Study of physico-chemical characteristics of Iron and Manganese in Smir Lake Dam (Morocco)

The study of iron and manganese,key factors responsible for the deterioration of the water quality in an aquatic environment has been undertaken to assess the potential mobility of these elements on the surface and at the bottom of lake dam smir. levels of iron and manganese recorded during campaigns during 2007 -2008 analyzes are generally variables,on the one hand according to the season (time) and the other in space (vertical variation). the mean levels in the dam area are relatively low and do not exceed the limit values of 0.2 and 0.05 mg /l for iron and manganese (quality standards for surface waters moroccan). moreover,the highest values were found at the bottom sometimes exceeding standards and at the same time raising the difficulties of treatment and drinking water. the analyses of iron and manganese in smir dam in addition to the temporal evolution taking into account the factors that determine their presence shows a double origin is linked to their release from the sediment deoxygenated or due to the transfer by runoff of these two metals in the watershed of the smir river to the dam.