摘要
Mercury concentration in water, sediments and two aquatic plants were measured in the Tigris River for the period in 2013 Hg concentrations in water between 0.18-0.74 μg/g, however, in sediments ranged between 0.66-0.73 lag/g. The concentrations of accumulated mercury in aquatic plants ranged in Ceratophyllum demersum and Phragmitus australis were 0.035-0.022, 0.028-0.023 μg/g, respectively. The concentration bioconcentration factor B.C.F range between 0.331-0.209 μg/g and B.S.F 0.043-0.011 μg/g. These results indicate the ability of the aquatic plants of Tigris River to accumulate elements in their tissues more than water consequently, mercury concentrations in the food chain path way could cause health problems on public health by transfer through aquatic organisms to human. The studied plants could be considered as bioindicator for elements flow to the river from natural and anthropogenic sources. The study showed there is an increase in the concentration of this element in the Tigris River and due to the low rate of discharge of river water, which leads to high concentrations of ions dissolved and effect divorced industrial waste and sewage and irrigation water, especially in the area of Zafaraniyah a result of the large number of events industrialized as well as the impact of the Diyala River on the River Tigris.
