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Sorption of palladium(II), rhodium(III), and platinum(IV) on Fe3O4 nanoparticles
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap.ORCID-id: 0000-0001-6288-7709
Vise andre og tillknytning
2006 (engelsk)Inngår i: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 301, nr 2, s. 402-408Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The adsorption of palladium(II), rhodium(III), and platinum(IV) from diluted hydrochloric acid solutions onto Fe3O4 nanoparticles has been investigated. The parameters studied include the contact time and the concentrations of metals and other solutes such as H+ and chloride. The equilibrium time was reached in less than 20 min for all metals. The maximum loading capacity of Fe3O4 nanoparticles for Pd(II), Rh(III), and Pt(IV) was determined to be 0.103, 0.149, and 0.068 mmol g(-1), respectively. A sorption mechanism for Pd(II), Rh(III), and Pt(IV) has been proposed and their conditional adsorption equilibrium constants have been determined to be log K = 1.72, 1.69, and 1.84, respectively. Different compositions of eluting solution were tested for the recovery of Pt(IV), Pd(II), and Rh(III) from Fe3O4 nanoparticles. It was found that 0.5 mol L-1 HNO3 can elute all of the metal ions simultaneously, while 1 mol L-1 NaHSO3 was an effective eluting solution for Rh(III), and 0.5 mol L-1 NaClO4 for Pt(IV). In competitive adsorption, the nanoparticles showed stronger affinity for Rh(III) than for Pd(II) and Pt(IV).

sted, utgiver, år, opplag, sider
2006. Vol. 301, nr 2, s. 402-408
Emneord [en]
adsorption, magnetite, platinum group metals, nanoparticles, metal distributions, titanium-dioxide, gamma-alumina, adsorption, preconcentration, complexes, catalysts, resin, ph, speciation
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-15934DOI: 10.1016/j.jcis.2006.05.015ISI: 000239937700008PubMedID: 16780854Scopus ID: 2-s2.0-33746919631OAI: oai:DiVA.org:kth-15934DiVA, id: diva2:333976
Merknad

QC 20100525

Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 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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