Risk assessment of pollution with heavy metals in water and fish from River Nile, Egypt

Abstract The aim of this study is to investigate the level contamination with metals (Fe, Mn, Zn, Cu, and Pb) in Nile River at great Cairo region. Samples water fish were collected seasonally from different sites along investigated area. Physical chemical parameters studied samples such as temperature, transparency, electrical conductivity, pH, BOD, COD measured. In aquatic ecosystems, heavy metal concentrations are monitored by detecting some indices like pollution (WPI) bioaccumulation factor (BAF). results clarified that Fe, Pb, Mn exceed allowed limits set WHO, 2011 all while Cu Zn limits. While muscle Fe within permissible FAO, 1992, but Pb Some Ni essential for animals plants many other Cd, Cr Co classed nonessential metals. All values HI below 1 except case habitual eaters give alarm consumer.