SEGUENTIAL EXTRACTION OF LEAD , NICKEL AND CADMIUM ELEMENTS IN CONTAMINTED SOILS

The study included samples were taken from soil by two Depth (30, 60 cm), with Silty Loam texture, from five locations close to the Euphrates plant for chemical materials and Al Sadda cement in Babylon Province to study the soil contamination with heavy elements (lead, nickel and cadmium) and their presence in the soil through successive extraction. The results showed that the soil components differ in the ability to reserve a quantity of heavy elements and this depends on the proportion and type of that component in the soil. The sequence of soil components was in the retention of heavy metals based on concentration (carbonate minerals iron oxides and hydroxides clay organic substances) the sequence of heavy elements in each component of soil (lead