Multiwalled Carbon Nanotubes: Adsorbent for Ruthenium from Aqueous Solution
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This paper describes the adsorption behavior of ruthenium on multi walled carbon nanotubes (MWCNTs) from aqueous solution. The adsorption behavior of ruthenium on MWCNTs was studied with respect to contact time, pH, concentration of metal ion, adsorbent dosages and temperature. The equilibrium adsorption data were fitted to Pseudo first order, Pseudo second order, Elovich and Intra-particle diffusion kinetic model as well as Langmuir, Freundlich, Dubinin–Radushkevich and Temkin isotherm models. The Langmuir adsorption isotherm model was found to be best fitted in terms of standard deviation and regression coefficient. The thermodynamics parameter such as ΔH°, ΔS°, ΔG° were also calculated. The endothermic nature of adsorption is indicated by positive value of ΔH° and ΔS° resulting the randomness at solid solution interface towards favorable adsorption.
KeywordsNano tubes Ruthenium Adsorption Langmuir Isotherm
The authors convey their sincere thanks to Dr. B. Venkatraman, Director, SQ & RMG, Dr. R. Baskaran, AD, RESG and R. Mathiyarasu, Head, RBDS for their constant encouragement and guidance throughout this work. The authors are also thankful to P. Ilaiyaraja and Ashish Kumar Singha Deb for their constant support during the course of this work. This work forms a part of the thesis to be submitted to the Homi Bhabha National Institute (HBNI), Mumbai by Mr. B.N. Mohanty for the award of Ph.D degree in Chemistry.
- 5.Aly HF, EL-said N, Kassem AT (2016) Separation and speciation of ruthenium from nitrate medium by Ira-410 anion exchangers kinetic, thermodynamics and reaction mechanism. Eur J Appl Sci 8(1):28–40Google Scholar
- 27.Kora AJ, Bhaskarapillai A, Toleti SR (2016) Exopolymer produced by Pseudomonas aeruginosa: a super sorbent for ruthenium. Sep Sci Technol 51(9):1455–1460Google Scholar
- 38.Siczek AA, Steindler MJ (1978) The chemistry of ruthenium and zirconium in the PUREX solvent extraction process. Atomic Energy Rev 16(4):575–618Google Scholar