adsorbent. The physico-chemical properties of the pumice granular were characterized by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Modeling and optimization of a NH4+ sorption process was accomplished by varying four independent parameters (pumice dosage, initial ammonium ion concentration, mixing rate and contact time) using a central composite design (CCD) under response surface methodology (RSM). The optimum conditions for maximum removal of NH4+ (70.3%) were found to be 100 g, 20 mg/l, 300 rpm and 180 min, for pumice dosage, initial NH4+ ion concentration, mixing rate and contact time. It was found that the NH4+ adsorption on the pumice granular was dependent on adsorbent dosage and initial ammonium ion concentration. NH4+ was increased due to decrease the initial concentration of NH4 and increase the contact time, mixing rate and amount of adsorbent. © 2016 Archives of Environmental Protection.
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