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Magnetic carbon nanocomposite derived from waste tire rubber for atrazine removal from aqueous solutions

Heydarian Dana, N ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.5004/dwt.2022.28141
  3. Publisher: Desalination Publications , 2022
  4. Abstract:
  5. In this study magnetite nanoparticles (Fe3 O4) were synthesized and embedded in activated carbon (AC) derived from waste tire rubber to produce magnetic activated carbon. The atrazine (C8 H14 ClN5) adsorption was performed over (AC/Fe3 O4) nanocomposite in an aqueous solution and adsorp-tion isotherms and kinetics were determined. The effects of some parameters such as (pH, contact time, adsorbent dosage and initial pesticide concentration) were investigated. Characterization of nanocomposite was carried out by high-resolution scanning electron microscopy and transmission electron microscopy, X-ray powder diffraction, vibrating sample magnetometer, Brunauer–Emmett– Teller, Fourier-transform infrared spectroscopy (FTIR), energy-dispersive X-ray spectroscopy, and zeta potential analyses. The characterization results showed that the synthesized composite has a mesoporous cubic structure along with narrow size distribution of uniform Fe3 O4 particles in the carbon matrix. The composite showed super magnetic behavior considering to its low coercivity (2.44 Qe) and high saturation magnetization (36.43 emu g–1). The FTIR spectra exhibited successful bonding of iron ions on activated carbon surface. The adsorption study showed that the atra-zine concentration reached to equilibrium after 220 min, and the optimum atrazine removal was 76% at pH = 8, 1 g L–1 adsorbent dosage, and 15 mg L–1 of atrazine concentration. The adsorption data fitted Langmuir model and showed a higher correlation with pseudo-second-order reaction. © 2022 Desalination Publications. All rights reserved
  6. Keywords:
  7. Adsorption process ; Aqueous solutions ; Atrazine ; Magnetic nanocomposite ; Waste tire rubber ; Adsorption ; Aqueous solution ; Atrazine ; Desalination ; Nanocomposite ; Persistent organic pollutant ; Rubber ; Solid waste ; Tire
  8. Source: Desalination and Water Treatment ; Volume 252 , 2022 , Pages 219-232 ; 19443994 (ISSN)
  9. URL: https://www.deswater.com/DWT_abstracts/vol_252/252_2022_219.pdf