Journal
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 32, Issue 4, Pages 725-734Publisher
ELSEVIER
DOI: 10.1016/j.msec.2012.01.015
Keywords
Adsorption; Congo red (CR); Palladium nanoparticles loaded on activated carbon (Pd NPs-AC); Zinc oxide nanorods loaded on activated carbon (ZnO NRs-AC); Silver nanoparticles loaded on activated carbon (Ag NPs-AC); Kinetic and thermodynamics of adsorption
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Funding
- Graduate School and Research Council of the University of Yasouj
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The adsorption of Congo red (CR) into three new adsorbents including Palladium and silver nanoparticles loaded on activated carbon (Pd NPs-AC, Ag NPs-AC) and zinc oxide nanorods loaded on activated carbon (ZnO-NRs-AC) in a batch method has been studied following the optimization of effective variables including pH, amount of adsorbents and time. The experimental data was fitted to conventional kinetic models including the pseudo first-order and second-order Elovich and intraparticle diffusion model and based on calculated respective parameters such as rate constants, equilibrium adsorption capacities and correlation coefficients. It was found that for all adsorbents the removal process follows the pseudo second other kinetic model with involvement of interparticle diffusion model. The experimental isotherm data were analyzed using the Langmuir, Freundlich, Tempkin and Dubinin and Radushkevich equations and it was found for all adsorbents that the removal process followed the Langmuir isotherm. (c) 2012 Elsevier B.V. All rights reserved.
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