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BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access November 29, 2012

The effect of increase in concentration of Na(I) ions on biosorption of Cr(III) ions by Enteromorpha prolifera and Spirulina sp

Izabela Michalak EMAIL logo , Agnieszka Saeid and Katarzyna Chojnacka
From the journal Open Chemistry

Abstract

In this study, the effect of the increase in the initial concentration of Na(I) ions in the solution during biosorption of Cr(III) ions by two edible algae: marine macroalga — Enteromorpha prolifera and microalga — Spirulina sp. was investigated. During biosorption, essential elements are exchanged with alkali and alkaline earth metal ions (e.g. Na(I) ions), which are naturally bound with the biomass. The goal of this study was to investigate the effect of the increase in concentration of Na(I) ions on biosorption performance. The equilibrium of the process is described by Langmuir equation. It was found that with the increase in the initial concentration of NaCl (from 132 to 7331 mg L−1), there was a lower biosorption capacity of Enteromorpha prolifera (from 85.8 to 51.0 mg g−1) and Spirulina sp. (74.2 to 20.7 mg g−1) towards Cr(III) ions. It was also possible to determine the number of times the solution used in the biosorption process can be recycled and yet mantain high biosorption capacity. The determined numbers were: 16 for Enteromorpha prolifera and 19 for Spirulina sp.

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Published Online: 2012-11-29
Published in Print: 2013-2-1

© 2013 Versita Warsaw

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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