Study of Potentially Toxic Metal Adsorption in a Polluted Acid and Alkaline Soil: Influence of Soil Properties and Levels of Metal Concentration

In the present study, adsorption of zinc (Zn), lead (Pb), copper (Cu), and cadmium (Cd) was studied in two already polluted urban soil samples with different pH values, an acidic alkaline one. The Langmuir Freundlich isotherm equations were used to thoroughly study metallic elements on solid surface soils. equation described each metal satisfactorily, a slight predominance over Freundlich, both soils, as R2 value approached almost unity. Even though Zn Cu adsorbed phase, their minimal compared more harmful metals such Pb Cd. Using values coefficients obtained from mathematical models, we concluded that retention much greater than simultaneous presence during addition single-element solutions metal-contaminated soils caused competitive increasing toxic soil. Factors affecting sorption (such CaCO3 content) provide theoretical support for understanding laws causes survey.