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Application of Nano Aluminum Oxide and Multi-Walled Carbon Nanotube in Fluoride Removal Publisher



Rostami I1 ; Mahvi AH2, 3 ; Dehghani MH2, 3 ; Baghani AN1 ; Marandi R4
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, School of Public Health, Shiraz University of Medical Sciences, Shiraz, Islamic, Iran
  2. 2. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Environmental Engineering, Islamic Azad University, North Tehran Branch, Iran

Source: Desalination and Water Treatment Published:2017


Abstract

The problem of environmental pollution by nanoparticles, which have recently entered the industrial processes around the world, is very important. This study aimed to determine the optimum condition (pH, initial concentration, and sorbent dosage) for removal of fluoride using multi-walled carbon nanotubes (MWCNTs) and nano aluminum oxide (Al2O3). Then, the mortality rate of Daphnia magna using Al2O3 laden with fluoride and MWCNTs laden with fluoride was investigated under the acquired optimum conditions. The obtained results showed that the highest removal rate of fluoride was 96.9% for Al2O3 at pH = 6 and 60.1% for MWCNTs at pH = 5. The lethal concentration-50 (LC50-24 h) was 0.501 g/L for MWCNTs laden with fluoride and 0.475 g/L for Al2O3 laden with fluoride. Besides, the LC50-48 h was 1.188 and 1.101 g/L for Al2O3 laden with fluoride and MWCNTs laden with fluoride, respectively. The study findings demonstrated that Al2O3 laden with fluoride and MWCNTs laden with fluoride had the lowest toxicity and mortality effects on Daphnia magna. © 2017, Desalination Publications. All rights reserved.
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