evaluation of ni pollution in leaf of plantain (platanus orientalis) and soil in rasht city area

heavy metals are one of the most important and the best known pollutants that its entry into the environment causes to appear damages and different diseases. this study aimed to determine the amount of nickel concentration in soil and leaves of platanus orientalis, estimate and mapping it in rasht city area by using geostatistic method. to achieve these goals 126 samples of surface soil (0-30 cm) and 76 samples of leaves (platanus orientalis) were collected from rasht city streets. total concentrations of nickel in soils and leaves were determined by atomic absorption spectroscopy. average concentrations obtained for the nickel in terms of mg/kg would thus be: 35.59 for soil and 2.7 in leaves. soil’s nickel in the region were lower than threshold alerts and toxicity and about %9.2 of leaf nickel’s data were above tolerable limit. spherical model and linear model fitted better in experimental variogram in gs+ program by using try and error method. kriging and idw estimator was used for interpolation. kriging estimation was mapped by using arc gis 9.2 software.