Chromium adsorption in olive stone activated carbon
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In this work, Cr(III) adsorption on activated carbon obtained from olive stones in an upflow fixed-bed column at 30∘C was studied. The flow rate influence on the breakthrough curves at a feed concentration of 0.87 meq/L was investigated in an attempt to minimize the diffusional resistances. Breakthrough curves for a flow range of 2–8 mL/min were obtained at 10.5 cm bed height and inlet diameter of 0.9 cm. The mass transfer parameters indicated that the bed minimal resistance was attained at 2 mL/min. Therefore, the data equilibrium was carried out until the bed was saturated at 2 mL/min. The dynamic system generated a favorable isotherm with a maximum chromium uptake of 0.45 meq/g. A column sorption mathematical model was created considering the axial dispersion in the column and the intraparticle diffusion rate-controlling steps. The isotherm was successfully modeled by the Langmuir equation and the mathematical model described the experimental dynamic data adequately for feed concentrations from 0.26 to 3.29 meq/L.
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- Chromium adsorption in olive stone activated carbon
Volume 12, Issue 2 , pp 155-162
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers
- Additional Links
- Activated carbon
- Olive stones
- Industry Sectors
- Author Affiliations
- 1. Departamento de Engenharia Química, Universidade Estadual de Maringá, Av. Colombo 5790 Bl. D-90, CEP 87020-900, Maringá, Pr, Brazil
- 2. Departamento de Engenharia Química, Universidade do Oeste do Paraná, Rua Faculdade, 645 Jardim La Salle, C.P. 520, CEP 85903-000, Toledo, Pr, Brazil
- 3. Centro de Química Fina e Biotecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
- 4. Facultad de Ciencias Químicas, Universidad de Concepción, Casilla 160-C, Concepción, Chile