Some Organophosphorous Pesticide (OPPS) and Heavy Metals along the Southern Caspian Sea Coast, Mazandaran State, Iran

Concentrations of six heavy metals (Pb, Cd, As, Zn,Co, and Cr)in surface sediment from Mazandaran province along the southern Caspian Sea Coast, Iran were determined to evaluate their levels and spatial distribution. The ranges of the measured concentrations in the sediments are as follows: 20.08-71.37ng/g for Pb, 1.67-3.81 ng/g for As, 32.01-51.12 ng/g for Cd, 16.91-32.32 ng/g for Zn, 7.63-11.92 ng/gforCr,24.39-52.41ng/gdry weights for Co. The concentrations of all metals in sediment samples are lower than the proposed TECs indicated that there are no harmful effects from these metals. The content of Pb, Cd, As, Zn, Co, Cr in sediment samples were Analyzed by ANOVA followed by students T-TEST (p<0.05). The Organophosphorous Pesticides analyzed in this investigation were Diasinon, Chlorpyr fos, Ethion and Edifenphos with mean concentration in the ground water Of the studied area were 0.018, 0.017, 0.014and 0.013 µg/l, respectively. Diazinon concentration in springs was higher than that of wells, but Ethion was found in higher concentrations in wells