Antimony oxyanions uptake by green marine macroalgae

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Gabriela Ungureanu (Author) FEUP; Catalina Filote (Author) Other; Sílvia C. R. Santos (Author) FEUP; Rui A. R. Boaventura (Author) FEUP; Irina Volf (Author) Other; Cidália M. S. Botelho (Author) FEUP

Journal

Title: Journal of Environmental Chemical Engineering

Vol. 4 No. 3

Pages: 3441-3450

ISSN: 2213-3437

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 8 Citations

Scopus - 14 Citations

Associated Projects

LSRE-LCM - Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais

LSRE/LCM LA - RL1_P3 - Environmental Technologies

Other information

Authenticus ID: P-00K-NYS

DOI: 10.1016/j.jece.2016.07.023

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10