Assessment of heavy metal pollution in water and its effect on Nile tilapia (Oreochromis niloticus) in Mediterranean Lakes: a case study at Mariout Lake (original) (raw)
Related papers
The Journal of Basic and Applied Zoology
Background: Burullus Lake has received a great attention because of its environmental and economic importance for being a significant source of fish production in Egypt. It is subjected to many of environmental changes due to the huge amount of discharges originated from different sources as well as many human activities. The Nile tilapia (Oreochromis niloticus) is an abundant sedentary fish present in the most Egyptian lakes, Nile River, and ponds. The study was designed to evaluate some metal pollution in Burullus Lake. Results: The values of heavy metals (Mn, Zn, Fe, Ni, Cu, and Pb) were measured in lake water and muscles of O. niloticus fish during winter and summer 2014. Water samples were collected from six sampling sites, while fish samples were collected from the three sectors (eastern, middle, and western) of the lake. The mean values of heavy metals (Mn, Zn, Fe, Ni, Cu, and Pb) in surface water of Burullus Lake during winter and summer for the year 2014 were 1.09, 10.50, 29.38, 6.87, 2.05, and 5.98 μg/L, respectively, whereas the annual means of heavy metals (Mn, Zn, Fe, Ni, Cu, and Pb) in the muscles of O. niloticus fish were 0.68, 4.70, 10.62, 0.52, 0.39, and 0.46 μg/g wet wt., respectively. Conclusions: In lake water, Mn was the lowest concentration of the six sampling sites, while Fe was the highest concentration, whereas in fish muscles, Cu recorded the lowest concentration of the three sectors, while Fe was the highest concentration. The southern part of Burullus Lake had the highest heavy metal values as it influenced by the discharge of massive amounts of domestic sewage as well as agricultural and industrial effluents. The accumulation of heavy metals in fish muscles of the three sectors showed different patterns. Generally, the values of metals in the fish muscles were accepted by the international legislation limits and are safe for human consumption.
Journal of the Egyptian Society of Parasitology
The study reported water quality and the concentrations of heavy metals (Cu, Zn, Fe, Ni, Pb, Mn, Cd, Co, Cr & Hg) in water, muscle and liver of two fish species; Clarias gariepinus (Cat fish) and Oreochromis niloticus (Tilapia fish) obtained from Burullus Lake, Kafr Elsheikh Governorate. These alterations were followed, in the present study, by the occurrence of histological lesions in liver of two fishes collected from the same sites. The results showed that there were high level of the analyzed metals (Fe; 56.63mg/kg, Zn; 28.09mg/kg, Mn; 7.89mg/kg, Pb; 7.87mg/kg, Cr; 5.22mg/kg, Cu; 2.82mg/kg, Co; 2.68mg/kg and Hg; 0.0103 mg/kg) as Fe > Zn > Mn > Pb > Cr > Cu > Co > Hg in C. gariepinus and (Fe; 48.15mg/kg, Zn; 25.41mg/kg, Mn; 7.14 mg/kg, Pb; 5.23 mg/kg, Cu; 1.91mg/kg & Hg; 0.0074mg/kg) as Fe > Zn > Mn > Pb > Cu > Hg in O. niloticus sample compared to WHO standard. So, fish in some sites of Burullus Lake may be not safe for human consumption.
Oceanological and Hydrobiological Studies, 2021
Accumulation of metals (Fe, Zn, Cu, Mn, Pb, Cd and Ni) in the muscles and gills of Oreochromis niloticus, Oreochromis aureus and Tilapia zillii was assessed based on seven locations in the Qahr El-Bahr area in Lake Al-Manzalah. The average accumulation of metals was in the following order: Tilapia zillii > Oreochromis aureus > Oreochromis niloticus. To determine the risk of fish consumption, the estimated daily intake, carcinogenic, non-carcinogenic and relative risk indices were calculated. The results indicate that the intake of individual metals through the consumption of fish is almost safe for human health, whereas the intake of combined metals poses a high potential health risk to consumers. Assessment of carcinogenic risk of Cd and Ni from the consumption of tilapia species indicates that consumers are at risk of cancer. The contribution of Pb and Cd to the overall relative risk index ranged from 34% to 41%. Of the three species studied, Oreochromis niloticus is relativ...
