Szerves szennyezok interlamelláris adszorpciója organofilizált montmorillonit-adszorbensen

Translated title of the contribution: Interlamellar adsorption of organic pollutants on organophilized montmorillonite

András Farkas, I. Dékány

Research output: Contribution to journalArticle

Abstract

The sorption of nitrobenzene, 2-chloro-phenol and 4-chloro-phenol from water on hydrophobic montmorillonite was studied. Excess adsorption isotherms were obtained by the immersion method. The basal spacings of the clay mineral were determined by X-ray diffraction. Positive adsorption of the organic components is observed in the whole range of compositions (up to x1,r = 1). The results of X-ray diffraction measurements are in good agreement with the excess isotherms: whenever a region of the isotherm indicates an increase of the organic component, an increase in basal spacing is also observed. By combining these two independent methods, the composition and structure of the interlamellar space could be accurately calculated. The free enthalpy change of adsorption and the adsorption capacity is calculated by analyzing the adsorption isotherm on the basis of the Gibbs equation and Everett-Schay method. The results are utilizable for the planning of environmental procedures and systems (water purification, soil remediation). Within the organocomplexes of well-ordered structure, basal spacings range from 3.06 to 3.65 nm, depending on the structure of the pollutant and the adsorbed material.

Original languageHungarian
Pages (from-to)466-475
Number of pages10
JournalMagyar Kemiai Folyoirat, Kemiai Kozlemenyek
Volume107
Issue number11
Publication statusPublished - Nov 2001

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Bentonite
Organic pollutants
Phenol
Adsorption isotherms
Adsorption
Isotherms
X ray diffraction
Water
Clay minerals
Remediation
Chemical analysis
Purification
Sorption
Enthalpy
Soils
Planning

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Szerves szennyezok interlamelláris adszorpciója organofilizált montmorillonit-adszorbensen. / Farkas, András; Dékány, I.

In: Magyar Kemiai Folyoirat, Kemiai Kozlemenyek, Vol. 107, No. 11, 11.2001, p. 466-475.

Research output: Contribution to journalArticle

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