title: Kinetics of Remazol Black B adsorption onto carbon prepared from sugar beet pulp.
abstract: Dried sugar beet pulp, an agricultural solid waste, was used for the production of carbon. Carbonised beet pulp was tested in the adsorption of Remazol Black B dye, and adsorption studies with real textile wastewater were also performed. Batch kinetic studies showed that an equilibrium time of 180 min was needed for the adsorption. The maximum dye adsorption capacity was obtained as 80.0 mg g(-1) at the temperature of 25 °C at pH = 1.0. The Langmuir and Freundlich adsorption models were used for the mathematical description of the adsorption equilibrium, and it was reported that experimental data fitted very well to the Langmuir model. Mass transfer and kinetic models were applied to the experimental data to examine the mechanisms of adsorption and potential rate-controlling steps. It was found that both external mass transfer and intraparticle diffusion played an important role in the adsorption mechanisms of dye, and adsorption kinetics followed the pseudo-second-order type kinetic model. The thermodynamic analysis indicated that the sorption process was exothermic and spontaneous in nature.
authors.affiliation: Department of Environmental Engineering, Firat University, 23100 Elazig, Turkey. aydursun@firat.edu.tr
authors.forename: Arzu Y
authors.initials: AY
authors.lastname: Dursun
authors.forename: Ozlem
authors.initials: O
authors.lastname: Tepe
authors.forename: Gülşad
authors.initials: G
authors.lastname: Uslu
authors.forename: Gülbeyi
authors.initials: G
authors.lastname: Dursun
authors.forename: Yusuf
authors.initials: Y
authors.lastname: Saatci
mesh_terms: D000327:Adsorption; D027461:Beta vulgaris / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008956:Models, Chemical; D009282:Naphthalenesulfonates / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry; D013783:Textile Industry; D013816:Thermodynamics; D013997:Time Factors; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D002244:Carbon; D004396:Coloring Agents; D009282:Naphthalenesulfonates; D062065:Wastewater; D014874:Water Pollutants, Chemical; C063421:Remazol black B