Removal of Reactive Orange 107 Dye from Aqueous Solution by Activated Carbon from Pinus elliottii Sawdust: a Response Surface Methodology Study
| Autor: | Cheryl Almeida, Karin Cristiane Justi, Maria Lurdes Felsner, J. M. Dos Santos |
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| Rok vydání: | 2016 |
| Předmět: |
Langmuir
Environmental Engineering chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences symbols.namesake Adsorption medicine Environmental Chemistry Organic chemistry Freundlich equation Water Science and Technology Aqueous solution Ecological Modeling Langmuir adsorption model 021001 nanoscience & nanotechnology Pollution 0104 chemical sciences chemistry visual_art symbols visual_art.visual_art_medium Sawdust 0210 nano-technology Carbon Activated carbon medicine.drug Nuclear chemistry |
| Zdroj: | Water, Air, & Soil Pollution. 227 |
| ISSN: | 1573-2932 0049-6979 |
| DOI: | 10.1007/s11270-016-3003-z |
| Popis: | Adsorption of Reactive Orange 107 dye from aqueous solution was investigated using an activated carbon from Pinus elliottii sawdust chemically prepared with ZnCl2. The optimum conditions for the adsorption of Reactive Orange 107 dye by the activated carbon, obtained by response surface methodology, were pH = 10, ionic strength = 0.4 mol L−1, agitation rate = 200 rpm, and adsorbent dosage = 0.025 g. For the experimental data of the adsorption equilibrium, nonlinear models, i.e., the Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin isotherms, were applied; the best correlation was found for the Langmuir model. The thermodynamic parameters were determined using the adsorption equilibrium constant of the Langmuir isotherm and the van ‘t Hoff equation. The parameters suggest an endothermic, ∆H°ads = 16.97 kJ mol−1, and spontaneous process, ∆G°ads = −23.96, −25.23, −26.78, and −28.05 kJ mol−1, at 298, 308, 318, and 328 K, respectively. The results indicate that the activated carbon was efficient for the adsorption of Reactive Orange 107 and has excellent potential for the treatment of colored effluents. |
| Databáze: | OpenAIRE |
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