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Sorption of palladium(II), rhodium(III), and platinum(IV) on Fe3O4 nanoparticles
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
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2006 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 301, no 2, 402-408 p.Article in journal (Refereed) 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).

Place, publisher, year, edition, pages
2006. Vol. 301, no 2, 402-408 p.
Keyword [en]
adsorption, magnetite, platinum group metals, nanoparticles, metal distributions, titanium-dioxide, gamma-alumina, adsorption, preconcentration, complexes, catalysts, resin, ph, speciation
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-15934DOI: 10.1016/j.jcis.2006.05.015ISI: 000239937700008Scopus ID: 2-s2.0-33746919631OAI: oai:DiVA.org:kth-15934DiVA: diva2:333976
Note

QC 20100525

Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-05-19Bibliographically approved
In thesis
1. Selective Separation of Metal Ions by Solvent Extraction, Liquid Membranes and Magnetic Nanoparticles
Open this publication in new window or tab >>Selective Separation of Metal Ions by Solvent Extraction, Liquid Membranes and Magnetic Nanoparticles
2006 (English)Doctoral thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2006. xvi, 50 p.
Keyword
solvent extraction, facilitated transport, Pt(IV), Pd(II), Ph(III), permeation medelling, thermodynamic modelling
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-3871 (URN)91-7178-218-8 (ISBN)
Public defence
2006-03-17, Salongen, KTHB, Osquars backe 31, Stockholm, 10:00
Opponent
Supervisors
Note
QC 20100924Available from: 2006-03-08 Created: 2006-03-08 Last updated: 2010-09-24Bibliographically approved

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