عنوان مقاله [English]
This study has been carried out for determination of physicochemical parameters and concentration of Pb, Cd, Cr and Ni in JajroodRiver, Parchin area. The correlation between determined parameters with distance sampling was studied, and then they were compared to standard values in drinking water and to water which is used for breeding Onchorhynchus mykiss. Sample taking was carried out in random in February 2008 for eight stations in the distance of 4km.In the above stations samples were collected with standard methods, and pH, EC, DO, and temperature values were determined by portable instruments. The other parameters were determined in laboratory. In order to study the concentration of heavy metals, flame atomic absorption was employed. The results showed that the most effective parameters in water are temperature, turbidity,total total dissolved solids, dissolved Oxygen and conductivity. The concentration of phosphate and the other soluble materials are less significant. It was found that Calcium Chloride plays the most important role in increasing the electrical conductivity of water. moving down the river conductivity increases, whereas concentration of nitrate ion increases. By comparison of physicochemical parameters of the samples to standard values in Iran, it was found that turbidity of the samples showed significant differences with standard values (P<0.01) for drinking water and turbidity, electrical conductivity, concentration of Chloride ion and nitrate ion of the samples showed a significant difference with standard values for water which is used for breeding Onchorhynchus mykiss (P<0.01). Investigation showed that concentration of Pb, Cd, Cr, and Ni were very low therefore it is suitable for drinking water and breeding Onchorhynchus mykiss.