Egyptian Journal of Aquatic Biology and Fisheries, 2005
T he present study was initiated to assess the levels of Fe, Mn, Zn. Cu. Ni. Co. Pb and Cd together with Na, K, Ca and Mg in liver and muscle of Tilapia zillii from three different aquatic ecosystems namely. Lake Manzaiah (Brackish water). Lake Qarun (Saline water) and El-Salam Canal (fresh water) and Oreochromis niloticus from Lake Manzaiah and El-Salam Canal throughout four seasons (1999-2H00). The present results revealed that liver has higher tendency to accumulate Fe and Cu more than the other studied heavy metals for O. niloticus and T. zillii in different studied sites. Zn followed Fe in the accumulation abundance in muscle tissues of the two studied species and Cd was the lowest one. The fluctuation of metal concentrations in muscle tissues for O. niloticus and T. zillii exhibited the following descending order Fe>Zn>Mn=Cu-Ni=Co=Pb>Cd. while the abundance order of the same metals in liver tissues was: Fe>Cu>Zn>Mn>Ni>Co= Pb>Cd.
2020
Heavy metals are of much environmental concern currently. The metals are brought into contact with the organs and tissues of the fish and consequently accumulated to a different extent in different organs and tissues of the fish. These metals are dangerous as they tend to bioaccumulate in the food chain and they can be harmful to human and animals. Nitric acid, HNO 3 (69%), and hydrogen peroxide, H 2 O 2 (30%), were used for digestion. Concentration of Cu, Pb, Ni and Zn were determined in water and fish samples. The analyses of metals in water and fish samples were carried out by both; furnace atomic absorption spectrometry and flame atomic absorption spectrometry.
The levels of lead (Pb), copper (Cu), cadmium (Cd), iron (Fe), zinc (Zn) and manganese (Mn) were measured in water samples and in tissues (liver, kidney, gill, spleen and muscle) of Nile tilapia collected from two locations along the River Nile basin at Greater Cairo in Egypt. We investigated the impact of these traces of heavy metals on the physiology, immune responses, genotoxicity and histology of Nile tilapia. The concentrations of heavy metals in water samples from polluted area (El-Tebeen, Area 2) were significantly higher than reference area (El-Zamalek, Area 1) for all investigated metals. The prevalence of each element in various fish tissues was variable between the two sampling areas. The level of plasma total proteins was significantly (P< 0.001) elevated in Area 2 compared to Area 1. Lysozyme levels were insignificantly declined in plasma of fish from Area 2 while phagocytosis percentage was markedly reduced (P< 0.001) in Area 2 compared to Area 1. DNA damage (comet assay) in blood elevated statistically in tilapia collected from Area 2 compared to Area 1. Additionally, numerous histopathological alterations were observed in Area 2.Thus, innate immune responses of tilapia could be sensitive to environmental contamination.
Egyptian Journal of Aquatic Biology and Fisheries, 2001
P ollution of surface water has increased due to the industrial effluents, waste municipal and agricultural drainage water that discharge directly into it. The present study measured the concentrations of some heavy metals (Fe, Cu, Zn> Pb and Cd) in water, sediment and Nile tilapia fish collected from certain Egyptian lakes (Maryut, Manzala, El-Burullus, Edku and Qarun), a polluted site of the River Nile (Shubra El-Khiema, Cairo sector), in addition to Ismalia canal (El-Abbassa region). The results revealed that fish collected from the polluted site of the River Nile and the studied lakes (Maryut, Manzala, El-Burullus and Edku) showed the lowest growth factor, hepalosomatic index, meat quality and disturbances in the studied physiological state as indicated by the increase in serum glucose, total protein, AST, ALT, alkaline phosphstase, creatinine, uric acid and a decrease in serum total lipids. In comparison, fish collected from lake Qarun exhibited higher levels of meat quality and growth indices than those collected from the other studied sites and showed normal levels in the different examined biochemical parameters as those of the control group collected from Ismalia canal. Chemical analyses of water samples suggested that high salinity, total alkalinity and total hardness in lake Qarun might have inhibited the bioaccumulation of any of the studied heavy metals
International Journal of Chemistry and Materials Research
