Biosorption of Cr(III) by Microalgae and Macroalgae: Equilibrium of the Process
Izabela Michalak, Agnieszka Zielinska, Katarzyna Chojnacka and Jan Matula
DOI : 10.3844/ajabssp.2007.284.290
American Journal of Agricultural and Biological Sciences
Volume 2, 2007
Equilibrium experiments of chromium(III) biosorption by microalga (Spirulina sp.) and macroalga (Pithophora varia) were investigated in this paper. Influence of the following process parameters was studied: pH, biomass concentration and temperature. The equilibrium of the process was described with Langmuir equation. The model parameters were determined at various process conditions. The best operation conditions for the process were selected: pH 5, T 20oC, Cs 1g.l-1 for Pithophora varia and the same for Spirulina sp. Under these conditions, the maximum biosorption capacity 60.6 mg.g-1 and 34.6 mg.g-1, and affinity constant 0.182 l.mg-1 and 0.0553 l.mg-1 were reached for Pithophora varia and Spirulina sp., respectively. It was found that Pithophora varia was more efficient in biosorption of Cr(III) ions than Spirulina sp. Biosorptive properties of microalgal and macroalgal biomass can be employed either in the production of biological feed supplements for livestock or in wastewater treatment processes.
© 2007 Izabela Michalak, Agnieszka Zielinska, Katarzyna Chojnacka and Jan Matula. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.