Abstract
Abstract The biosorption of Cu(II), Zn(II) and Ni(II) by microscopic green algae Chlorella kessleri was investigated using batch experiments. Biosorption studies with single and multi ion solutions were carried out to study the effect of several ions on the biosorption of selected metal. The influence of zinc and nickel on copper biosorption, copper and nickel on zinc biosorption and zinc and copper on nickel biosorption were investigated. The Langmuir and Freundlich model were used to describe the adsorption equilibrium of studied metals on Chlorella kessleri biomass. Based on the experimental results it was found that the presence of copper increased the biosorption capacity of zinc from 48.6 mg/g to 96.8 mg/g and nickel from 29.3 mg/g to 62.7 mg/g, respectively. However, the presence of nickel decreased the biosorption capacity of zinc from 48.6 mg/g to 31.7 mg/g.
Highlights
Environmental pollution is a very serious problem in the present time
The presence of several metals in solution may have a synergistic or antagonistic effect on their biosorption, which depends on many factors, such as the quantity of metal ions competing for the same binding sites, the concentration of metal ions, the nature and concentration of biosorbent (WANG and YONG, 2005; HORVÁTHOVÁ, KADUKOVÁ, 2008; MAREŠOVÁ et al, 2011)
The positive effect of Zn on Cu biosorption was observed at higher equilibrium concentrations
Summary
Environmental pollution is a very serious problem in the present time. The main sources of heavy metals contamination in wastewater derived from electroplating, metal finishing and metallurgical industry. Zinc and nickel are present in almost all types of wastewaters. These metals are toxic even at low concentrations (KADUKOVÁ and VIRČÍKOVÁ, 2003). The presence of several metals in solution may have a synergistic or antagonistic effect on their biosorption, which depends on many factors, such as the quantity of metal ions competing for the same binding sites, the concentration of metal ions, the nature and concentration of biosorbent (WANG and YONG, 2005; HORVÁTHOVÁ, KADUKOVÁ, 2008; MAREŠOVÁ et al, 2011). Due to the relatively small amount of information on the interaction among non-ferrous metal
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