Chitosan-alunite composite: An effective dye remover with high sorption, regeneration and application potential

AKAR S. , San E., AKAR T.

CARBOHYDRATE POLYMERS, vol.143, pp.318-326, 2016 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 143
  • Publication Date: 2016
  • Doi Number: 10.1016/j.carbpol.2016.01.066
  • Title of Journal : CARBOHYDRATE POLYMERS
  • Page Numbers: pp.318-326


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-alunit-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. (C) 2016 Elsevier Ltd. All rights reserved.