Adsorption kinetics of malachite green and methylene blue from aqueous solutions using surfactant-modified organoclays

Authors

  • Haseeb Ullah Department of Chemistry, Quaid-i-Azam University.p
  • Muhammad Nafees
  • Farhat Iqbal Department of Statistics, University of Balochistan, Quetta
  • Saifullah Awan
  • Afzal Shah Department of Chemistry, Quaid-i-Azam University.
  • Amir Waseem Department of Chemistry, Quaid-i-Azam University.

DOI:

https://doi.org/10.17344/acsi.2017.3285

Keywords:

Environmental remediation, organoclays, dyes, cationic surfactants, isotherm models

Abstract

The main objective of this research is to study the adsorption behaviour of malachite green and methylene blue dyes onto the surfactant modified natural clays.  The results of SEM, XRD, IR, and thermal analysis confirms the intercalation of organic moiety in to the clay. The adsorption results show that pseudo-first order kinetics best fitted for both the dyes adsorbed on organo-clay. The data also reveals that both dyes are in a good agreement with Langmuir isotherm in both types of modified clays. The value of separation factor, RL, from Langmuir equation and Freundlich constant, n, give an indication of favourable adsorption. The maximum adsorption capacity qm based on Langmuir model was found to be 294-303 mg/g at 25 ˚C, is in good agreement with the experimental values. 

Author Biography

Amir Waseem, Department of Chemistry, Quaid-i-Azam University.

Department of Chemistry, Quaid-i-Azam University.

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Published

16.06.2017

Issue

Vol. 64 No. 2 (2017)

Section

Chemical, biochemical and environmental engineering

License

Except where otherwise noted, articles in this journal are published under the Creative Commons Attribution 4.0 International License