Removal of Remazol brilliant violet textile dye by adsorption using rice hulls
| Autor: | Geyse Adriana Corrêa Ribeiro, Domingos Sérgio Araújo Silva, Clayane Carvalho dos Santos, Adriana Pires Vieira, Cícero Wellington Brito Bezerra, Auro Atsushi Tanaka, Sirlane Aparecida Abreu Santana |
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| Jazyk: | English<br />Portuguese |
| Předmět: | |
| Zdroj: | Polímeros, Vol 27, Iss 1, Pp 16-26 |
| Druh dokumentu: | article |
| ISSN: | 1678-5169 0104-1428 |
| DOI: | 10.1590/0104-1428.2386 |
| Popis: | Abstract The release of industrial effluents into the environment causes widespread contamination of aquatic systems. Adsorption is seen as one of the most promising treatment processes, and lignocellulosic materials have gained prominence as adsorbents. This study investigates the potential of rice hulls, either in natura or treated with nitric acid, as adsorbents for removal of the dye. The adsorbents were characterized by infrared spectroscopy, solid state 13C-NMR, thermogravimetric analysis, and pH at point of zero charge. The dye adsorption experiments were carried out in batch mode, using different experimental conditions. The kinetic adsorption data could be fitted using the model of Elovich. The Freundlich model provided the best fit to the isothermal data. The thermodynamic parameters confirmed the spontaneity of the adsorption process. These adsorbents offer an alternative for dye removal, with advantages including biomass availability and low cost. |
| Databáze: | Directory of Open Access Journals |
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