Correlation between Heavy Metals in Fish and Sediment in Sakumo and Kpeshie Lagoons, Ghana (original) (raw)
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ASSESSMENT OF HEAVY METAL LEVELS IN FISH TISSUES, WATER AND SEDIMENT FROM EPE LAGOON, LAGOS, NIGERIA
SCIENCE WORLD JOURNAL, 2021
Pollution of heavy metal in water bodies is a threat to public water supplies and also to consumer of fishery sources. This study aimed at investigating the distribution of heavy metals in some fish species, water column and sediment of Epe Lagoon. Water samples, sediments and ten fish species (Synodontis schall, Chrysichthys nigrodigitatus, Megalaspis cordyla, Ulua mentalis, Caranx hippos, Tilapia guineensis, Marcusenius cyprinoides, Xenomystus nigri, Oreochromic niloticus, Clarias gariepinus) were sampled in 2019. Heavy metals (Zinc, Copper, Manganese, Iron, Lead and Cadmium) were detected in three matrices including fish tissues, water and sediment using Atomic Absorption Spectrophotometer (AAS). The heavy metal level ranges of the metals detected were: Zn: 1.128 to 4.875 mg/kg; Cu: ND to 0.488 mg/kg; Mn: 0.5 to 7.480 mg/kg; Fe: 0.125 to 9.125 mg/kg; Pb: ND to 0.875 mg/kg; and Cd: 1.750 to 2.750 mg/kg. The highest mean concentration of the heavy metal in all fish species is Zn, followed by Mn, Cd, Fe, Cu and Pb. The mean concentration of metals determined in the water samples ranged from 0.020-0.635 mg/L and for sediments the range was 0.669-17.453 mg/kg. The results obtained show high levels of Mn, Fe and Cd in some fish species which can pose danger to consumers of foods and water from this Lagoon. There is therefore the need for continual assessment of the level of pollution of this Lagoon with a view to reducing this level via sensitization and education.
Determination of Heavy Metals in the Black-Chin Tilapia from the Sakumo Lagoon, Ghana
Samples of the Black-chin Tilapia were analyzed for the concentration of heavy metals (Arsenic, cadmium, chromium, copper, iron, mercury, nickel and zinc) using atomic absorption spectrophotometry and instrumental neutron activation analysis. The sequence of order of the heavy metals measured in the fish samples observed from the Sakumo lagoon was as follows: Fe > Cu > Mn> V> Hg > Cd, respectively. The results showed elevated levels of iron, copper and managanese in all the fish samples although mercury and cadmium were available in relatively low concentration in the most of the fish samples. Fe, Mn, and Zn concentration in fish were greater than WHO/FAO certified values. Hazard index < 1 suggests unlikely adverse health effects whereas HI $ 1 suggests the probability of adverse health effects. Although the heavy metals analysed in Blackchin Tilapia did not pose any immediate health risk to humans but due to the bioaccumulation and magnification of these heavy met...
Cadmium (Cd), copper, (Cu), Iron (Fe), lead (Pb), and zinc (Zn) burdens were determined by atomic absorption spectrophotometr y (AAS) in two tropical fish species (Chloroscombrus chrysurus and Sardinella maderensis) from the western coast of Ghana. Fish samples were collected during three ) at three sites (Half-Assini, Aboadze and Elmina). Trace elements and heavy metal concentrations in both species followed the order Fe>Zn>Cu while Cd and Pb were below detection limits. High levels of Fe were detected in the fish samples with concentration ranges of 13.05-376.4 µg/g dw. Levels of Cu generally recorded during Period 1 were above FAO maximum recommended limits of 30 µg/g in fish while Zn burdens were below FAO recommended limit of 40 µg/g. S. maderensis and C. chrysurus, can be considered safe for human consumption with respect to Cd, Pb and Zn contaminations. However, Cu will require further monitoring to protect public health. Hazard quotients and hazard indices computed indicate that metal exposure from consumption of the two fish species will not result in any appreciable health risk. Levels of Cu and Zn recorded may however pose threats to physiological functioning of fish since levels were high enough to cause sublethal effects to fish. Metal burdens studied provide background information prior to the commercial exploitation of oil in Ghana's marine waters.
