Cr (VI) biosorption at different Na (I) concentrations after Zn(II) uptake during Arthrobacter species growth
The biosorption of Cr(VI) Arthrobacter species (Arthrobacter globiformis 151B and Arthrobacter oxides 61B) after growth in the presence of Zn (II) ions at different Na (I) concentrations was studied application using dialysis and atomic absorption analysis. It was shown that after absorption of Zn(II) during growth of types of Arthrobacter the biosorption of Cr (VI) with types Arthrobacter (Arthrobacter globiformis 151B, Arthrobacter oxidas 61B) increases at various concentration of Na (I) comparative without Zn(II), at identical concentration of Na (I). It is seen, that zinc(II) ions promote for Cr(VI) part of the active centers of Arthrobacter species and Na(I) ions already has relatively little effect on them. However, this change is more pronounced for Cr (VI) _Arthrobacter globiformis 151B + Zn (II) than for Cr (VI) _Arthrobacter oxides of 61B + Zn (II).