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Author(s): Gabriela Ungureanu
Catalina Filote
Sílvia C. R. Santos
Rui A. R. Boaventura
Irina Volf
Cidália M. S. Botelho
Title: Antimony oxyanions uptake by green marine macroalgae
Issue Date: 2016
Abstract: The potential of green seaweeds, Cladophora sericea and Ulva rigida, to adsorb antimony(III) and antimony (V) from aqueous solution was studied in batch mode. The hydroxyl and carboxyl groups from the algae surface, responsible for Sb uptake, were quantified by potentiometric titration and a continuous model for the deprotonation of these sites was obtained. Kinetic studies using C. sericea as biosorbent were conducted using different initial Sb concentrations and solid/liquid ratios. A fast uptake process was observed with equilibrium being achieved in less than 2 h. Equilibrium studies show considerable adsorbed amounts for both Sb(III) and Sb(V). Maximum biosorption capacities, predicted by Langmuir model, were 2.1 mg/g, for Sb(III), and 3.1 mg/g for Sb(V), at pH 2 and 22 degrees C. A low influence of pH (range 2-8) and of ions typically present in natural waters were shown to be additional advantages of C. sericea, as a potential biosorbent for antimony.
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/UID/EQU/50020/2013- POCI-01-0145-FEDER-006984/Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais/LSRE-LCM
info:eu-repo/grantAgreement/Autoriadade de Gestão do Programa Operacional Regional do Norte/Programas Integrados de IC&DT/NORTE-07-0124-FEDER-000008/Environmental Technologies /LSRE/LCM LA - RL1_P3
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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