It is now known that to determine the effect of heavy metals on the environment is not sufficient merely to determine the total content of the element in the environment. The first examples of sequential extraction for bottom sediments and soil come from the seventies. Tessier et al. used a sequential chemical extraction method, identifying the five forms.
Salomons and Forstner developed a method that allows to distinguish 4 factions:
exchangeable cations (metals here are loosely associated with the outer structure of the particle), eluting with ammonium acetate,
I think it can be applied for mobilization, as the mobilization of metal in soil/sediment decrease from first fraction (exchangeable) to last one (residual). So, most of the time metals with higher concentrations in first and second fractions show high mobility in comparison to metals with higher concentrations in the last two fractions.
yes it can be applied for mobilization of metal in industrial solid wastes/soil/sediment decrease from first fraction (exchangeable) to last one (residual). So, most of the time metals with higher concentrations in first and second fractions show high mobility in comparison to metals with higher concentrations in the last two fractions.
Tessier et al. (1979) method of sequential leaching is designed to evaluate partitioning of metals into different chemical compartments of the wastes/soil/sediment. Therefore, it can be used for mobilization of metals by specific chemical components present in the wastes/soil/sediment. You can correlate specific fraction of metals with the amount bio-accumulated using appropriate statistical design. Many agricultural scientists report only exchangeable metals in the soils and metals accumulated in crop plants assuming that crop plants accumulate only easily available exchangeable fraction of metals in soil. This may not be true for metals accumulated by bottom organisms in aquatic ecosystem.