Estimation Concentration of Lead, Cadmium and Cobalt in Al Guarshah Agricultural Project Soil

Soil samples were collected from Al Guarshah Agricultural Project and analyzed. Three different heavy metals Cadmium, Cobalt and Lead. Seven samples (total 24 subsamples) were collected from different places using auger at different depths (from 0.00 to 100cm). ccollected samples were dried at air and sieved into course (less than 2mm) and fine fractions. Sieving samples were achieved using by mechanical sieving apparatus which is consisted of different sizes of meshes (10.0- greater than 0.075 mm). After rolling the samples to break down the large masses of soil particles, well mixed samples of 2 g each were taken in 250 ml glass beakers and digested with 8 ml of aqua regia on using a sand bath for 2 hours. After the majority of dissolved samples were evaporated, 10 ml of 0.25 M of HNO3 was added to the samples and then filtered and diluted to 50 ml with distilled water. Extracted samples were measured by atomic absorption