Adsorption Isotherm, Kinetic, Thermodynamic, and Desorption Studies of Lanthanum and Dysprosium on Oxidized Multiwalled Carbon Nanotubes

The adsorption behavior of La(III) and Dy(III) onto multiwalled carbon nanotubes oxidized (MWCNTs-oxidized) with concentrate nitric acid as a function of pH and adsorbent dosage was studied by batch technique. Maximum adsorption uptakes, according to the Langmuir model were obtained as 99.01 mg/g fo...

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Bibliographic Details
Published in:Journal of dispersion science and technology 2014-02, Vol.35 (2), p.244-254
Main Authors: Koochaki-Mohammadpour, Seyed Mohammad Amin, Torab-Mostaedi, Meisam, Talebizadeh-Rafsanjani, Alireza, Naderi-Behdani, Fattaneh
Format: Article
Language:English
Subjects:
Adsorption
Carbon
Chemistry
Colloidal state and disperse state
Desorption
Dispersions
dysprosium
Exact sciences and technology
General and physical chemistry
isotherm
lanthanum
Mathematical models
Multi wall carbon nanotubes
Multiwalled carbon nanotubes (MWCNTS)
Nanotechnology
Nanotubes
Surface physical chemistry
Thermodynamics
Uptakes
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Summary:The adsorption behavior of La(III) and Dy(III) onto multiwalled carbon nanotubes oxidized (MWCNTs-oxidized) with concentrate nitric acid as a function of pH and adsorbent dosage was studied by batch technique. Maximum adsorption uptakes, according to the Langmuir model were obtained as 99.01 mg/g for La(III) and 78.12 mg/g for Dy(III). The results showed that adsorption process of both metals ions followed well the pseudo-second-order kinetics. The results of Thermodynamic parameters showed that the adsorption of La(III) and Dy(III) onto MWCNTs-oxidized is a feasible, spontaneous, and exothermic process. The results of desorption indicated that most of the adsorbed La(III) and Dy(III) can be easily desorbed from MWCNTs-oxidized at low pH values.
ISSN:0193-2691
1532-2351
DOI:10.1080/01932691.2013.785361