Calcium interference with continuous biosorption of zinc by Sargassum sp (Phaeophyceae) in tubular laboratory reactors
authors de Franca, FP; Tavares, APM; da Costa, ACA
nationality International
journal BIORESOURCE TECHNOLOGY
author keywords biosorption; calcium; environment; Sargassum sp.; seaweed; zinc
keywords HEAVY-METALS; BIOSORBENT; BIOMASS; REMOVAL; ALGAE; CD; CU; ZN
abstract The zinc biosorptive capacity of the brown seaweed Sargassum sp. (Phaeophyceae) was studied in the presence or absence of competing calcium ions, using a continuous system with tubular fixed-bed reactors. In order to detect the effect of calcium on zinc biosorption, a 130 mg/l zinc solution was used, and calcium was added at 50-340 mg/l. The potential zinc biosorptive capacity of the biomass was markedly influenced by the presence of ionic calcium. Zinc sorption decreased with increasing calcium concentrations, as expressed by zinc uptake rates. Calcium was effectively recovered only during the initial stages of the process, as expressed by the decrease in its uptake rates. Calcium uptake rates were also much higher than zinc uptake rates, indicating that calcium was preferentially recovered when compared to zinc. (C) 2002 Elsevier Science Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0960-8524
year published 2002
volume 83
issue 2
beginning page 159
ending page 163
digital object identifier (doi) 10.1016/S0960-8524(01)00198-5
web of science category Agricultural Engineering; Biotechnology & Applied Microbiology; Energy & Fuels
subject category Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels
unique article identifier WOS:000175574600013
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journal impact factor 5.807
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