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<p>Alumina-coated magnetic chitosan/polyacrylamide (CS/PAMAF) was successfully synthesized for the removal of methyl orange (MO) from the aqueous solutions. The characteristic analyses including FTIR, XRD, FESEM, TEM, EDX, and VSM were used to determine the morphology of the nanocomposite. FTIR, XRD and EDX results indicated the presence of alumina and magnetic phases in the structure of the prepared sample. Morphological observations (FESEM and TEM) showed good dispersion of adsorbents particles with average size of 50 nm. Different adsorption parameters including pH, temperature, initial concentration and dosage were examined while the other operating conditions kept constant. Adsorption results showed that appropriate adsorption capacity was occurred at pH around 6 and 45°C. The experimental data were in better agreement with the Langmuir model and the maximum adsorption capacity was estimated as 278.8 mg/g. The kinetic showed good agreement with pseudo second order equation that indicates electrostatic and chemisorption adsorption mechanism.</p>

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Significant Adsorption of Ionic Dye by Modified Magnetic chitosan/polyacrylamide@alumina Nanocomposite

  • 期刊论文

  • 发表日期：

    2025年7月2日

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  • Parastoo Najafi,
  • Mohammad Zabihi,
  • Morteza Faghihi

摘要

Alumina-coated magnetic chitosan/polyacrylamide (CS/PAMAF) was successfully synthesized for the removal of methyl orange (MO) from the aqueous solutions. The characteristic analyses including FTIR, XRD, FESEM, TEM, EDX, and VSM were used to determine the morphology of the nanocomposite. FTIR, XRD and EDX results indicated the presence of alumina and magnetic phases in the structure of the prepared sample. Morphological observations (FESEM and TEM) showed good dispersion of adsorbents particles with average size of 50 nm. Different adsorption parameters including pH, temperature, initial concentration and dosage were examined while the other operating conditions kept constant. Adsorption results showed that appropriate adsorption capacity was occurred at pH around 6 and 45°C. The experimental data were in better agreement with the Langmuir model and the maximum adsorption capacity was estimated as 278.8 mg/g. The kinetic showed good agreement with pseudo second order equation that indicates electrostatic and chemisorption adsorption mechanism.