Environmental geochemistry of toxic heavy metals in surface sediments of Qaen, Iran

Heavy metals are naturally present in our environment are dangerous for the due to their toxic and stable behavior in nature. In this study, to evaluate the risk of heavy metals pollution, a dataset of stream sediment elemental concentration of the ۱:۱۰۰,۰۰۰ scale Qaen quadrangle map was used. The mean concentrations of Cu, Pb, Zn, Cr, Co, and Ni in the surface sediments of the study area were ۲۱ mg/kg, ۲۲ mg/kg, ۵۷ mg/kg, ۶۲ mg/kg, ۱۲ mg/kg and ۴۰ mg/kg, respectively.The methods for calculation of pollution indices such as Enrichment Factor (EF), Contamination Degree (CD) and Contamination factor (CF) are considered to know the level of heavy metal pollution in the study area. The results of pollution indices suggest that almost all the sites are polluted by heavy metals. The data could be very useful to metal pollutants and their sources in the surface sediments.

کلیدواژه ها:

Heavy metals ، Enrichment Factor (EF) ، Contamination Degree (CD) ، Contamination factor (CF) ، Qaen