Effective removal of cationic dyes from aqueous solution using gum ghatti-based biodegradable hydrogel

Hemant Mittal, Arjun Maity, Suprakas Sinha Ray

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)

Abstract

Biodegradable hydrogels of gum ghatti (Gg) with a co-polymer mixture of acrylamide (AAm) and methacrylic acid (MAA) (termed as Gg-cl-P(AAm- co-MAA)) were synthesised by microwave-assisted free radical graft co-polymerisation technique. The hydrogel polymer was characterized by FTIR, SEM, and Brunauer-Emmett-Teller techniques. The Gg-cl-P(AAm- co-MAA) hydrogel was studied as an adsorbent for the removal of methylene blue (MB) and methyl violet (MV) from aqueous solutions. Adsorption of both the dyes followed pseudo-second-order kinetics and Langmuir adsorption isotherm models. The hydrogel polymer adsorbed 98% of MB and 95% of MV from aqueous solution. The Gg-cl-P(AAm- co-MAA) maintained its original sorption capacity for three cycles of adsorption-desorption. Furthermore, the hydrogel polymer degraded fully within 50 days in soil compost. In summary, the Gg-cl-P(AAm- co-MAA) hydrogel could be a potential adsorbent for the remediation of dyes from industrial wastewater.

Original languageEnglish
Pages (from-to)8-20
Number of pages13
JournalInternational Journal of Biological Macromolecules
Volume79
DOIs
Publication statusPublished - 1 Aug 2015

Keywords

  • Adsorption
  • Biodegradation
  • Gum ghatti
  • Isotherms
  • Kinetics
  • Methyl violet
  • Methylene blue

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Economics and Econometrics
  • General Energy

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