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Fluoride Removal From Aqueous Solutions by Zinc Oxide Nanoparticles



Mahvi AH1, 2 ; Rahdar A3 ; Igwegbe CA4 ; Rahdar S5 ; Ahmadi S5
Authors
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Authors Affiliations
  1. 1. Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Physics, University of Zabol, Zabol, Iran
  4. 4. Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Nigeria
  5. 5. Department of Environmental Health, Zabol University of Medical Sciences, Zabol, Iran

Source: Fluoride Published:2020

Abstract

High concentrations of fluoride ion (F) above the optimum level can lead to dental, skeletal, and non-skeletal fluorosis. The data presents a method for F removal from F-containing wastewaters. Zinc oxide nanoparticles (ZnO NPs) were applied as an adsorbent to remove F ions from aqueous solutions. The structural properties of the ZnO NPs were analyzed using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) techniques. A batch adsorption experiment was conducted to consider the influence of different parameters such as pH (2–10), contact time (20–100 min), initial F concentration (15–40 mg/L), and ZnO NPs dosage (0.02–0.09 g/L). Adsorption kinetic and isotherm data were also calculated. Optimum conditions of pH 6, adsorbent dose: 0.09 g/L, time: 60 min, and initial F concentration: 20 mg/L were obtained at 97.5% efficiency. The kinetic data followed the Ho kinetic model with correlation coefficient (R2) of 0.999 at 20 mg/L. The isotherm data fitted into the Langmuir isotherm. The experimental data obtained indicated that the use of ZnO NPs adsorbent for the reduction of F in F containing wastewater is feasible. © 2020, International Society for Fluoride Research. All rights reserved.
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