Synthesis and properties of Fe3O4-activated carbon magnetic nanoparticles for removal of aniline from aqueous solution: equilibrium, kinetic and thermodynamic studies

Journal of Environmental Health Science Engineering

Ali Esrafily¹  Ahmad Ameri¹  Simin Nasseri²  Roshanak Rezaei²  Ahmad Jonidi³  Babak Kakavandi¹ 

[1] Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran;Center for Water Quality Research (CWOR), Intitute for Environmental Research (IER), Tehran, University of Medical Sciences, Tehran, Iran;Faculty of Medical sciences, Faculty of Medical sciences, Tarbiat Modares University, Tehran, Iran

关键词: Thermodynamic;    Kinetics;    Aniline;    Adsorption;    Fe₃O₄-activated carbon magnetic nanoparticles;   

Others  :  820964
DOI  :  10.1186/1735-2746-10-19

 received in 2012-07-31, accepted in 2013-01-13,  发布年份 2013

【 摘 要 】

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.

【 授权许可】

   
2013 Kakavandi et al; licensee BioMed Central Ltd.

【 图 表 】

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