Adsorption capacity of methylene blue, an organic pollutant, by montmorillonite clay

I. Feddal, Amina Ramdani, Safia Taleb, E. M. Gaigneaux, Narjès Harrouch Batis, NorEddine Ghaffour

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The isotherms and kinetics of the adsorption of a cationic dye in aqueous solution, methylene blue, on a local Algerian montmorillonite clay mineral (raw, sodium and thermally activated at 300 and 500°C) were determined experimentally. Various parameters influencing the adsorption were optimized, mainly solid-liquid contact time, mass of adsorbent, initial concentration of dye, pH of the solution and temperature. Results showed that the adsorption kinetics were fast: 30 min for the raw clay mineral, and 20 min for sodium clay mineral (SC) and thermally activated at 300°C, whereas with the clay mineral calcined at 500°C, the equilibrium was reached after 150 min only. The maximum adsorption capacity was reached at pH 6.6. Results deducted from the adsorption isotherms also showed that the retention follows the Langmuir model. In addition, it was found that the kinetics were in the order of 2 (K = 2.457 × 106 g/mg.h) for sodium clay and were limited by an intra-particle diffusion. SC was found to be a better adsorbent to remove methylene blue from industrial wastewater. © 2013 Balaban Desalination Publications. All rights reserved.
Original languageEnglish (US)
Pages (from-to)2654-2661
Number of pages8
JournalDesalination and Water Treatment
Volume52
Issue number13-15
DOIs
StatePublished - Nov 25 2013

ASJC Scopus subject areas

  • Pollution
  • Water Science and Technology
  • Ocean Engineering

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