- Title
- The development of palladium (II)-specific amine-functionalized silica-based microparticles
- Creator
- Fayemi, Omolola E, Ogunlaja, Adeniyi S, Antunes, Edith M, Nyokong, Tebello, Tshentu, Zenixole R
- Subject
- To be catalogued
- Date
- 2015
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/241083
- Identifier
- vital:50903
- Identifier
- xlink:href="https://doi.org/10.1080/01496395.2014.978017"
- Description
- The adsorption and separation of platinum(IV) and palladium(II) chlorido species ([PtCl6]2− and [PdCl4]2−) on silica-based microparticles functionalized with ammonium centers based on ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetriamine (TETA) and tris-(2-aminoethyl)amine (TAEA) were investigated. The functionalized sorbent materials were characterized using SEM, XPS, BET, and FTIR. The sorbents were used in the batch and column study for adsorption and selective separation of [PtCl62− and PdCl4]2−. The adsorption model for both [PtCl6]2− and [PdCl4]2− on the different sorbent materials fitted the Freundlich isotherm with R2 values > 0.99. The S-TETA sorbent material was palladium(II) specific. Pd(II) loaded on the silica column was recovered using 3% m/v thiourea solution as the eluting agent. Separation of platinum and palladium was achieved by selective stripping of [PtCl6]2− with 0.5 M of NaClO4 in 1.0 M HCl while Pd(II) was eluted with 0.5 M thiourea in 1.0 M HCl. The separation of palladium (Pd) from a mixture containing platinum (Pt), iridium (Ir), and rhodium (Rh) was successful on silica functionalized with triethylenetriamine (TETA) showing specificity for palladium(II) and a loading capacity of 0.27 mg/g. S-TETA showed potential for use in the recovery of palladium from platinum group metals such as from solutions of worn out automobile emission control catalytic convertors and other secondary sources.
- Format
- computer, online resource, application/pdf, 1 online resource (10 pages), pdf
- Publisher
- Taylor and Francis Online
- Language
- English
- Relation
- Separation Science and Technology, Fayemi, O.E., Ogunlaja, A.S., Antunes, E., Nyokong, T. and Tshentu, Z.R., 2015. The development of palladium (II)-specific amine-functionalized silica-based microparticles: adsorption and column separation studies. Separation Science and Technology, 50(10), pp.1497-1506, Separation Science and Technology volume 50 number 10 p. 1497 2015 1520-5754
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Taylor and Francis Online Terms and Conditions Statement (https://www.tandfonline.com/terms-and-conditions)
- Rights
- Open Access
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Collections
Tshentu, Zenixole Richman (Dr)
Antunes, Edith Martins (Dr)
Nyokong, Tebello (Distinguished Professor)
RU DST/NRF SARChI for Medicinal Chemistry and Nanotechnology
RU Department of Chemistry
SDG 03. Good Health and Well-Being
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|---|---|---|---|---|---|---|---|
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