화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.30, No.2, 448-455, February, 2013
DOI10.1007/s11814-012-0126-9  Export Citation
Adsorption ability of oxidized multiwalled carbon nanotubes towards aqueous Ce(III) and Sm(III)
Fattaneh Naderi Behdani, Alireza Talebizadeh Rafsanjani†, Meisam Torab-Mostaedi1, and Seyed Mohammad Amin Koochaki Mohammadpour
  • School of Chemical Engineering, University College of Engineering, University of Tehran, P. O. Box 11365-4563, Tehran, Iran
  • 1Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, P. O. Box 11365-8486, Tehran, Iran
E-mail:
The aim of the present work was to investigate the adsorption of Ce(III) and Sm(III) onto multiwalled carbon nanotubes (MWCNTs) oxidized with concentrate nitric acid. The effects of solution pH, adsorbent dosage, andcontact time were studied by batch technique. Langmuir, Freundlich and D-R isotherms were used to describe the adsorption behavior of Ce(III) and Sm(III) by oxidized MWCNTs, and the experimental results fitted Freundlich model well. The maximum uptake capacities (qm) calculated by applying the Langmuir equation for samarium and cerium ions were found to be 89.28 and 92.59 (mg/g), respectively. A comparison of the kinetic models and the overall experimental data was best fitted by the pseudo second-order kinetic model. The calculated thermodynamic parameters (ΔG°, ΔH°, and ΔS°) showed that the adsorption for Ce(III) and Sm(III) is feasible, spontaneous and exothermic at 30-60 ℃. Moreover, more than 70% of Ce(III) and Sm(III) adsorbed onto Oxidized MWCNTs could be desorbed with HNO3.
Keywords:Multiwalled Carbon Nanotubes (MWCNTs);Cerium;Samarium;Adsorption;Desorption;Isotherm;Kinetics
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