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Titolo:
Interlamellar adsorption of organic pollutants in hydrophobic montmorillonite
Autore:
Farkas, A; Dekany, I;
Indirizzi:
Univ Szeged, Dept Colloid Chem, H-6720 Szeged, Hungary Univ Szeged Szeged Hungary H-6720 t Colloid Chem, H-6720 Szeged, Hungary Hungarian Acad Sci, Nanostruct Mat Res Grp, H-6720 Szeged, Hungary Hungarian Acad Sci Szeged Hungary H-6720 Res Grp, H-6720 Szeged, Hungary
Titolo Testata:
COLLOID AND POLYMER SCIENCE
fascicolo: 5, volume: 279, anno: 2001,
pagine: 459 - 467
SICI:
0303-402X(200105)279:5<459:IAOOPI>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXCESS ISOTHERMS; AQUEOUS-SOLUTION; LIQUID-MIXTURES; CLAY-MINERALS; SURFACES; WATER; SILICATES; CAPACITY; LAYER;
Keywords:
clays; montmorillonite; adsorption; pollutants; hydrophobic surface;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Dekany, I Univ Szeged, Dept Colloid Chem, Aradi V T 1, H-6720 Szeged, Hungary Univ Szeged Aradi V T 1 Szeged Hungary H-6720 0 Szeged, Hungary
Citazione:
A. Farkas e I. Dekany, "Interlamellar adsorption of organic pollutants in hydrophobic montmorillonite", COLLOID P S, 279(5), 2001, pp. 459-467

Abstract

The adsorption of nitrobenzene, 2-chlorophenol, and 4-chlorophenol from water on organophilized derivatives of n-hexadecylpyridinium-montmorillonite (HDP-montmorillonite) was studied. Adsorption excess isotherms were obtained by the immersion method and were analyzed to determine the adsorption capacity of organic pollutants on the hydrophobized surface. The basal spacings of the clay minerals were determined by X-ray diffraction. The results ofX-ray diffraction measurements are in good agreement with excess isotherms: whenever a region of the isotherm indicates an increase for the adsorption of organic component, an increase in basal spacing (interlamellar swelling) is also observed. By combining these two independent methods, composition and structure of the interlamellar space between the silicate layers could be accurately calculated. The free enthalpy of adsorption, the adsorptioncapacity, and the separation factor for adsorption are calculated by analyzing the adsorption isotherm on the basis of the Gibbs equation and Everett-Schay method. The results are utilizable for planning environmental procedures and systems (water clarification and soil remediation).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/11/17 alle ore 03:44:33