Among the soil contaminants, heavy metals are of a high importance due to their poisonous nature, accumulative and physiologic effects on alive creatures even in non-considerable concentrations. These elements are deposited in soil as a result of their low mobility. Heavy metals are usually concentrated in surficial soil layers. Consequently, the elements are more into absorbing and transforming by roots of trees and plants. Considering the effects of elements on alive creatures, their source and history must be investigated. Every individual year adds a growth layer to the tree’s trunk. This way, after passing some years, a cross section of a trunk includes several centered growth rings indicating the tree’s age. Assuming that the trees are able to absorb both the soils and atmospheric contaminants, tree rings are investigated due to estimation of contaminant concentration during the past years. In the present thesis, several dendrochemical samples had been taken out of Pines by means of biomonitoring the environment of Isfahan Steel Company. The samples are classified in five years rings clusters and analyzed. Results of analysis is indicated that the elements are more into absorbing by the leaves and trunks of trees rather than their roots. However, it is concluded that some elements as V, Co and Cr which are used for processing of metals and commonly visible in waste dumps, have high concentrations in the trees of this study area.
