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http://ciateq.repositorioinstitucional.mx/jspui/handle/1020/646| Effect of process parameters on the graphite expansion produced by a green modification of the hummers method | |
| Gabriela Tarango Rivero JOSE MANUEL MENDOZA DUARTE AUDEL SANTOS BELTRAN Ivanovich Estrada-Guel C. G. Garay_Reyes Pedro Pizá Cynthia Deisy Gómez Esparza Enrique Rocha_Rangel Roberto Martínez Sánchez | |
| Acceso Abierto | |
| Atribución-NoComercial-CompartirIgual | |
| https://doi.org/10.3390/molecules27217399 | |
| 1420-3049 https://www.mdpi.com/journal/molecules https://www.mdpi.com/1420-3049/27/21/7399 | |
| Milling Graphite Exfoliation Green chemistry Hummers | |
| Adsorption stand out among other standard techniques used for water treatment because of its remarkable simplicity, easy operation, and high removal capability. Expanded graphite has been selected as a promising agent for oil spill adsorption, but its production involves the generation of corrosive remnants and massive amounts of contaminated washing waters. Although the advantageous use of the H2O2–H2SO4 mixture was described in 1978, reported works using this method are scarce. This work deals with the urgent necessity for the development of alternative chemical routes decreasing their environmental impact (based on green chemistry concepts), presenting a process for expanded graphite production using only two intercalation chemicals, reducing the consumption of sulfuric acid to only 10% and avoiding the use of strong oxidant salts (both environmentally detrimental). Three process parameters were evaluated: milling effect, peroxide concentration, and microwave expansion. Some remarkable results were obtained following this route: high specific volumes elevated oil adsorption rate exhibiting a high oil–water selectivity and rapid adsorption. Furthermore, the recycling capability was checked using up to six adsorption cycles. Results showed that milling time reduces the specimen’s expansion rate and oil adsorption capacity due to poor intercalant insertion and generation of small particle sizes. | |
| MDPI | |
| 2022 | |
| Artículo | |
| Molecules, vol. 27, no. 21, art. 7399 | |
| Inglés | |
| Público en general | |
| Tarango-Rivero, G.; Mendoza-Duarte, J.M.; Santos-Beltrán, A.; Estrada Guel, I.;Garay-Reyes, C.G.; Pizá-Ruiz, P.; Gómez-Esparza, C.D.; Rocha-Rangel, E.; Martínez-Sánchez, R. Effect of Process Parameters on the Graphite Expansion Produced by a Green Modification of the Hummers Method. Molecules 2022, 27, 7399. https://doi.org/10.3390/molecules27217399 | |
| OTRAS | |
| Versión publicada | |
| publishedVersion - Versión publicada | |
| Aparece en las colecciones: | Artículos Publicados en Revistas Indexadas |
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| Effect of process parameters on the graphite expansion.pdf | 5.65 MB | Adobe PDF | Visualizar/Abrir |