Journal
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
Volume 35, Issue 2, Pages 244-254Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01932691.2013.785361
Keywords
Adsorption; dysprosium; isotherm; lanthanum; Multiwalled carbon nanotubes (MWCNTS)
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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 99.01mg/g for La(III) and 78.12mg/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.
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