The bioremediation of some heavy mineral elements by using of some blue green algae isolated from Euphrates at Nassiriah city

Abstract

In the present study two species of blue green algae ( Oscillatoria amoena and Nostoc linckia ) were treated by two kind of heavy mineral elements are cobalt (Co.) and cadmium ( Cd.) in different concentration ( 0.10 , 0.25 , 0.5 , 1.0 and 2.0 ) mg / l for two weeks to know their capability in the accumulation . The results of the study were revealed that , the algal Oscillatoria amoena accumulated more of cobalt element at the treatment ( 2) mg / l was ( 1.726 ) µg /gm of dry weight , whereas , the concentration was ( 1.535 ) ) µg /gm of dry weight in the algal Nostoc linckia at the same treatment. On the other case , the algal Nostoc linckia was accumulated more of cadmium element ( 1.28 ) µg / gm of dry weight on the compares with the algal Oscillatoria amoena which accumulated ( 0.59) µg /gm of dry weight of the same element at the same treatment ( 2) mg / l . A difference was observed between the treatments of the added element concentrations , the concentration of the heavy element was a gradually increases on the algal with the increase of the concentration on the treatment , and from the results of the statistical analysis some significant differences were found on the concentrations of cobalt and cadmium elements on the two algae species between the used treatments