HEAVY ELEMENTS ACCUMULATION IN TOW SUBMERGEDPLANTS (NAJAS MARINA LAND CERATOPHYLLUM DEMARSUMSOUTHERNOF IRAQ)REHAB SALIM KHAZAAL AL-ATBEEAbstract The content of heavy elements Copper (Cu), Zinc (Zn) and Iron (Fe) were studied in towsubmerged plants species (Najas marina L and Ceratophyllum demarsum) collected seasonally for periods summer 2019 to spring 2020at two site selected along Al-Chibayish Marsh southern of Iraq to determine the ability of these species to accumulate elements from surrounding water and sediment. The result showed that the average concentration of elements in water for the Particulate phase higher than in the dissolved phase. Also, mean concentrations of particulate phase higher than their mean concentration in total sediments samples except for Fe concentration which was in sediments samples was higher than in particulate part of water. The uptake of totalelements by two studied aquatic plants showed that the highest uptake of elements by the C.demersum spices excepted Fe which higher concentration in N.marina. Also, Bioconcentration factor (BCF) for different elements were calculated and according to these factor data, the orderof heavy elements accumulation in two species were Fe > Zn> Cu. |