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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
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2006 (Engelska)Ingår i: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 301, nr 2, s. 402-408Artikel i tidskrift (Refereegranskat) 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).

Ort, förlag, år, upplaga, sidor
2006. Vol. 301, nr 2, s. 402-408
Nyckelord [en]
adsorption, magnetite, platinum group metals, nanoparticles, metal distributions, titanium-dioxide, gamma-alumina, adsorption, preconcentration, complexes, catalysts, resin, ph, speciation
Nationell ämneskategori
Materialkemi
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
Anmärkning

QC 20100525

Tillgänglig från: 2010-08-05 Skapad: 2010-08-05 Senast uppdaterad: 2022-10-24Bibliografiskt granskad
Ingår i avhandling
1. Selective Separation of Metal Ions by Solvent Extraction, Liquid Membranes and Magnetic Nanoparticles
Öppna denna publikation i ny flik eller fönster >>Selective Separation of Metal Ions by Solvent Extraction, Liquid Membranes and Magnetic Nanoparticles
2006 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Ort, förlag, år, upplaga, sidor
Stockholm: KTH, 2006. s. xvi, 50
Nyckelord
solvent extraction, facilitated transport, Pt(IV), Pd(II), Ph(III), permeation medelling, thermodynamic modelling
Nationell ämneskategori
Materialkemi
Identifikatorer
urn:nbn:se:kth:diva-3871 (URN)91-7178-281-8 (ISBN)
Disputation
2006-03-17, Salongen, KTHB, Osquars backe 31, Stockholm, 10:00
Opponent
Handledare
Anmärkning

QC 20100924

Tillgänglig från: 2006-03-08 Skapad: 2006-03-08 Senast uppdaterad: 2022-10-24Bibliografiskt granskad

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Uheida, AbdusalamZhang, YuMuhammed, Mamoun
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