Adsorption of inorganic ions on alumina from salt solutions: Correlations of distribution coefficients with uptake of salt

Shiao, S.Y.; Meyer, Robert E.

doi:10.1016/0022-1902(81)80107-8

Cited by 15 publications

(5 citation statements)

References 9 publications

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“…As a result of the charge site, ions of opposite charge are attracted from the bulk of the solution with the resulting formation of two charged planes at the interface. While the first two types of interactions may contribute to retention of inorganic analyte ions on alumina (their contribution will be dependent on the chemical environment), the major factor in an aqueous environment is one of ion exchange (3,4,7,11,15,(17)(18)(19). In simplest terms this can be represented by dissociation equilibria, eq 1 and 2, which >Al-0-H <=t >A1+ O-H"…”

Section: Resultsmentioning

confidence: 99%

Liquid chromatographic separation of inorganic anions on an alumina column

Schmitt¹,

Pietrzyk²

1985

Anal. Chem.

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Section: Resultsmentioning

confidence: 99%

Liquid chromatographic separation of inorganic anions on an alumina column

Schmitt¹,

Pietrzyk²

1985

Anal. Chem.

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“…The description of the salt dependency of the σ 0 −pH curves of gibbsite, assuming that the charge is present at the edge faces, is only possible if ion pair formation of surface groups with electrolyte ions is taken into account. The idea of ion pair formation was suggested by Yates , and later applied by Davis et al For aluminum oxide the presence of weakly adsorbed electrolyte ions is supported experimentally. ,, As a result of the presence of ion pair formation, simultaneous adsorption of cations and anions can be expected in the PZC. For gibbsite, simultaneous adsorption of cations and anions has also been reported. ,, …”

Section: Modeling Gibbsite and Bayerite Datamentioning

confidence: 93%

Interfacial Charging Phenomena of Aluminum (Hydr)oxides

1999

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The interfacial charging of Al(OH)3 (gibbsite and bayerite) and Al2O3 has been studied. For Al(OH)3 it can be shown that the very strong variation in charging behavior for different preparations is related to the relative presence of differently reacting crystal planes. The edge faces of the hexagonal gibbsite crystals are proton reactive over the whole pH range, in contrast to the 001 plane, which is mainly uncharged below pH = 10. On this 001 face only doubly coordinated surface groups are found, in contrast to the edges which also have singly coordinated surface groups. The results are fully in agreement with the predictions of the Multi site complexation (MUSIC) model. The proton adsorption, electrolyte ion adsorption, and shift of the IEP of gibbsite and aluminum oxide have been modeled simultaneously. For gibbsite, the ion pair formation of Na is larger than that of Cl, as is evidenced by modeling the experimentally observed upward shift of the IEP and charge reversal at high electrolyte concentrations. All these experimental results can be satisfactorily modeled with the MUSIC model, including the experimental surface potential of aluminum oxide (ISFET).

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“…The existence of surface complexes of monovalent electrolyte ions has been demonstrated by determining the simultaneous adsorption of the electrolyte cations and anions in the PZC of an adsorbent (4)(5)(6)(7)(8).…”

Section: Introductionmentioning

confidence: 99%