Experimental and Theoretical Insights on Methylene Blue Removal from Wastewater Using an Adsorbent Obtained from the Residues of the Orange Industry
Chemical and thermochemical transformations were performed on orange peel to obtain materials that were characterized and further tested to explore their potential as adsorbents for the removal of methylene blue (MB) from aqueous solutions. The results show the high potential of some of these materi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/26/15/4555 |
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| author | Stephanie Giraldo Irma Robles Luis A. Godínez Nancy Acelas Elizabeth Flórez |
| author_facet | Stephanie Giraldo Irma Robles Luis A. Godínez Nancy Acelas Elizabeth Flórez |
| author_sort | Stephanie Giraldo |
| collection | DOAJ |
| description | Chemical and thermochemical transformations were performed on orange peel to obtain materials that were characterized and further tested to explore their potential as adsorbents for the removal of methylene blue (MB) from aqueous solutions. The results show the high potential of some of these materials for MB adsorption not only due to the surface area of the resulting substrate but also to the chemistry of the corresponding surface functional groups. Fitting of the kinetic as well as the equilibrium experimental data to different models suggests that a variety of interactions are involved in MB adsorption. The overall capacities for these substrates (larger than 192.31 mg g<sup>−1</sup>) were found to compare well with those reported for activated carbon and other adsorbents of agro-industrial origin. According to these results and complementary with theoretical study using Density Functional Theory (DFT) approximations, it was found that the most important adsorption mechanisms of MB correspond to: (i) electrostatic interactions, (ii) H-bonding, and (iii) π (MB)–π (biochar) interactions. In view of these findings, it can be concluded that adsorbent materials obtained from orange peel, constitute a good alternative for the removal of MB dye from aqueous solutions. |
| first_indexed | 2024-03-10T09:11:14Z |
| format | Article |
| id | doaj.art-8ce02b899f7e48bc8a1038f2ea31b1a4 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T09:11:14Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
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| series | Molecules |
| spelling | doaj.art-8ce02b899f7e48bc8a1038f2ea31b1a42023-11-22T05:59:49ZengMDPI AGMolecules1420-30492021-07-012615455510.3390/molecules26154555Experimental and Theoretical Insights on Methylene Blue Removal from Wastewater Using an Adsorbent Obtained from the Residues of the Orange IndustryStephanie Giraldo0Irma Robles1Luis A. Godínez2Nancy Acelas3Elizabeth Flórez4Grupo de Investigación Materiales con Impacto (Mat&mpac), Facultad de Ciencias Básicas, Universidad de Medellín, Carrera 87 No. 30-65, Medellín 050026, ColombiaCentro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Parque Tecnológico Querétaro, Sanfandila, Pedro Escobedo 76703, Querétaro, MexicoCentro de Investigación y Desarrollo Tecnológico en Electroquímica S. C., Parque Tecnológico Querétaro, Sanfandila, Pedro Escobedo 76703, Querétaro, MexicoGrupo de Investigación Materiales con Impacto (Mat&mpac), Facultad de Ciencias Básicas, Universidad de Medellín, Carrera 87 No. 30-65, Medellín 050026, ColombiaGrupo de Investigación Materiales con Impacto (Mat&mpac), Facultad de Ciencias Básicas, Universidad de Medellín, Carrera 87 No. 30-65, Medellín 050026, ColombiaChemical and thermochemical transformations were performed on orange peel to obtain materials that were characterized and further tested to explore their potential as adsorbents for the removal of methylene blue (MB) from aqueous solutions. The results show the high potential of some of these materials for MB adsorption not only due to the surface area of the resulting substrate but also to the chemistry of the corresponding surface functional groups. Fitting of the kinetic as well as the equilibrium experimental data to different models suggests that a variety of interactions are involved in MB adsorption. The overall capacities for these substrates (larger than 192.31 mg g<sup>−1</sup>) were found to compare well with those reported for activated carbon and other adsorbents of agro-industrial origin. According to these results and complementary with theoretical study using Density Functional Theory (DFT) approximations, it was found that the most important adsorption mechanisms of MB correspond to: (i) electrostatic interactions, (ii) H-bonding, and (iii) π (MB)–π (biochar) interactions. In view of these findings, it can be concluded that adsorbent materials obtained from orange peel, constitute a good alternative for the removal of MB dye from aqueous solutions.https://www.mdpi.com/1420-3049/26/15/4555adsorptiondyesorange peeladsorption mechanismDFT |
| spellingShingle | Stephanie Giraldo Irma Robles Luis A. Godínez Nancy Acelas Elizabeth Flórez Experimental and Theoretical Insights on Methylene Blue Removal from Wastewater Using an Adsorbent Obtained from the Residues of the Orange Industry Molecules adsorption dyes orange peel adsorption mechanism DFT |
| title | Experimental and Theoretical Insights on Methylene Blue Removal from Wastewater Using an Adsorbent Obtained from the Residues of the Orange Industry |
| title_full | Experimental and Theoretical Insights on Methylene Blue Removal from Wastewater Using an Adsorbent Obtained from the Residues of the Orange Industry |
| title_fullStr | Experimental and Theoretical Insights on Methylene Blue Removal from Wastewater Using an Adsorbent Obtained from the Residues of the Orange Industry |
| title_full_unstemmed | Experimental and Theoretical Insights on Methylene Blue Removal from Wastewater Using an Adsorbent Obtained from the Residues of the Orange Industry |
| title_short | Experimental and Theoretical Insights on Methylene Blue Removal from Wastewater Using an Adsorbent Obtained from the Residues of the Orange Industry |
| title_sort | experimental and theoretical insights on methylene blue removal from wastewater using an adsorbent obtained from the residues of the orange industry |
| topic | adsorption dyes orange peel adsorption mechanism DFT |
| url | https://www.mdpi.com/1420-3049/26/15/4555 |
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