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Reference type: Journal
Authors: Tavengwa NT, Cukrowska E, Chimuka L
Article Title: Modeling of adsorption isotherms and kinetics of uranium sorption by magnetic ion imprinted polymers.
Publication date: 2016
Journal: Toxicological & Environmental Chemistry
Volume: 98
Issue: (1)
Page numbers: 1-12.
DOI: 10.1080/02772248.2015.1101109

Abstract: Application of magnetic U(VI) ion imprinted polymers (IIPs) coated on magnetic nanoparticles was investigated for pre-concentration and determination of U(VI) ions in aqueous solutions. The scanning electron micrographs revealed the microporosity of the adsorbent. Uranium leaching was successful as the energy-dispersive X-ray spectra showed. The Brunauer-Emmett-Teller (BET) surface area improved by more than 13-fold (83.1 and 6.2 m2 g-1 for the leached and unleached magnetic IIP, respectively). U(VI) uptake was optimized using batch experiments with parameters affecting the uptake performance, such as initial uranium concentration, pH, contact time, and adsorbent dose investigated. Pseudo-second-order kinetics and the Langmuir isotherm model best fitted the experimental data. The maximum adsorption capacity of uranium onto the activated magnetic IIP reached 5.4 mg g-1. The selectivity order was determined to be U(VI) > Ni(II) > Th(IV)
Template and target information: uranyl ion, U(VI)
Author keywords: complexation, uranium, Magnetic, imprinted polymers, arsenazo III dye


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