Heavy Metals Assessment in Water,Sediments and Some Organs of Oreochromis niloticus under the Impact of Sewage Water

Abstract

The present work, aimed to estimation the physicochemical characters of water and metals Aluminum (Al), Chrome (Cr), Manganese (Mn), Iron (Fe), Cobalt (Co), Nickel (Ni), Copper (Cu), Zinc (Zn), Selenium (Se), Cadmium (Cd) and Lead (Pb) accumulation in sediments and different fish organs (gills, intestine, kidney, liver, muscles, ovary, testis and skin) of Oreochromis niloticus, which collected from sewage water in El-kharja, New Valley, Egypt using inductively coupled plasma mass spectrometry (ICP-MS).The present study showed that Fe was the highest accumulation level in water, sediments and fish tissue. Metals concentration in water following trend: Fe>Al>Mn>Ni>Zn>Pb>Cr>Se>Cu>Co>Cd. However, metals accumulations in sediments were as follows: Fe>Al>Ni>Mn>Cr>Cu>Zn>Pb>Cd>Se>Co. Also, liver was highest accumulated metals organ, while muscles recorded the lowest concentration of metals. Metals accumulation trend was: Liver>Kidney>Ovary>Intestine>Gills>Testes>Skin>Muscle. In conclusion, the present study revealed that the accumulation of Al, Fe, Mn, Ni and Pb in water were above the permissible limits. However, Al and Fe in muscles were above the permissible limits. This study showed that results of water toxicity tests and metals accumulation in fish may be used together in the water quality assessment.

Pollution induced change of liver of Oreochromis niloticus: metals accumulation and histopathological response

“…However Co than Se was the lowest one. Similar to our results, Omar, Zaghloul [37] and Ibrahim, Wassif [22] who found highly precipitation of heavy metals concentration from water column sediment samples.…”

“…Also, Kaoud and El-Dahshan [40] reported that Cd and Cu concentrations were the highest in liver. The high Zinc accumulation in liver was in agreeing with Ibrahim [39], El-Naggar and Tayel [41], Ibrahim and Omar [42]; Ibrahim, Wassif [22]. Ibrahim [39] also, found that Fe and Ni accumulation in liver as a target organ of Oreochromis niloticus.…”

“…The present investigation showed that Al, Cd, Fe and Pb concentrations in liver of O. niloticus were more than the permissible limits of EOS [30], and WHO [31]. Similarly, Authman, Abbas [38], Ibrahim [39] and Ibrahim, Wassif [22] found that these elements are more than permissible limits in liver of O. niloticus. Also, Kaoud and El-Dahshan [40] reported that Cd and Cu concentrations were the highest in liver.…”

“…Liver play as multiple oxidative reactions site that formed from metal accumulation and maximal free radical generation [22,39,42]. Metallic pollution caused the formation of free radicals in different tissues which caused histopathological alteration in different tissues [43].…”

“…The present study was carried out in El-kharja city, New Valley Governorate, Egypt at El-shikh pond [22]. The quality of this ecosystem has been degrading due to industry, agriculture and human activities.…”