RSM-CCD optimized sodium alginate/gelatin based ZnS-nanocomposite hydrogel for the effective removal of biebrich scarlet and crystal violet dyes

Int J Biol Macromol. 2019 May 15:129:214-226. doi: 10.1016/j.ijbiomac.2019.02.034. Epub 2019 Feb 6.

Abstract

The present work represents RSM-CCD (Response Surface Methodology integrated Central composite Design) optimized synthesis scheme of semi-IPN (semi interpenetrating network) NaAla-Gel-cl-polyAAm and ZnS nanocomposite adsorbent NaAla-Gel-cl-polyAAm/ZnS. Under optimized reaction parameters semi-IPN NaAla-Gel-cl-polyAAm showed maximum swelling percentage of 3191.73%. Maximum dye removal percentage (97.37%) was observed with ZnS nanocomposite for the removal of biebrich scarlet. The adsorption isotherm data indicated that Langmuir and Freundlich adsorption isotherm fitted well for biebrich scarlet (R2 = 0.964) and crystal violet (R2 = 0.960), respectively. ΔG°, ΔH° and ΔS° values indicated the thermodynamic feasibility of the reaction. Excellent recyclability and reusability of the adsorbent materials suggested their applicability towards textile industry and water purification purpose.

Keywords: Crosslinked; Nanocomposite; RSM-CCD; Semi-IPN.

MeSH terms

  • Adsorption
  • Alginates* / chemistry
  • Algorithms
  • Azo Compounds / chemistry*
  • Gelatin* / chemistry
  • Gentian Violet / chemistry*
  • Hydrogels* / chemistry
  • Models, Theoretical
  • Nanocomposites* / chemistry
  • Nanocomposites* / ultrastructure
  • Naphthols / chemistry*
  • Spectrum Analysis
  • Sulfides* / chemistry
  • Thermodynamics
  • Zinc Compounds* / chemistry

Substances

  • Alginates
  • Azo Compounds
  • Hydrogels
  • Naphthols
  • Sulfides
  • Zinc Compounds
  • Biebrich Scarlet
  • Gelatin
  • Gentian Violet
  • zinc sulfide