Bioaccumulation of some heavy metals in some organs of common carp (Cyprinus carpio) fish captured from Darbandikhan Lake Sirwan and Tanjaro river

Abstract

This study was done in three stations the Darbandikhan dam with GPS Coordination of this station 35°7’16’’N (Latitude) 45°43’18’’ E (Longitude), Sirwan River located in 35°7’17’’N; 45°50’54’’ E and Tanjaro River Side with GPS Coordination of Tanjaro River Site sample location details 35°14’22’’N; 45°51’58’’ E to study the heavy metals contamination in water and selected organs of carp lived in these three locations and for six months. The studied heavy metals include Hg, Cd, Pb, Cu, Co and Cr analyzed by ICP-OES (Spectro acros). The bioaccumulation levels of heavy metals by passing time in the liver of the fishes is significant P≤0.05 for all the studied heavy metals. Hg was higher significantly P≤0.05 in November 2021 and January 2022. Cd in October 2021. Pb in October 2021. Cu in September 2021. Co in September 2021. The Hg concentrations in common carp liver were higher significantly P≤0.05 in Sirwan station, the Co and Cu were higher significantly P≤0.05 in Darbandikhan dam fish, the Pb and Cd were higher in Sirwan and Tanjaro fish liver. In most months the bioaccumulation of Hg in fish gills is below the detectable level except for November 2021 which was higher and January 2022 which was lower significantly. Cd was significantly P≤0.05 higher in August 2021, the Pb in each of September and October 2021. The Cu was higher in November 2021, and the Co in October 2021. Pb was higher significantly P≤0.05 in each Sirwan and Tanjaro. Cu increased significantly P≤0.05 in Sirwan and Darbandikhan dams. Due to the annual mortality of fish in Darbandikhan, Sirwan and Tanjaro river the present research done in order to detect the main reasons of water pollution with some heavy metals and its relation to fish mortality and detect the levels of some heavy metals in some fish organs.