Title: Magnetic biosorbent for removal of uranyl ions

Authors: Amanda P.G. Yamamura, Mitiko Yamaura, Caroline H. Costa

Addresses: Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN – SP), Av. Professor Lineu Prestes 2242, 05508-000 Sao Paulo, SP, Brasil. ' Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN – SP), Av. Professor Lineu Prestes 2242, 05508-000 Sao Paulo, SP, Brasil. ' Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN – SP), Av. Professor Lineu Prestes 2242, 05508-000 Sao Paulo, SP, Brasil

Abstract: In this work magnetic biosorbent, which consisted of sugarcane bagasse as polymeric matrix with magnetite nanoparticles, was prepared. This magnetic composite has the purpose to remove uranyl ions from aqueous effluents. This magnetic biosorbent have presented superparamagnetic properties. Variables of adsorption process of uranyl ions by magnetic biosorbent in nitric solutions were investigated, such as, time required for the uranium-magnetic bagasse biosorbent equilibrium in the interval from 20–90 min, pH in the intervals from 2–5 and 10, stirring speed from 240–500 rpm and biosorbent dose from 2–25 gL⁻¹ were investigated. Equilibrium isotherm was verified according to the Langmuir and Freundlich adsorption isotherm models.

Keywords: uranyl ions; adsorption; nanotechnology; magnetic biosorbents; superparamagnetism; magnetite nanoparticles; sugarcane bagasse; equilibrium isotherms; agroindustry; uranium; radioactive wastewater; Gibbs energy; Langmuir; Freundlich; modelling; wastewater treatment; aqueous effluents.

DOI: 10.1504/IJNEST.2011.039243

International Journal of Nuclear Energy Science and Technology, 2011 Vol.6 No.1, pp.8 - 16

Published online: 14 Feb 2015 *

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