Antimony Solubility and Speciation in Aqueous Sulphuric Acid Solutions at 298 K | Zendy

Casas Jesús M. | Zendy; Crisóstomo Gloria | Zendy; Cifuentes Luis | Zendy

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Antimony Solubility and Speciation in Aqueous Sulphuric Acid Solutions at 298 K

Author(s) -

Casas Jesús M.,

Crisóstomo Gloria,

Cifuentes Luis

Publication year - 2004

Publication title -

the canadian journal of chemical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.404

H-Index - 67

eISSN - 1939-019X

pISSN - 0008-4034

DOI - 10.1002/cjce.5450820122

Subject(s) - antimony , solubility , aqueous solution , chemistry , hydrogen peroxide , inorganic chemistry , solubility equilibrium , genetic algorithm , metal , equilibrium constant , organic chemistry , evolutionary biology , biology

This work is an experimental and theoretical study of antimony speciation and the solubility of Sb 2 O 5 , Sb 2 O 3 and Sb 2 (SO 4 ) 3 at 298 K in aqueous sulphuric acid solutions (0 to 6 kmol/m 3 ). A thermodynamic model was developed to quantify the solubility products and aqueous metal speciation. Main dissolved species were H 3 SbO 3(aq) and H 3 SbO 4(aq) . The solubility of antimony increases with increasing solution acidity and with the presence of hydrogen peroxide in the solution. The following standard equilibrium constants at 298 K were obtained: Log K 0 (Sb2O5) = 11.7±0.5, Log K 0 (Sb2O3) = 32±1, and Log K 0 (Sb2(SO4)3) = 55±2.

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