Removal and Recovery of Silver by Dynamic Adsorption on Bentonite Clay Using a Fixed-Bed Column System
Several studies have focused on the removal and recovery of precious metal ions from industrial wastewater due to their environmental and economic importance. Adsorption on bentonite clays has been shown to possess a high removal potential for several metal ions. We herein investigated the dynamic a...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2015-02-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.33.2.91 |
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| author | M. L. Cantuaria E. S. Nascimento A. F. Almeida Neto O. A. A. dos Santos M. G. A. Vieira |
| author_facet | M. L. Cantuaria E. S. Nascimento A. F. Almeida Neto O. A. A. dos Santos M. G. A. Vieira |
| author_sort | M. L. Cantuaria |
| collection | DOAJ |
| description | Several studies have focused on the removal and recovery of precious metal ions from industrial wastewater due to their environmental and economic importance. Adsorption on bentonite clays has been shown to possess a high removal potential for several metal ions. We herein investigated the dynamic adsorption of silver using a fixed-bed column and a calcined bentonite clay called Verde-lodo as an adsorbent. A fluid dynamic study was performed to evaluate the adsorption system's metal-ion removal capacity (q u and q t ), the mass transfer zone and the percentage of total removal according to different effluent's flow. Adsorption–desorption cycles were carried out using nitric acid as an eluent to evaluate the useful lifetime of the column. The breakthrough curves were fitted to the Bohart–Adams model (quasichemical). Moreover, the zeta potential was analyzed to explain the difference between the removal capacity obtained for the static and dynamic systems. |
| format | Article |
| id | doaj-art-4a7abfb13c77402c85fd7df55ba9a48c |
| institution | DOAJ |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2015-02-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-4a7abfb13c77402c85fd7df55ba9a48c2025-08-20T02:42:49ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382015-02-013310.1260/0263-6174.33.2.91Removal and Recovery of Silver by Dynamic Adsorption on Bentonite Clay Using a Fixed-Bed Column SystemM. L. Cantuaria0E. S. Nascimento1A. F. Almeida Neto2O. A. A. dos Santos3M. G. A. Vieira4 Department of Process and Products Design, School of Chemical Engineering, University of Campinas (UNICAMP), Avenida Albert Einstein, 500, CEP 13083-852, Campinas, São Paulo, Brazil Department of Process and Products Design, School of Chemical Engineering, University of Campinas (UNICAMP), Avenida Albert Einstein, 500, CEP 13083-852, Campinas, São Paulo, Brazil Department of Process and Products Design, School of Chemical Engineering, University of Campinas (UNICAMP), Avenida Albert Einstein, 500, CEP 13083-852, Campinas, São Paulo, Brazil Department of Chemical Engineering, University of Maringá, UEM, Avenida Colombo, 5790, CEP 87020-900, Maringá, Paraná, Brazil Department of Process and Products Design, School of Chemical Engineering, University of Campinas (UNICAMP), Avenida Albert Einstein, 500, CEP 13083-852, Campinas, São Paulo, BrazilSeveral studies have focused on the removal and recovery of precious metal ions from industrial wastewater due to their environmental and economic importance. Adsorption on bentonite clays has been shown to possess a high removal potential for several metal ions. We herein investigated the dynamic adsorption of silver using a fixed-bed column and a calcined bentonite clay called Verde-lodo as an adsorbent. A fluid dynamic study was performed to evaluate the adsorption system's metal-ion removal capacity (q u and q t ), the mass transfer zone and the percentage of total removal according to different effluent's flow. Adsorption–desorption cycles were carried out using nitric acid as an eluent to evaluate the useful lifetime of the column. The breakthrough curves were fitted to the Bohart–Adams model (quasichemical). Moreover, the zeta potential was analyzed to explain the difference between the removal capacity obtained for the static and dynamic systems.https://doi.org/10.1260/0263-6174.33.2.91 |
| spellingShingle | M. L. Cantuaria E. S. Nascimento A. F. Almeida Neto O. A. A. dos Santos M. G. A. Vieira Removal and Recovery of Silver by Dynamic Adsorption on Bentonite Clay Using a Fixed-Bed Column System Adsorption Science & Technology |
| title | Removal and Recovery of Silver by Dynamic Adsorption on Bentonite Clay Using a Fixed-Bed Column System |
| title_full | Removal and Recovery of Silver by Dynamic Adsorption on Bentonite Clay Using a Fixed-Bed Column System |
| title_fullStr | Removal and Recovery of Silver by Dynamic Adsorption on Bentonite Clay Using a Fixed-Bed Column System |
| title_full_unstemmed | Removal and Recovery of Silver by Dynamic Adsorption on Bentonite Clay Using a Fixed-Bed Column System |
| title_short | Removal and Recovery of Silver by Dynamic Adsorption on Bentonite Clay Using a Fixed-Bed Column System |
| title_sort | removal and recovery of silver by dynamic adsorption on bentonite clay using a fixed bed column system |
| url | https://doi.org/10.1260/0263-6174.33.2.91 |
| work_keys_str_mv | AT mlcantuaria removalandrecoveryofsilverbydynamicadsorptiononbentoniteclayusingafixedbedcolumnsystem AT esnascimento removalandrecoveryofsilverbydynamicadsorptiononbentoniteclayusingafixedbedcolumnsystem AT afalmeidaneto removalandrecoveryofsilverbydynamicadsorptiononbentoniteclayusingafixedbedcolumnsystem AT oaadossantos removalandrecoveryofsilverbydynamicadsorptiononbentoniteclayusingafixedbedcolumnsystem AT mgavieira removalandrecoveryofsilverbydynamicadsorptiononbentoniteclayusingafixedbedcolumnsystem |