Chromium(VI) Removal from Aqueous Solution by Magnetite Coated by a Polymeric Ionic Liquid-Based Adsorbent
2017; Multidisciplinary Digital Publishing Institute; Volume: 10; Issue: 5 Linguagem: Inglês
10.3390/ma10050502
ISSN1996-1944
AutoresT. Alexandra Ferreira, José A. Rodrı́guez, María Elena Páez-Hernández, Alfredo Guevara, E. Barrado, Prisciliano Hernández,
Tópico(s)Analytical chemistry methods development
ResumoAn evaluation of the chromium(VI) adsorption capacity of four magnetite sorbents coated with a polymer phase containing polymethacrylic acid or polyallyl-3-methylimidazolium is presented. Factors that influence the chromium(VI) removal such as solution pH and contact time were investigated in batch experiments and in stirred tank reactor mode. Affinity and rate constants increased with the molar ratio of the imidazolium. The highest adsorption was obtained at pH 2.0 due to the contribution of electrostatic interactions.
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