Uptake of phenol from aqueous solutions by adsorption in a Pinus pinaster bark packed bed
| Autor: | S. Freire, Gervasio Antorrena, Ramona Alonso, Gonzalo Vázquez, Julia González-Álvarez |
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| Rok vydání: | 2006 |
| Předmět: |
Time Factors
Environmental Engineering Health Toxicology and Mutagenesis Analytical chemistry Chromatography Affinity chemistry.chemical_compound Adsorption Environmental Chemistry Phenol Phenols Waste Management and Disposal Packed bed Chromatography Aqueous solution Chemistry Pinus Pollution Volumetric flow rate Solutions Kinetics visual_art Plant Bark visual_art.visual_art_medium Bark Dispersion (chemistry) |
| Zdroj: | Journal of Hazardous Materials. 133:61-67 |
| ISSN: | 0304-3894 |
| Popis: | The adsorption of phenol from aqueous solutions using a column packed with pre-treated Pinus pinaster bark was studied. The influence of the inlet phenol concentration (0.01 or 0.1 g/L) and the flow rate (6, 15.6 or 30 mL/min) on the breakthrough curves was analysed. An increase in the flow rate, decreased the time necessary to reach the breakthrough point and, for the highest inlet concentration, the dynamic capacity of the bed, from 7.5 to 0.4 min and from 0.38 to 0.15 mg phenol/g o.d. bark, respectively, at 0.1 g/L. The LUB Design Approach was used to determine the equivalent length of unused bed. The lower LUB values, which imply a better utilization of the bark bed, were obtained at the higher flow rate. A model which considered the effect of axial dispersion was successfully used to describe the fixed-bed operation behaviour for the lower flow rates. For the lowest inlet phenol concentration, the axial dispersion coefficient increased significantly when the flow rate increased. |
| Databáze: | OpenAIRE |
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