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Thermodynamic, Kinetic, and Equilibrium Parameters for the Removal of Lead and Cadmium from Aqueous Solutions with Calcium Alginate Beads
Joint Authors
Alfaro-Cuevas-Villanueva, Ruth
Hidalgo-Vázquez, Aura Roxana
Cortés Penagos, Consuelo de Jesús
Cortés-Martínez, Raúl
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-01-27
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Medicine
Information Technology and Computer Science
Abstract EN
The sorption of cadmium (Cd) and lead (Pb) by calcium alginate beads (CAB) from aqueous solutions in batch systems was investigated.
The kinetic and thermodynamic parameters, as well as the sorption capacities of CAB in each system at different temperatures, were evaluated.
The rate of sorption for both metals was rapid in the first 10 minutes and reached a maximum in 50 minutes.
Sorption kinetic data were fitted to Lagergren, pseudo-second-order and Elovich models and it was found that the second-order kinetic model describes these data for the two metals; comparing kinetic parameters for Cd and Pb sorption a higher kinetic rate (K2) for Pb was observed, indicating that the interaction between lead cations and alginate beads was faster than for cadmium.
Similarly, isotherm data were fitted to different models reported in literature and it was found that the Langmuir-Freundlich (L-F) and Dubinin-Radushkevich (D-R) models describe the isotherms in all cases.
CAB sorption capacity for cadmium was 27.4 mg/g and 150.4 mg/g for lead, at 25°C.
Sorption capacities of Cd and Pb increase as temperature rises.
According to the thermodynamic parameters, the cadmium and lead adsorption process was spontaneous and endothermic.
It was also found that pH has an important effect on the adsorption of these metals by CAB, as more were removed at pH values between 6 and 7.
American Psychological Association (APA)
Alfaro-Cuevas-Villanueva, Ruth& Hidalgo-Vázquez, Aura Roxana& Cortés Penagos, Consuelo de Jesús& Cortés-Martínez, Raúl. 2014. Thermodynamic, Kinetic, and Equilibrium Parameters for the Removal of Lead and Cadmium from Aqueous Solutions with Calcium Alginate Beads. The Scientific World Journal،Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1050490
Modern Language Association (MLA)
Alfaro-Cuevas-Villanueva, Ruth…[et al.]. Thermodynamic, Kinetic, and Equilibrium Parameters for the Removal of Lead and Cadmium from Aqueous Solutions with Calcium Alginate Beads. The Scientific World Journal No. 2014 (2014), pp.1-9.
https://search.emarefa.net/detail/BIM-1050490
American Medical Association (AMA)
Alfaro-Cuevas-Villanueva, Ruth& Hidalgo-Vázquez, Aura Roxana& Cortés Penagos, Consuelo de Jesús& Cortés-Martínez, Raúl. Thermodynamic, Kinetic, and Equilibrium Parameters for the Removal of Lead and Cadmium from Aqueous Solutions with Calcium Alginate Beads. The Scientific World Journal. 2014. Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1050490
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1050490