Health risk assessment of heavy metal intake due to fish. Bioaccumulation of heavy metals zn, pb, cd, and cu was determined in the liver, gills, and flesh from benthic and pelagic fish species collected from lake geriyo covering two seasons. The levels of heavy metals varied significantly among fish species and organs. Bioaccumulation of heavy metals in some tissues of fish in. The concentrations of heavy metals cu, zn, pb, cd, fe and mn were measured in the liver.
The results showed that the cr, cu, cd and pb content in the edible parts of the two fish species were much lower. The results confirmed exposure of fishes to heavy metals not only. In the present study, the bioaccumulation of heavy metals cr, cu, cd, pb content were determined in freshwater edible fishes cyprinus carpio linnaeus and pelteobagrus fluvidraco, which were caught from the meiliang bay, taihu lake, a large, shallow and eutrophic lake of china. However, many factors such as the environmental conditions, the contaminant levels, the length of the food chain, and the physiochemical properties of the contaminants are involved in the trophic. The objective of the present study is to determine the bioaccumulation of heavy metals in various organs of the fresh water fish exposed to heavy metal contaminated water system. So heavy metals exposure can effectively decrease estrogenic and androgenic secretion in fish. Fish living in polluted waters tend to accumulate heavy metals in their tissues. The current study aimed to determine the heavy metal concentration and toxicity in some freshwater fish species collected from the tigris river. The order of heavy metal accumulation in water was cu cr pb cd hg. Determination of heavy metals in freshwater fishes of the. Bioaccumulation and potential for effects can be assessed by use of regression models. This paper assesses the potential human health risks posed by five heavy metals zn, pb, cu, cd, and cr found in seven most consumable fish. For example, eels accumulated more metals in muscle and grey mullet in the liver.
Bioaccumulation of some heavy metals in tilapia fish. Cu content was the highest and that of cd was the lowest in water. The concentrations of heavy metals cu, zn, pb, cd, fe and mn were measured in the liver, gills and muscles of fourteen benthic and pelagic fish species collected from three main landing areas shalateen, hurghada and suez in the egyptian red sea. The experimental fish was exposed to cr, ni, cd and pb at sublethal concentrations for periods of 32 days. Pdf bioaccumulation of heavy metals in fish hydrocynus. The increasing amounts of heavy metals entering aquatic environments can result in. Assessment of heavy metal residues in water, fish tissue and human. Eating certain kinds of fish has become a major health concern due to the amount of heavy metals and other contaminants in water pollution. Bioaccumulation of heavy metals in some tissues of fish in the. Flesh possessed the lowest concentration of all the metals. Generally, accumulation depends on metal concentration, time of exposure, way of metal uptake, environmental.
Bioaccumulation of heavy metals in organs of fresh water. The elements cd, pb, ni and cr were assayed using shimadzu aa 6200 atomic absorption spectrophotometery and. The three fish species showed differences in metal content. Liver was the target organ for zn, cu, and pb accumulations. Bioaccumulation of mercury, cadmium, zinc, chromium. Pdf the metal uptake and accumulation in fish living in. The levels of the heavy metals varied significantly among fish species and organs. The effects of heavy metals exposure on reproductive systems of. Bioaccumulation of metal substances by aquatic organisms. Bioaccumulation and potential sources of heavy metal. Heavy metals lead, cadmium and nickel concentration in different organs of. Lead and cadmium levels in ubeji river significantly. Bioaccumulation of heavy metals in fish hydrocynus forskahlii, hyperopisus bebe occidentalis and clarias gariepinus organs in downstream ogun coastal water, nigeria article pdf available.