Structural characterisation and environmental application of organoclays for the removal of phenolic compounds

Yuri Park, Godwin A. Ayoko, E. Horváth, Róbert Kurdi, J. Kristóf, Ray L. Frost

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

Modified montmorillonite was prepared at different surfactant (HDTMA) loadings through ion exchange. The conformational arrangement of the loaded surfactants within the interlayer space of MMT was obtained by computational modelling. The conformational change of surfactant molecules enhance the visual understanding of the results obtained from characterization methods such as XRD and surface analysis of the organoclays. Batch experiments were carried out for the adsorption of p-chlorophenol (PCP) and different conditions (pH and temperature) were used in order to determine the optimum sorption. For comparison purpose, the experiments were repeated under the same conditions for p-nitrophenol (PNP). Langmuir and Freundlich equations were applied to the adsorption isotherm of PCP and PNP. The Freundlich isotherm model was found to be the best fit for both of the phenolic compounds. This involved multilayer adsorptions in the adsorption process. In particular, the binding affinity value of PNP was higher than that of PCP and this is attributable to their hydrophobicities. The adsorption of the phenolic compounds by organoclays intercalated with highly loaded surfactants was markedly improved possibly due to the fact that the intercalated surfactant molecules within the interlayer space contribute to the partition phases, which result in greater adsorption of the organic pollutants.

Original languageEnglish
Pages (from-to)319-334
Number of pages16
JournalJournal of Colloid and Interface Science
Volume393
Issue number1
DOIs
Publication statusPublished - Mar 1 2013

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Organoclay
Surface-Active Agents
Surface active agents
Adsorption
Bentonite
Molecules
Organic pollutants
Surface analysis
Hydrophobicity
Clay minerals
Adsorption isotherms
Isotherms
Sorption
Ion exchange
Multilayers
Experiments
4-nitrophenol
4-chlorophenol
Nitrophenols

Keywords

  • Adsorption
  • Application
  • Isotherms
  • Molecular mechanical modelling
  • PCP

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Colloid and Surface Chemistry

Cite this

Structural characterisation and environmental application of organoclays for the removal of phenolic compounds. / Park, Yuri; Ayoko, Godwin A.; Horváth, E.; Kurdi, Róbert; Kristóf, J.; Frost, Ray L.

In: Journal of Colloid and Interface Science, Vol. 393, No. 1, 01.03.2013, p. 319-334.

Research output: Contribution to journalArticle

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