The purpose of this study was to determine the concentration of heavy metals in Lake Hayq water and fish muscles samples during dry and wet seasons. Samples of fish organs and water were collected from four sampling sites of Lake Hayq. An optimal procedure required 8 mL of (69%) HNO3 and 6 mL of (30%) H2O2 to mineralize powdered samples in open refluxed digestion vessels: 0.5 g of the fish body for 2:30 hrs at temperature of 130oc.Concentrations of six metals (Pb, Ni, Zn, Cd, Cu and Cr) in water and their accumulation in the edible tissue of Nile Tilapia were determined by FAAS. The results revealed that the average heavy metal concentrations in water samples were; Pb (0.006), Ni (0.018), Zn (0.083), Cd (0.004), Cu (0.1) and Cr (0.003) mg/L in the lake. The average concentration of heavy metals in fish samples were; Pb (2.02), Ni (2.29), Zn (55.52), Cd (1.57), Cu (11.18) and Cr (0.745) mg/Kg. Among the detected metals, zinc (Zn) showed a maximum accumulation in the edible muscle of Nile Tilapia fish from Lake Hayq. The concentrations of the metals (Pb, Zn, Cd, and Cu) were below the recommended limit by WHO, USEPA and FAO. For fish the highest accumulations of nickel (Ni) and chromium (Cr) concentration were observed above the recommended limit by FAO/ WHO. Application of the statistical t-test on heavy metal analysis has shown that there was no significant difference between fish as well as water samples of the lake for all sites. Contribution/Originality: The paper's primary contributions is finding the pollution of the aquatic environment of heavy metals water and fish muscles samples during dry and wet seasons and produce an information of edible fish quality by standards of WHO/FAO, especially concern in South Wollo, Lake Hayq. 1. INTRODUCTION The pollution of the aquatic environment with heavy metals has become a worldwide problem and of scientific concern because the metals are indestructible and most of them have toxic effects on organisms [1, 2]. Heavy metals enter rivers and lakes from a variety of sources that include the rocks and soils directly exposed to surface water, in addition to the discharge of various treated and untreated liquid wastes to the water bodies [3, 4]. There are more than ten heavy metals such as cobalt (Co), lead (Pb), mercury (Hg), arsenic (As), thallium (Ti), nickel (Ni),manganese (Mn), zinc (Zn), cadmium (Cd) and chromium (Cr) that have a particular significance in ecotoxicology [5]. Some heavy metals such as copper (Cu), zinc (Zn), iron (Fe), chromium (Cr), manganese (Mn) and nickel (Ni) though essential to human body, are toxic at elevated levels, whereas cadmium (Cd) and lead (Pb) are non-essential metals and are toxic even in trace amounts. Toxicity is highly aggravated by their nondegradability and tendency to bio-accumulate to toxic levels [6]. Heavy metal toxicity can result in lower levels
Egyptian Journal of Aquatic Biology and Fisheries
The present study was conducted to assess the water quality and bioaccumulation of heavy metals (Cd, Cu, Pb, and Zn) in tissues of the tilapia fish (Oreochromis niloticus) and shrimp (Metapenaeus affinis), which were caught from Shatt al-Arab river near Al-Najibiya power plant in Basrah, Iraq during Mar 2018-Feb 2019. Aquatic samples consisted of raw water from the river, drainage channel water, and demi water from the inside electric power plant. 10 parameters including the electrical conductivity, total dissolved solids, total suspended solids, the concentration of hydrogen ions, calcium, magnesium, chloride, sulphate, phosphate, and temperature were examined. The results designated that a deterioration in the water quality of Shatt al-Arab was observed during the hot months, especially in the summer season of 2018. The conductivity rates were higher than the permissible limits compared to demi industrial water. Occurrence of heavy element concentrations of Cd, and Pb were in slightly higher average level in water samples collected from river raw water (0.62 and 0.14 mg/l) and drainage chanal water (0.17 and 0.15 mg/l) respectively. The concentration average of the heavy metals in the investigated parts (muscle, gill, and liver) of the studied fish could be found with significant variation among examined tissues. The current study concluded that the metal concentrations in muscles of the tilapia fish and the edible parts from studied shrimps were within the limits permitted for human consumption.
The health risk assessment of heavy metals to human health through the consumption of Tilapia spp and catfish caught from Lake Mariut, Egypt, 2022
The levels of As, Cd, Pb, Hg and Al were measured in the flesh of C. gariepinus, O. niloticus, O. aureus, and T. zillii fish. Association between the potential risk of HMs exposure and the consumption of fish by adults, youth, and children was studied. Estimated dietary intakes, target hazard quotient, and the carcinogenic risk were used to assess the human health risk.