Application of Activated Carbon Obtained from Spent Coffee Ground Wastes to Effective Terbium Recovery from Liquid Solutions
A process aimed at the recovery of terbium from liquid solutions using activated carbon (AC) derived from spent coffee grounds (SCG) was assessed. AC was obtained using the hydro-alcoholic treatment of SCG, followed by the physical activation of the as-obtained product. The AC exhibited both micropo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/4/630 |
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| author | Lorena Alcaraz Dayana Nathaly Saquinga Francisco J. Alguacil Esther Escudero Félix A. López |
| author_facet | Lorena Alcaraz Dayana Nathaly Saquinga Francisco J. Alguacil Esther Escudero Félix A. López |
| author_sort | Lorena Alcaraz |
| collection | DOAJ |
| description | A process aimed at the recovery of terbium from liquid solutions using activated carbon (AC) derived from spent coffee grounds (SCG) was assessed. AC was obtained using the hydro-alcoholic treatment of SCG, followed by the physical activation of the as-obtained product. The AC exhibited both microporous and mesoporous structures, which were shown by the corresponding nitrogen adsorption–desorption isotherms and scanning electron microscopy (SEM) images. In addition, a certain graphitic character was found in the micro-Raman measurements. By use of this AC, terbium adsorption was investigated, and the influence of solution pH, temperature, and the adsorbent amount on terbium uptake was tested. In addition, adsorption isotherms and kinetic studies were also evaluated. The best fit was found for the type-1 Langmuir isotherm and pseudo-second-order kinetics model. Thermodynamic studies revealed that terbium adsorption is an endothermic and spontaneous process. Terbium desorption by the use of acidic solutions was also investigated. This work demonstrated that it is possible to recover this valuable metal from liquid solution using the present AC. |
| first_indexed | 2024-03-10T12:21:12Z |
| format | Article |
| id | doaj.art-648a83db495f4f2fbf99f768eff9b194 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T12:21:12Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-648a83db495f4f2fbf99f768eff9b1942023-11-21T15:26:19ZengMDPI AGMetals2075-47012021-04-0111463010.3390/met11040630Application of Activated Carbon Obtained from Spent Coffee Ground Wastes to Effective Terbium Recovery from Liquid SolutionsLorena Alcaraz0Dayana Nathaly Saquinga1Francisco J. Alguacil2Esther Escudero3Félix A. López4National Center for Metallurgical Research (CENIM), Spanish National Research Council (CSIC), Avda. Gregorio del Amo 8, 28040 Madrid, SpainSchool of Chemical Sciences & Engineering, Yachay Tech University, Hacienda San José s/n, de San Miguel de Urcuquí 100119, EcuadorNational Center for Metallurgical Research (CENIM), Spanish National Research Council (CSIC), Avda. Gregorio del Amo 8, 28040 Madrid, SpainNational Center for Metallurgical Research (CENIM), Spanish National Research Council (CSIC), Avda. Gregorio del Amo 8, 28040 Madrid, SpainNational Center for Metallurgical Research (CENIM), Spanish National Research Council (CSIC), Avda. Gregorio del Amo 8, 28040 Madrid, SpainA process aimed at the recovery of terbium from liquid solutions using activated carbon (AC) derived from spent coffee grounds (SCG) was assessed. AC was obtained using the hydro-alcoholic treatment of SCG, followed by the physical activation of the as-obtained product. The AC exhibited both microporous and mesoporous structures, which were shown by the corresponding nitrogen adsorption–desorption isotherms and scanning electron microscopy (SEM) images. In addition, a certain graphitic character was found in the micro-Raman measurements. By use of this AC, terbium adsorption was investigated, and the influence of solution pH, temperature, and the adsorbent amount on terbium uptake was tested. In addition, adsorption isotherms and kinetic studies were also evaluated. The best fit was found for the type-1 Langmuir isotherm and pseudo-second-order kinetics model. Thermodynamic studies revealed that terbium adsorption is an endothermic and spontaneous process. Terbium desorption by the use of acidic solutions was also investigated. This work demonstrated that it is possible to recover this valuable metal from liquid solution using the present AC.https://www.mdpi.com/2075-4701/11/4/630rare earth recoverylow-cost adsorbentspent coffee wastesterbium elution |
| spellingShingle | Lorena Alcaraz Dayana Nathaly Saquinga Francisco J. Alguacil Esther Escudero Félix A. López Application of Activated Carbon Obtained from Spent Coffee Ground Wastes to Effective Terbium Recovery from Liquid Solutions Metals rare earth recovery low-cost adsorbent spent coffee wastes terbium elution |
| title | Application of Activated Carbon Obtained from Spent Coffee Ground Wastes to Effective Terbium Recovery from Liquid Solutions |
| title_full | Application of Activated Carbon Obtained from Spent Coffee Ground Wastes to Effective Terbium Recovery from Liquid Solutions |
| title_fullStr | Application of Activated Carbon Obtained from Spent Coffee Ground Wastes to Effective Terbium Recovery from Liquid Solutions |
| title_full_unstemmed | Application of Activated Carbon Obtained from Spent Coffee Ground Wastes to Effective Terbium Recovery from Liquid Solutions |
| title_short | Application of Activated Carbon Obtained from Spent Coffee Ground Wastes to Effective Terbium Recovery from Liquid Solutions |
| title_sort | application of activated carbon obtained from spent coffee ground wastes to effective terbium recovery from liquid solutions |
| topic | rare earth recovery low-cost adsorbent spent coffee wastes terbium elution |
| url | https://www.mdpi.com/2075-4701/11/4/630 |
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