| چکیده انگلیسی مقاله |
A study was carried out to determine heavy metals in water sources of Hamadan city, Iran, in 1994. This pollutatnts are mainly discharged into environment by industrial waste water discharge , and fuel consumption. In this study to determine heavy metals , 90 water samples were analyzed using an atomic absorbtion , ( model 670 shimatzo ) . Concentration of eleven metals including ; Silver , Chromium , Zinc , Calcium, Magnesium, Cadmium, Lead, Nickel, Copper, Manganese and Iron were measured. The results showed that the mean concentration (SD) of Lead , Cadmium and Chromium were 0.514 (0.281) , 0.118 (0.169) , 0.107 (0.105) mg/l, respectively , which are higher than the standard levels. So , it is suggested that the authorities to force factories for wastewater treatment plant. |