Bioaccumulation of Hg, Cd and Pb by Fucus vesiculosus in single and multi-metal contamination scenarios and its effect on growth rate
authors Henriques, B; Lopes, CB; Figueira, P; Rocha, LS; Duarte, AC; Vale, C; Pardal, MA; Pereira, E
nationality International
journal CHEMOSPHERE
author keywords Trace metal contaminants; Marine macroalgae; Bioaccumulation; Kinetic modelling; Growth rate
keywords HEAVY-METALS; MARINE MACROALGAE; AQUEOUS-SOLUTIONS; SALINE WATERS; ULVA-PERTUSA; BROWN-ALGAE; BIOSORPTION; MERCURY; COPPER; ACCUMULATION
abstract Results of 7-days exposure to metals, using environmentally realistic conditions, evidenced the high potential of living Fucus vesiculosus to remove Pb, Hg and Cd from contaminated salt waters. For different contamination scenarios (single- and multi-contamination), ca 450 mg L-1 (dry weight), enable to reduce the concentrations of Pb in 65%, of Hg in 95% and of Cd between 25 and 76%. Overall, bioconcentration factors ranged from 600 to 2300. Elovich kinetic model described very well the bioaccumulation of Pb and Cd over time, while pseudo-second-order model adjusted better to experimental data regarding Hg. F vesiculosus showed different affinity toward studied metals, following the sequence order: Hg >Pb>Cd. Analysis of metal content in the macroalgae after bioaccumulation, proved that all metal removed from solution was bound to the biomass. Depuration experiments reveled no significant loss of metal back to solution. Exposure to contaminants only adversely affected the organism's growth for the highest concentrations of Cd and Pb. Findings are an important contribute for the development of remediation biotechnologies for confined saline waters contaminated with trace metal contaminants, more efficient and with lower costs than the traditional treatment methods. (C) 2016 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0045-6535
isbn 1879-1298
year published 2017
volume 171
beginning page 208
ending page 222
digital object identifier (doi) 10.1016/j.chemosphere.2016.12.086
web of science category Environmental Sciences
subject category Environmental Sciences & Ecology
unique article identifier WOS:000393931100025
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