| Journal: | Brazilian journal of chemical engineering |
| Database: | PERIÓDICA |
| System number: | 000308782 |
| ISSN: | 0104-6632 |
| Authors: | Moreira, R.F.P.M1 Soares, J.L Jose, H.J Rodrigues, A.E2 |
| Institutions: | 1Universidade Federal de Santa Catarina, Departamento de Engenharia Quimica e Engenharia de Alimentos, Florianopolis, Santa Catarina. Brasil 2Universidade do Porto, Faculdade de Engenharia, Porto. Portugal |
| Year: | 2001 |
| Season: | Sep |
| Volumen: | 18 |
| Number: | 3 |
| Pages: | 327-336 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | The thermodynamics and kinetics of adsorption of reactive dyes on high-ash char was studied. Equilibrium data were obtained using the static method with controlled agitation at temperatures in the range of 30 to 60ºC. The Langmuir isotherm model was used to describe the equilibrium of adsorption, and the equilibrium parameters, R L, in the range of 0 to 1 indicate favorable adsorption. The amount of dye adsorbed increased as temperature increased from 30 to 40ºC, but above 40ºC the increase in temperature resulted in a decrease in the amount of dye adsorbed. The kinetic data presented are for controlled agitation at 50 rpm and constant temperature with dye concentrations in the range of 10 ppm to50 ppm. The film mass transfer coefficient, Kf, and the effective diffusivity inside the particle, De, were fitted to the experimental data. The results indicate that internal diffusion governs the adsorption rate |
| Disciplines: | Química |
| Keyword: | Ingeniería química, Colorantes, Remoción quimica, Carbonizados, Carbón activado, Despigmentación |
| Keyword: | Chemistry, Chemical engineering, Dyes, Chemical removal, Char, Activated carbon, Color removal |
| Full text: | Texto completo (Ver HTML) |
