Dynamic isotherms of dye in activated carbon
AUTOR(ES)
Matta, Gleisy Kelly Lopes, Barros, Maria Angélica Simões Dornelas, Lambrecht, Rafael, Silva, Edison Antonio da, Lima, Oswaldo Curty da Motta
FONTE
Materials Research
DATA DE PUBLICAÇÃO
2008-09
RESUMO
Textile industrial wastewaters have significant quantities of dyes. Adsorption processes using industrials rejects may help in the treatment of these effluents. In this context, uptake of Reactive Blue 5G dye by babassu coconut shell activated carbon was studied with upstream flow fixed-bed experiments. First, the minimum flow rate that minimizes the diffusion effects of 4 mL/min was chosen within the range investigated (2-10 mL/min). Then, the breakthrough curves were obtained for this flow rate for different initial dye concentrations (13.15102.0 mg/L) and temperature of 30 °C. The mass retained until bed saturation in each experiment was used to obtain the dynamic isotherms, which showed a favorable dye uptake behavior with a maximum adsorption capacity of 12.9 mg.g-1. The irreversible model fitted the experimental data well when compared to Langmuir and Freundlich models. A LDF model simulated the experimental breakthrough curves, and the bed axial dispersion and mass transfer coefficients were estimated.
Documentos Relacionados
- Activated carbon loaded with manganese and iron for glyphosate adsorption: Kinetics, isotherms and thermodynamic studies
- Removal of Pb(II) ions and malachite green dye from wastewater by activated carbon produced from lemon peel
- Dynamic simulation of the carbon-in-pulp and carbon-in-leach processes
- Survival of selected bacterial species in sterilized activated carbon filters and biological activated carbon filters.
- EVALUATION OF A DYNAMIC METHOD FOR CALIBRATION OF DYE DILUTION CURVES