Selective adsorption of uranium (VI) on NaHCO3 leached composite γ-methacryloxypropyltrimethoxysilane coated magnetic ion-imprinted polymers prepared by precipitation polymerization

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dc.citation.doi10.17159/0379-4350/2015/v68a10en_ZA
dc.citation.epage68en_ZA
dc.citation.spage61en_ZA
dc.contributor.authorTavengwa, N.T.
dc.contributor.authorCukrowska, E.
dc.contributor.authorChimuka, L.
dc.date.accessioned2016-11-21T15:00:10Z
dc.date.available2016-11-21T15:00:10Z
dc.date.issued2015
dc.description.abstractIon imprinted nano-magnetic composite polymers for selective removal of hexavalent uranium were prepared by a precipitation polymerization technique in the presence of γ-methacryloxypropyltrimethoxysilane (γ-MPS) coated magnetite and other pre-polymerization reagents. The synthesized magnetic polymers were then leached with NaHCO3 to produce magnetic ion imprinted polymers (IIPs) with fabricated adsorption sites complementary to the uranyl ions in terms of size and shape. Several parameters were investigated to obtain conditions which gave the optimum adsorption of the uranyl onto the magnetic IIPs and their corresponding controls, magnetic ion non-imprinted polymers (NIPs). The optimum amount of magnetic sorbent, initial concentration and contact time were 50 mg, 2.5 mg L-1 and 45 min, respectively. The adsorption capacity of the magnetic IIP (1.15 ± 0.01 mg g-1) was higher than that of the magnetic NIP (0.93 ± 0.02 mg g-1). This indicated that the former had a somewhat higher affinity for U(VI) than the later. The magnetic polymers also displayed good selectivity of the order: U(VI) > Ni(II) > Mg(II). After six cycles of use, the magnetic polymers illustrated good stability and reusability.en_ZA
dc.description.librarianSP2016en_ZA
dc.identifier.citationTavengwa, N.T., Cukrowska, E. and Chimuka, L. 2015. Selective adsorption of uranium (VI) on NaHCO3 leached composite γ-methacryloxypropyltrimethoxysilane coated magnetic ion-imprinted polymers prepared by precipitation polymerization. South African Journal of Chemistry 68, pp.61-68.en_ZA
dc.identifier.issn0379-4350 (Print)
dc.identifier.issn1996-840X (Online)
dc.identifier.urihttp://hdl.handle.net/10539/21465
dc.journal.titleSouth African Journal of Chemistryen_ZA
dc.journal.volume68en_ZA
dc.language.isoenen_ZA
dc.publisherSouth African Chemical Instituteen_ZA
dc.subjectComplex matricesen_ZA
dc.subjectMagnetic ion imprinted polymersen_ZA
dc.subjectPrecipitationen_ZA
dc.subjectSelectivityen_ZA
dc.subjectUraniumen_ZA
dc.titleSelective adsorption of uranium (VI) on NaHCO3 leached composite γ-methacryloxypropyltrimethoxysilane coated magnetic ion-imprinted polymers prepared by precipitation polymerizationen_ZA
dc.typeArticleen_ZA
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