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A Comparison Study of Granular Activated Carbon Modification by Fecl 3 Under the Acidic and Basic Condition for Arsenic Removal From Water Publisher



Mahdavi M1, 2 ; Mahvi AH3 ; Fatehizadeh A4 ; Sadani M5 ; Shahmoradi B6 ; Ebrahimi A4, 7
Authors
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Authors Affiliations
  1. 1. Environmental Health Engineering, Saveh University of Medical Sciences, Saveh, Iran
  2. 2. Social Determinants of Health Research Center, Saveh University of Medical Sciences, Saveh, Iran
  3. 3. Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Science, Tehran, Iran
  4. 4. Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
  5. 5. Department of Environmental Health Engineering, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  6. 6. Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran
  7. 7. Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Desalination and Water Treatment Published:2019


Abstract

The present study deals with the effect of two different conditions for modification of raw granular activated carbon (GAC) with FeCl 3 under acidic granular activated carbon (AGAC) and basic granular activated carbon (BGAC) conditions for removal of arsenic – As(V) – from aqueous solution. X-ray diffraction, scanning electron microscopy, and Brunauer–Emmett–Teller (BET) were used for structural properties. Obtained images show that for raw GAC most of the peaks are related to SiO 2 and graphite, but, for AGAC related to Fe 2 O 3 , Fe 3 O 4 , and SiO 2 , and for BGAC related to Fe 3 O 4 and hydrogen aluminum silicate. Surface area and total pore volume of raw GAC > AGAC > BGAC. Kinetics study for arsenic removal by raw GAC and BGAC obeyed pseudo-first-order model, but, AGAC obeyed pseudo-second-order model. Isotherm study showed that raw GAC has a good fit with Langmuir model, and AGAC and BGAC have a good fit with Freundlich model. The adsorption capacity of AGAC, BGAC, and raw GAC (As(V) concentration = 0.3 mg/L) was 22.7, 18.33, and 14.35 mg/g, respectively. It was concluded that modified raw GAC under the acidic condition had better than basic condition. © 2019 Desalination Publications. All rights reserved.