Abstarct: Increased agricultural and industrial activies cause entrance of heavy mextals such as chromium, cadmium and nutrients into the water and soil. In this study, two types of Russian olive biochar (Be) and rice husk biochar (Br) were used as an adsorbent, to remove phosphate, nitrate, cadmium and chromate from aqueous solution and soil. For this purpose, kinetics, and adsorption isotherms the effect of contact time, initial concentration and pH in adsorption of phosphate and chromate cadmium and nitrate on two types of biochars in aqueous solution were studied. The results showed that maximum amaunt of adsorption of chromium by rice husk biochar and russian olive leaves were in pH=7.06 and 8.28 respectively with increasing and decreasing in pH, the adsorption of chromium decrease .However the maximum adsorption of phosphate by rice husk biochar and russian olive leaves were, in pH=6.38 and 8.28 respectively. In comparison between thee two types of biochars in adsorption of chromium, rice husk biochar revealed higher adsorption rather than russian olive leaves biochar because the maximum adsorption of phosphate by rice husk biochar was 95.41% and maximum adsorption of chromium by it was 24.38%. In kinetic equations pseudo-second order model had better fit on adsorption kinetics with R2>0.98 relative the other two adsorption kinetics in adsorption isotherms, Freundlich model had better fit than the Langmuir model. In case of nitrate adsorption, the maximum amount of nitrate adsorption by rice husk biochar and russian olive leaves biochar were in pH=4.75 and 7.78, respectively. The maximum amount adsorption by rice husk and Russian olive leaves biochars were 22.6% and 22.52%, respectively. In case of kinetics of adsorption of nitrate, second-order kinetics had better fit with the experiment data, though first-order kinetics having R2 =0.92 had good fit with experiment the data. The results revealed that adsorption isotherms of nitrate by two types of biochar had good fit with adsorption isotherm of both Freundlich and Langmuir models. Experiments and kinetic evaluation in case of cadmium revealed that maximum adsorption by rice husk biochar, was done 91.78% and in pH was 7.15 and maximum adsorption by rice husk biochar was done 99.9% in pH= 7.9. second-order model R2>0.96 had better fit relative to the zero-order model and one-order model however in case of adsorption isotherm Langmuir model with R2=0.88 was propotional to experimental data with by increasing and decreasing in pH, adsorption rate of chromium was increased and decreased respectively. the results of data experhment revealed that, adding rice husk biochar resulted in increase 60% in dry weight and adding raw russian olive leaves resulted in 50% decrease in dry weight compared to the control sample. Application of rice husk biochar, caused a decrease in drained water volume by 28% and application of russian olive leaves biochar caused 41% decrease in drained water in relative to the control, adding russian olive leaves biochar pH increased by 8% and drained water, caused a increase in EC by triple compared to the control sample. In Chromate drained water adding raw Russian olive leaves, rice husk biochar and russian olive leaves biochar increase in adsorption of chromate were 95%, 35% and 51% respectively in compared to the control.