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Adsorption of ruthenium ions on activated charcoal: influence of temperature on the kinetics of the adsorption process
Author(s): 
Pages: 353-356
Year: Issue:  5
Journal: JOURNAL OF ZHEJIANG UNIVERSITY SCIENCE

Keyword:  RutheniumActivated charcoalAdsorptionKineticsThermodynamic parametersNitric acid solution;
Abstract: Influence of temperature on ruthenium adsorption on activated charcoal from 3 mol/L HNO3 solutions was investigated in the temperature range of 288 K to 308 K. It was observed that the rise in temperature increases the adsorption of ruthenium ions on activated charcoal and follows the kinetics of first order rate law with rate constant values 0.0564-0.0640 min-1 in the temperature range of 288 K to 308 K respectively. The activation energy for the adsorption process was found to be 1.3806kJ/mol. Various thermodynamics quantities namely △H, △S and △G were computed from the equilibrium constant KC values. The results indicated a positive heat of adsorption, a positive △S and a negative △G.
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