Adsorption of Fluoride from Aqueous Solution on Calcined and Uncalcined Layered Double Hydroxide
The adsorption capacity of uncalcined and calcined layered double hydroxide (LDH) for fluoride removal was studied in this work. The LDH was synthesized by a co-precipitation method and calcined at various temperatures. The equilibrium data for fluoride adsorption on the LDHs were obtained in a batc...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2015-04-01
|
| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.33.4.393 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1841564517832589312 |
|---|---|
| author | L.A. Ramírez-Llamas R. Leyva-Ramos A. Jacobo-Azuara J.M. Martínez-Rosales E.D. Isaacs-Paez |
| author_facet | L.A. Ramírez-Llamas R. Leyva-Ramos A. Jacobo-Azuara J.M. Martínez-Rosales E.D. Isaacs-Paez |
| author_sort | L.A. Ramírez-Llamas |
| collection | DOAJ |
| description | The adsorption capacity of uncalcined and calcined layered double hydroxide (LDH) for fluoride removal was studied in this work. The LDH was synthesized by a co-precipitation method and calcined at various temperatures. The equilibrium data for fluoride adsorption on the LDHs were obtained in a batch adsorber, and the Freundlich isotherm model showed a better fit to the data. The LDH was chemically stable over the pH range of 5–12, but readily dissolved when the pH was below 5. The fluoride adsorption capacity of LDH decreased by raising the pH due to electrostatic interactions, and presented a maximum at 25 °C. The adsorption capacity of LDH was influenced by the calcination temperature and was enhanced by increasing the calcination temperature. The calcination destroyed the crystalline structure of the LDH, which was recovered when the calcined LDH was rehydrated in aqueous solution. The calcined LDH had a very high adsorption capacity towards fluoride. |
| format | Article |
| id | doaj-art-1387c6b89c3a41f7823597034bf1ba50 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2015-04-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-1387c6b89c3a41f7823597034bf1ba502025-01-02T22:37:59ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382015-04-013310.1260/0263-6174.33.4.393Adsorption of Fluoride from Aqueous Solution on Calcined and Uncalcined Layered Double HydroxideL.A. Ramírez-Llamas0R. Leyva-Ramos1A. Jacobo-Azuara2J.M. Martínez-Rosales3E.D. Isaacs-Paez4 Department of Chemistry, Division of Natural Sciences, University of Guanajuato, Noria Alta s/n, Guanajuato, Guanajuato 36050, México Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis, México Department of Chemistry, Division of Natural Sciences, University of Guanajuato, Noria Alta s/n, Guanajuato, Guanajuato 36050, México Department of Chemistry, Division of Natural Sciences, University of Guanajuato, Noria Alta s/n, Guanajuato, Guanajuato 36050, México Centro de Investigación y Estudios de Posgrado, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis, MéxicoThe adsorption capacity of uncalcined and calcined layered double hydroxide (LDH) for fluoride removal was studied in this work. The LDH was synthesized by a co-precipitation method and calcined at various temperatures. The equilibrium data for fluoride adsorption on the LDHs were obtained in a batch adsorber, and the Freundlich isotherm model showed a better fit to the data. The LDH was chemically stable over the pH range of 5–12, but readily dissolved when the pH was below 5. The fluoride adsorption capacity of LDH decreased by raising the pH due to electrostatic interactions, and presented a maximum at 25 °C. The adsorption capacity of LDH was influenced by the calcination temperature and was enhanced by increasing the calcination temperature. The calcination destroyed the crystalline structure of the LDH, which was recovered when the calcined LDH was rehydrated in aqueous solution. The calcined LDH had a very high adsorption capacity towards fluoride.https://doi.org/10.1260/0263-6174.33.4.393 |
| spellingShingle | L.A. Ramírez-Llamas R. Leyva-Ramos A. Jacobo-Azuara J.M. Martínez-Rosales E.D. Isaacs-Paez Adsorption of Fluoride from Aqueous Solution on Calcined and Uncalcined Layered Double Hydroxide Adsorption Science & Technology |
| title | Adsorption of Fluoride from Aqueous Solution on Calcined and Uncalcined Layered Double Hydroxide |
| title_full | Adsorption of Fluoride from Aqueous Solution on Calcined and Uncalcined Layered Double Hydroxide |
| title_fullStr | Adsorption of Fluoride from Aqueous Solution on Calcined and Uncalcined Layered Double Hydroxide |
| title_full_unstemmed | Adsorption of Fluoride from Aqueous Solution on Calcined and Uncalcined Layered Double Hydroxide |
| title_short | Adsorption of Fluoride from Aqueous Solution on Calcined and Uncalcined Layered Double Hydroxide |
| title_sort | adsorption of fluoride from aqueous solution on calcined and uncalcined layered double hydroxide |
| url | https://doi.org/10.1260/0263-6174.33.4.393 |
| work_keys_str_mv | AT laramirezllamas adsorptionoffluoridefromaqueoussolutiononcalcinedanduncalcinedlayereddoublehydroxide AT rleyvaramos adsorptionoffluoridefromaqueoussolutiononcalcinedanduncalcinedlayereddoublehydroxide AT ajacoboazuara adsorptionoffluoridefromaqueoussolutiononcalcinedanduncalcinedlayereddoublehydroxide AT jmmartinezrosales adsorptionoffluoridefromaqueoussolutiononcalcinedanduncalcinedlayereddoublehydroxide AT edisaacspaez adsorptionoffluoridefromaqueoussolutiononcalcinedanduncalcinedlayereddoublehydroxide |