Téléchargement | - Voir le manuscrit accepté : Adsorption and desorption of Methylene blue on porous Carbon monoliths and nanocrystalline cellulose (PDF, 1.5 Mio)
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DOI | Trouver le DOI : https://doi.org/10.1021/am403222u |
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Auteur | Rechercher : He, Xiaoyun; Rechercher : Male, Keith B.1; Rechercher : Nesterenko, Pavel N.; Rechercher : Brabazon, Dermot; Rechercher : Paull, Brett; Rechercher : Luong, John H. T.1 |
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Affiliation | - Conseil national de recherches du Canada. Développement des cultures et des ressources aquatiques
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Format | Texte, Article |
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Sujet | activated carbon; adsorption; carbon monolith; desorption; kinetics; methylene blue; nanocrystalline cellulose |
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Résumé | The dynamic batch adsorption of methylene blue (MB), a widely used and toxic dye, onto nanocrystalline cellulose (NCC) and crushed powder of carbon monolith (CM) was investigated using the pseudo-first- and -second-order kinetics. CM outperformed NCC with a maximum capacity of 127 mg/g compared to 101 mg/g for NCC. The Langmuir isotherm model was applicable for describing the binding data for MB on CM and NCC, indicating the homogeneous surface of these two materials. The Gibbs free energy of −15.22 kJ/mol estimated for CM unravelled the spontaneous nature of this adsorbent for MB, appreciably faster than the use of NCC (−4.47 kJ/mol). Both pH and temperature exhibited only a modest effect on the adsorption of MB onto CM. The desorption of MB from CM using acetonitrile was very effective with more than 94 % of MB desorbed from CM within 10 min to allow the reusability of this porous carbon material. In contrast, acetonitrile was less effective than ethanol in desorbing MB from NCC. The two solvents were incapable of completely desorbing MB on commercial granular coal-derived activated carbon. |
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Date de publication | 2013-08-09 |
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Maison d’édition | ACS Publications |
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Dans | |
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Langue | anglais |
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Publications évaluées par des pairs | Oui |
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Numéro du CNRC | NRCC 55601 |
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Numéro NPARC | 21268642 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | 92dadc96-875c-42db-a950-95b3cfe81f64 |
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Enregistrement créé | 2013-11-05 |
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Enregistrement modifié | 2020-06-04 |
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