title: Chitosan-alunite composite: An effective dye remover with high sorption, regeneration and application potential.
abstract: This study was undertaken to prepare a novel and environmentally friendly composite for the use in the wastewater treatment process. This composite was produced by immobilizing alunite with a glucosamine biopolymer, chitosan. Batch and dynamic flow mode decolorization potential of the chitosan-alunite composite (CAC) was systematically evaluated in Acid Red 1 (AR1) and Reactive Red 2 (RR2) contaminated media. pH, sorbent dosage, contact time and flow rate were screened through the sorption experiments. Equilibrium sorption experiments indicated that CAC has very high sorption potential for RR2 and AR1 dyes with the maximum sorption capacities of 462.74 and 588.75 mg g(-1), respectively. Good regeneration and reuse potential in 20 consecutive cycles are other important advantages of this composite. More importantly, CAC could also be used in the treatment of real wastewater without performance decrease. Overall, this study suggests that CAC is a promising sorbent for the removal of anionic dyes from aqueous solutions.
authors.affiliation: Department of Chemistry, Faculty of Arts and Science, Eskişehir Osmangazi University, 26480 Eskişehir, Turkey. Electronic address: stunali@ogu.edu.tr.
authors.forename: Sibel Tunali
authors.initials: ST
authors.lastname: Akar
authors.affiliation: Department of Chemistry, Faculty of Arts and Science, Eskişehir Osmangazi University, 26480 Eskişehir, Turkey.
authors.forename: Elif
authors.initials: E
authors.lastname: San
authors.affiliation: Department of Chemistry, Faculty of Arts and Science, Eskişehir Osmangazi University, 26480 Eskişehir, Turkey.
authors.forename: Tamer
authors.initials: T
authors.lastname: Akar
mesh_terms: D000327:Adsorption; D017607:Aluminum Compounds / Q000737:chemistry*; D001391:Azo Compounds / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009282:Naphthalenesulfonates / Q000737:chemistry*; D017680:Potassium Compounds / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013431:Sulfates / Q000737:chemistry*; D013696:Temperature; D014227:Triazines / Q000737:chemistry*; D062065:Wastewater / Q000032:analysis
chemical_list: D017607:Aluminum Compounds; D001391:Azo Compounds; D048271:Chitosan; D004396:Coloring Agents; D009282:Naphthalenesulfonates; D017680:Potassium Compounds; D013431:Sulfates; D014227:Triazines; D062065:Wastewater; C473131:alunite; C098610:reactive red 2
keywords: Acid Red 1 (AR1); Alunite; Chitosan; Composite; Reactive Red 2 (RR2); Sorption