1990
DOI: 10.1346/ccmn.1990.0380306
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Use of Inorgano-Organo-Clays in the Removal of Priority Pollutants from Industrial Wastewaters: Structural Aspects

Abstract: Abstract--Novel modified clay adsorbents were prepared by blocking cation-exchange sites of an expandable clay, such as montmorillonite, with polymeric or polyvalent inorganic ions and by using cationic surfactants as sources of surface organic carbon. Eleetrokinetic measurements demonstrated that the adsorbed polycations were essentially nonexchangeable. Adsorption and desorption experiments revealed that about 90% of the cationic surfactant was apparently irreversibly bound to the surface. Flocculation and p… Show more

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Cited by 92 publications
(39 citation statements)
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“…In order to compare the intrinsic affinity of the adsorbent towards the adsorbate, one needs to replot the isotherms with regard to the degree of undersaturation, Ln(Ce / Cs), for reasons already mentioned. Figure 4B obtained by Srinivasan and Fogler (1990b) for PCP adsorption on Alia montmorillonite modified by coadsorption of a cationic surfactant. In order to obtain a better understanding of the PCP adsorption mechanisms, it was necessary to replot the isotherms relative to the degree of undersaturation, as shown in Figure 5B.…”
Section: Influence Of Ph On Pentachlorophenol Adsorptionmentioning
confidence: 99%
“…In order to compare the intrinsic affinity of the adsorbent towards the adsorbate, one needs to replot the isotherms with regard to the degree of undersaturation, Ln(Ce / Cs), for reasons already mentioned. Figure 4B obtained by Srinivasan and Fogler (1990b) for PCP adsorption on Alia montmorillonite modified by coadsorption of a cationic surfactant. In order to obtain a better understanding of the PCP adsorption mechanisms, it was necessary to replot the isotherms relative to the degree of undersaturation, as shown in Figure 5B.…”
Section: Influence Of Ph On Pentachlorophenol Adsorptionmentioning
confidence: 99%
“…Organoclay can be created by exchanging the hydrated exchangeable cations of clay (usually bentonite) with various types of quaternary ammonium cations (Xu et al 1997) or by other techniques (Srinivasan and Fogler 1990;Lo 1992). Due to the isomorphous substitutions in the aluminosilicate layers, natural clay minerals usually have a net negative charge, which is balanced by alkali metal…”
Section: Adsorptional Characters Of Clay Samplesmentioning
confidence: 99%
“…21 adsorption process. [1][2][3][4][5][6][7][8][9][10][11][12] The complexation of mercury at the surface TZT-HDTA-clay is achieved by direct coordination with the ligand acting possibly as a unidentate towards one metal ion, involving sulfur and nitrogen atoms of the TZT molecules loaded on HDTA-clay surface.…”
Section: Isotherms Of Adsorption Preconcentration and Revovery Of Metmentioning
confidence: 99%
“…The montmorillonites are much more organophilic than the same crystals before exchange. 9,10 Numerous studies have been devoted to clay-organic complexes. However, only a small amount of data has been assembled out to study the quantitative aspects of adsorption of heavy metal ions from aqueous solutions by organo-clay minerals.…”
mentioning
confidence: 99%