Author/Authors :
Kakavandi، Babak نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , , Jonidi Jafari، Ahmad نويسنده Department of Occupational and Environment Health, Medical Sciences, Tarbiat Modares University, Tehran, Iran. , , Rezaei Kalantary، Roshanak نويسنده Department of Environmental Health, School of Health, Tehran University of Medical Sciences, Tehran, Iran. Rezaei Kalantary, Roshanak , Nasseri، Simin نويسنده 1Department of Environmental Health Engineering, School of Public Health and Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran , , Ameri، Ahmad نويسنده Associate professor of radiation oncology , , Esrafily، Ali نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran ,
Abstract :
In this study, powder activated carbon (PAC) and magnetic nanoparticles of iron (III) oxide were used for synthesis
of Fe3O4-activated carbon magnetic nanoparticles (AC-Fe3O4 MNPs) as an adsorbent for the removal of aniline. The
characteristics of adsorbent were evaluated by SEM, TEM, XRD and BET. Also, the impact of different parameters
such as pH, contact time, adsorbent dosage, aniline initials concentration and solution temperature were studied.
The experimental data investigated by Langmuir and Freundlich adsorption isotherms and two models kinetically of
pseudo first-order and pseudo second-order. The results indicated that the adsorption followed Langmuir and
pseudo second-order models with correlation r2 > 0.98 and r2 > 0.99, respectively. The equilibrium time was
obtained after 5 h. According to Langmuir model, the maximum adsorption capacity was 90.91 mg/g at pH = 6,
and 20°C. The thermodynamic parameters indicated that adsorption of aniline on magnetic activated carbon was
exothermic and spontaneous. This synthesized AC-Fe3O4 MNPs due to have advantages such as easy and rapid
separation from solution could be applied as an adsorbent effective for removal of pollutants such as aniline from
water and wastewater.
