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.contributor.author Tavengwa, N.T.
dc.contributor.author Cukrowska, E.
dc.contributor.author Chimuka, L.
dc.date.accessioned 2016-11-21T15:00:10Z
dc.date.available 2016-11-21T15:00:10Z
dc.date.issued 2015
dc.identifier.citation Tavengwa, 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.issn 0379-4350 (Print)
dc.identifier.issn 1996-840X (Online)
dc.identifier.uri http://hdl.handle.net/10539/21465
dc.description.abstract Ion 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.language.iso en en_ZA
dc.publisher South African Chemical Institute en_ZA
dc.subject Complex matrices en_ZA
dc.subject Magnetic ion imprinted polymers en_ZA
dc.subject Precipitation en_ZA
dc.subject Selectivity en_ZA
dc.subject Uranium en_ZA
dc.title Selective adsorption of uranium (VI) on NaHCO3 leached composite γ-methacryloxypropyltrimethoxysilane coated magnetic ion-imprinted polymers prepared by precipitation polymerization en_ZA
dc.type Article en_ZA
dc.journal.volume 68 en_ZA
dc.journal.title South African Journal of Chemistry en_ZA
dc.description.librarian SP2016 en_ZA
dc.citation.doi 10.17159/0379-4350/2015/v68a10 en_ZA
dc.citation.epage 68 en_ZA
dc.citation.spage 61 en_ZA


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