Effect of interactions between Cu2plus, Co2plus and Pb2plus, Cr3plus, Zn2plus, Ni2plus or Cd2plus on their sorption and mobility in grey-brown podzolic soils

The aim of the study was to determine the effect of competition between heavy metal cations on sorption extent of Cu2+ and Co2+ as well as to estimate of their mobility in soils through desorption with 0.05 M CaCl2 solution. The one-component CuCl2 or CoCl2, two-component CuCl2 and CoCl2 or three-component CuCl2, CoCl2 and Pb(NO3)2, CrCl3, NiCl2, ZnCl2 or CdCl2 solutions were introduced into the columns with two grey-brown podzolic soils. Cations of Cu2+ affected non-specific and specific Co2+ sorption extent while Co2+ had a smaller effect on Cu2+ sorption. In the three-component systems Cu2+ and Co2+ sorption was mostly inhibited by Pb2+ and Cr3+ but only to a small extent by cations of other heavy metals under investigation.