Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution. 28. Formation of Soluble Silicic Acid--Ligand Complexes as Studied by Potentiometric and Solubility Measurements.

Artigo Acesso aberto Revisado por pares

Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution. 28. Formation of Soluble Silicic Acid--Ligand Complexes as Studied by Potentiometric and Solubility Measurements.

1991; Royal Society of Chemistry; Volume: 45; Linguagem: Inglês

10.3891/acta.chem.scand.45-0335

ISSN

1902-3103

Autores

Lars-Olof Öhman, Agneta Nordin, Iran Fattahpour Sedeh, Staffan Sjöberg, Katri Laihia, Erich Kleinpeter,

Tópico(s)

Adsorption and biosorption for pollutant removal

Resumo

Amorphous silica solubilities in the presence of organic (mannitol, oxalate, citrate, catechol) and inorganic (SO 4 2− ) ligands have been studied in 0.6 M Na(Cl) medium at 25 o C. Apart from the catechol system, the experiments were performed at neutral pH with an equivalent ligand concentration of ≤0.6 M. In the presence of mannitol, the solubility of SiO 2 (am) was found to decrease with increasing ligand concentration. With oxalate, citrate and sulphate, an increased solubility was observed

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Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution. 28. Formation of Soluble Silicic Acid--Ligand Complexes as Studied by Potentiometric and Solubility Measurements.