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Thermodynamic modeling of extraction equilibria of platinum and palladium with nonylthiourea from hydrochloric acid media
KTH, Tidigare Institutioner (före 2005), Materialvetenskap.ORCID-id: 0000-0001-6288-7709
KTH, Tidigare Institutioner (före 2005), Materialvetenskap.
KTH, Tidigare Institutioner (före 2005), Materialvetenskap.ORCID-id: 0000-0003-4976-862X
2004 (engelsk)Inngår i: Separation science and technology (Print), ISSN 0149-6395, E-ISSN 1520-5754, Vol. 39, nr 15, s. 3665-3677Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Models of extraction equilibria of Pt(IV) and Pd(II) with Nonylthiourea (NTH) from HCl media have been studied. The conditional equilibrium constants and the stoichiometry of the extracted species of Pt(IV) with NTH at different ionic strengths obtained by numerical analysis using the LETAGROP-DISTR program are reported. The dependence of the extraction constant values on the ionic strength has been analysed using the Specific Interaction Theory (SIT), from which the respective thermodynamic equilibrium constants of the extraction of Pt(IV) and Pd(II) with NTH have been determined. The thermodynamic equilibrium constants determined for Pt(IV) are log K-11o=5+/-1 and log K-14(o)=14.6+/-0.2, while for Pd(II) log K-11(o)=4.9+/-0.1 and log K-12(o)=9.17+/-0.08. The interaction coefficients, epsilon, for the pairs (H+, PtCl62-) and (H+, PdCl42-) have also been estimated to be 0.30+/-0.08 and 0.41+/-0.02, respectively.

sted, utgiver, år, opplag, sider
2004. Vol. 39, nr 15, s. 3665-3677
Emneord [en]
platinum, palladium, thermodynamic modeling, aqueous-solutions, electrolytes
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-23916DOI: 10.1081/ss-200039123ISI: 000225404100012Scopus ID: 2-s2.0-9144256366OAI: oai:DiVA.org:kth-23916DiVA, id: diva2:342615
Merknad
QC 20100525 QC 20110914Tilgjengelig fra: 2010-08-10 Laget: 2010-08-10 Sist oppdatert: 2022-10-24bibliografisk kontrollert
Inngår i avhandling
1. Selective Separation of Metal Ions by Solvent Extraction, Liquid Membranes and Magnetic Nanoparticles
Åpne denne publikasjonen i ny fane eller vindu >>Selective Separation of Metal Ions by Solvent Extraction, Liquid Membranes and Magnetic Nanoparticles
2006 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Stockholm: KTH, 2006. s. xvi, 50
Emneord
solvent extraction, facilitated transport, Pt(IV), Pd(II), Ph(III), permeation medelling, thermodynamic modelling
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-3871 (URN)91-7178-281-8 (ISBN)
Disputas
2006-03-17, Salongen, KTHB, Osquars backe 31, Stockholm, 10:00
Opponent
Veileder
Merknad

QC 20100924

Tilgjengelig fra: 2006-03-08 Laget: 2006-03-08 Sist oppdatert: 2022-10-24bibliografisk kontrollert

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