Concentration of Heavy and toxic metals in downstream of Sungun Mine dumping site and the role of lime bed of the river in the attenuation of the pollutants

Pollution of river can be decrease by means of self-purification character of river. Activity of the Sungun copper mine at north west of Iran, causing pollution of downstream. As well as, study of river’s water quality and self- purification potential Changing Procedure is very important. For this purpose, the samples were selected from 9 stations in Sungun mining area in Sungunchai, Pakhirchai, Arghanehchai, Miankafe and Ilgineh rivers, and chemical parameters such as pH, EC, TDS, TSS and heavy metals were studied. HPI (Heavy Metal pollution index) and MI (metal index) are used for investigation of heavy metal pollution. The evidence shown that contamination was decreased at the river route and correlation this phenomenon with pH value was investigated. The correlation between heavy metal in water and sediment was compared, and it was found that, concentration of heavy metal in water and sediment have correlation and it influenced from changing of pH value. Interaction between water and limestone in the bed river caused to increasing of self-purification of river.