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Studies of competitive Cu2plus, Co2plus and Cr3plus sorption in grey-brown podzolic soils

100%

Paszko T.

Polish Journal of Environmental Studies

2003

tom 12

nr 4

Studies of competitive sorption were carried out using the three-component solution CuCl2, CoCl2 and CrCl3 in two grey-brown podzolic soils saturated with Ca2+ cations. In most cases in batch experiments the Freundlich equation was the best to describe the sorption process. The linear sorption equation was success-fully applied to describe Cr3+ and Cu2+ sorption in column experiments. A significant effect of Cu2+ and Cr3+ on Co2+ sorption was found in both column and batch experiments. Sorption of ions of the studied heavy metals was not equivalent to Ca2+ desorption from soil.

Dynamics of competitive sorption of heavy metal cations in mineral soils

100%

Gaszczyk R. , Muszynski P.

tom 35

Model research on competitive sorption of heavy metal cations (Cu2+ , Zn2+ , Ni2+ ,Co2+ , Cd2+ and Cr3+ ) with Ph2+cations was carried out in the followingmineral soils: grey-brown podzolic derived from loess (Orthic Luvisols)using a dynamic method.Investigation on the course and the range of the sorption from the two- component solutions allowed to determine mobility of individual heavy metal cations in relation to lead (II) cations.At the same time, it allowed to evaluate their phyto-availability. Elements, which most easily entered sorptive complexes of both of the investigated soils were copper (II) and chrominium (III) cations. The rest of the cations showed different energy levels of entrance with simultaneous sorption with lead (II) cations. During competitive sorption of heavy metal cations, i.e. at saturation the columns with two component solution, the presence of the second, opposite process namely desorption of the following cations from the soil:Co2+ , Zn2+ , Ni2+ , and Cd2+ was observed. Desorption levels were characteristic for particular cations and depended on the type of soil.