Optimization Of a sequential extraction scheme for the characterization of heavy metal mobility in iron oxide rich sediments

摘要

Several parameters governing the extraction of metals from iron oxide rich sediments, using sequen- tial extraction schemes were optimized. The mode of shaking, soil/extractant ratio and concentrations of MgCl_2 and NH_2 Oh.HCl, for samples collected in the Odiel Marshes Natural Park (SW Spain), were considered. The concentration of NH_2 OH.HCl deserved particular attention due to the nature of the studied sediments.