Activated carbon-alginate beads impregnated with surfactant as sustainable adsorbent for efficient removal of methylene blue

Noor Ul Alamin, Amir Sada Khan, Asma Nasrullah, Jibran Iqbal, Zahoor Ullah, israf ud din, Nawshad Muhammad, Shahan Zeb Khan

Research output: Contribution to journalJournal articlepeer-review

3 Scopus citations

Abstract

A cost-effective and sustainable Calligonum polygonoides biomass based activated carbon (AC) was synthesized. The prepared AC was utilized in the fabrication of carbon-alginate beads for the adsorption of methylene blue (MB) textile dye from aqueous solution. The surface morphology, surface functional groups, elemental analysis and thermal behavior of the prepared beads were investigated using different analytical techniques. Batch adsorption experiments were performed to investigate the adsorption capacity of the beads. Effect of different parameters such as initial pH of MB solution, dose of adsorbent, contact time, initial concentration of MB and temperature were evaluated. The kinetic studies identified pseudo-second order model. Langmuir and Freundlich isotherm models were applied and fitted to the experimental equilibrium data. The beads showed a maximum adsorption capacity of 769 mg/g in basic pH at 30 °C while using 400 mg·L−1 of MB solution. The adsorption process was found to be endothermic and spontaneous as confirmed by the thermodynamic data. The fabricated beads were subjected to recycling which exhibited same adsorption efficiency after six regeneration cycles. The results showed that the AC-alginate beads impregnated with SDS have high adsorption capability and would be used for the efficient removal of cationic dyes from wastewater.

Original languageEnglish
Pages (from-to)233-243
Number of pages11
JournalInternational Journal of Biological Macromolecules
Volume176
DOIs
StatePublished - 15 Apr 2021

Keywords

  • Activated carbon
  • Adsorption, methylene blue
  • Alginate
  • Sodium dodecyl sulphate

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