Distribution of cobalt and nickel in plankton and it's aquatic surround habitats in euphrates and al-Garaf rivers at al-Nassiria city, southern of Iraq

الملخص EN

The study was carried out to investigate the distribution of concentrations two heavy metals Cobalt (Co) and Nickel (Ni) [as heavy metals] in plankton (phytoplankton and zooplankton) and in its surrounded habitats(water, sediment and aquatic plants) in two rivers (Euphrates and Al-Garaf) at Al-Nassiria city, southern of Iraq, for one year January-December, 2004.

Results showed considerable seasonal variations in the concentrations of these two metals.

Ni concentration in plankton and aquatic plants were found to be greater than that ! of Coin both rivers, while the concentration factor (plankton / water) and (aquatic plants / water) for Ni was greater than for Coin both rivers.