Abstract
The efficiency of Cu2+ ion extraction of magnetically labeled biosorbent based on yeast Sacharomyces cerevisiae obtained by magnetohydrodynamic stirring in combined magnetic and electric fields has been determined. The effect of different concentration of magnetic nanoparticles and yeast cells on the magnetic susceptibility was determined. Optimal magnetite content is 1 %, as such biosorbent has a maximum magnetic susceptibility and the best stability. The higher sorption capacity is observed for magnetically labeled biosorbent obtained through the magnetohydrodynamic stirring in the combined magnetic and electric field with concentration of magnetite 1 %. The process of active and passive biosorption shows that part of the magnetite nanoparticles has been attached to the surface of biosorbent. This indicates that both passive and active sorption takes place in the process of interaction of yeast cells and magnetite nanoparticles.
Highlights
Combined treating of waste waters using mechanical, physical and biological methods is the most widespread among the existing technologies of water purification from ferrous and non-ferrous metal impurities, mechanical engineering and electroplating industry [1].Nowadays the existing biological methods of the waste water purification based on capability of microorganisms to accumulate and absorb ions of heavy metals are spreading very fast [2]
MLBSs obtained through the magnetohydrodynamic stirring in the combined magnetic and electric field have fewer predispositions to form clusters than the MLBSs obtained through the mechanical stirring Fig. 2
The lower sorption capacity is observed for MLBSs obtained through the mechanical stirring with concentration of magnetite 10 %
Summary
Nowadays the existing biological methods of the waste water purification based on capability of microorganisms to accumulate and absorb ions of heavy metals are spreading very fast [2]. Labeled biosorption is the most promising method of purification of liquid wastes from the heavy metals among the others [3]. First of all, this method is low-priced because derivative products of biotechnological manufacture can be used as biosorbent (BS). Magnetically labeled BS (MLBSs) can be separated from the aqueous solution using the high-gradient magnetic separation (HGMS) in a high-speed mode [4]. Culture of bakery yeasts Saccharomyces cerevisiae has been provided with magnetic properties using magnetic nanoparticles and used as MLBSs in this paper
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