Fractionation of elements in soils, sludges and sediments: batch and dynamic methods

Methods and approaches employed in the fractionation of elements according to their physicochemical mobility and bioavailability in soils, sludges and sediments are generalised. Comparative analysis of sequential extraction schemes for heavy metals, arsenic, selenium and phosphorus is performed. Special consideration is given to the flow-through fractionation and kinetic aspects of selective leaching.