Equilibrium and kinetic data and process design for adsorption of Congo Red onto bentonite.
The adsorption of Congo Red onto bentonite in a batch adsorber has been studied. Four kinetic models, the pseudo first- and second-order equations, the Elovich equation and the intraparticle diffusion equation, were selected to follow the adsorption process. Kinetic parameters; rate constants, equilibrium adsorption capacities and correlation coefficients, for each kinetic equation were calculated and discussed. It was shown that the adsorption of Congo Red onto bentonite could be described by the pseudo second-order equation. The experimental isotherm data were analyzed using the Langmuir, Freundlich and Temkin equations. Adsorption of Congo Red onto bentonite followed the Langmuir isotherm. A single stage batch adsorber was designed for different adsorbent mass/treated effluent volume ratios using the Langmuir isotherm.
Department of Chemistry, Science & Arts Faculty, Sakarya University, 54187 Sakarya, Turkey.
Emrah
E
Bulut
Mahmut
M
Ozacar
I Ayhan
IA
Sengil
D000327:Adsorption; D001546:Bentonite / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D003224:Congo Red / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D004396:Coloring Agents; D014874:Water Pollutants, Chemical; D001546:Bentonite; D003224:Congo Red