Accumulation Profile of Heavy Metals in Fish Samples from Nsawam, Along the Densu River, Ghana
The present study was carried out to investigate the accumulation profile of heavy metals in five fish species namely; Heterotis niloticus, Channa obscura, Hepsetus odoe, Tilapia zilli and Clarias gariepinus. Concentrations of Fe, Mn, Cu, Zn, Ca, Cd, and Pb were measured in all the sam ples analysed. Ni, Co and Cr however, recorded 80, 60 and 20% incidence respectively in the fish samples. The highest mean concentration, 110.56±0.86 mg/kg was recorded for Cu in Hepsetus odoe. Ni, Co, and Cr measured relatively lower concentrations from as low as <0.01 mg/kg, <0.005 mg/kg and <0.001 mg/kg respectively been their respective detection limits. The least detectable concentration, 0.08±0.01 mg/kg was measured for Pb in Clarias gariepinus. Most of the heavy metals were within the recommended maximum guidelines. The concentration of Cu measured in all the samples however, exceeded the FAO maximum limit of 30 mg/kg. Similarly, the concentration of Mn measured in all the fish samples...
Assessment of Heavy Metals in Water and Sediments of Sakumo II, Chemu and Kpeshie Lagoons - Ghana
West African Journal of Applied Ecology, 2018
This study aimed at assessing the levels of heavy metal pollution in selected lagoons within the Greater Accra Region of Ghana. Water and sediment samples were collected during the dry and wet seasons from selected lagoons, namely; Sakumo II, Chemu and Kpeshie lagoons. The study areas were selected due to the reliance of the people on the lagoons for their livelihood. The lagoons also serve as habitat for diverse fish species. Analysis of the samples were done using the Fast-Sequential Atomic Absorption Spectrometer (VARIAN AA 240FS) fitted with deuterium background corrector. Results from the heavy metals determined (Cu, Pb, Fe, Ni, Zn, and Mn) were compared with the EPA, WHO and USEPA recommended limits, which indicated significant differences in concentrations between the two seasons. The concentration of Copper in the water samples ranged from 2.87 - 3.95 mg/L for Sakumo II lagoon, 8.32-9.39 mg/L for Chemu lagoon and 6.10-6.84 mg/L for Kpeshie lagoon during the dry season. Copp...
Concentrations of heavy metals in two Ghanaian Lagoons
2011
The study was conducated in Benya and Nakwa lagoons in the Central Region of Ghana, to assess the level of heavy metal pollution of the water and its sediment, as well as in two species of fish: the black chin tilapia (Sarotherodon melanotheron) and oyster (Crassostrea tulipa) both of which constitute one of the major sources of protein for the local people of Elmina and Nakwa. It was also to find out the effect of cooking and depuration (of oysters) on the heavy metal content of the biota. The method involves collection of samples of the species with cast net, scaled and gutted. But the oyster samples were hand-picked. Each sample was divided into two, weighing 500 g. each. One portion was boiled and the other part was dried to a constant weight. The oyster sample was similarly treated. The oyster sample was divided into two, one depurated and the other half not depurated. Water and sediment samples from the lagoons were also collected for analysis at WRI of CSIR.. The results indicated that cooking significantly reduced the concentration of Pb in Crassostrea tulipa from Nakwa but increased concentration of Cd, Pb. As and Hg in S. melanotheron, significantly. Depuration significantly reduced As and Cd concentration in C. tulipa from Benya, but raised the concentration of Pb and Hg in C. tulipa from Benya.
E-Journal of Chemistry, 2010
Water samples, sediments, tilapia and cat fishes from each of Epe and Badagry lagoons in Lagos State, Nigeria were analyzed quantitatively for the presence of zinc, nickel and iron using Perking Elmer atomic absorption spectrophotometer. The sediment contains higher concentration of Fe with a value of 13.30 µg/g against 8.400 µg/g in fishes and 7.30 mg/L in water. Studies on the different parts of the fish revealed higher concentrations of 4.00 µg/g Ni on the head of tilapia fish followed by 2.40 µg/g Ni in the intestine of cat fish. The highest concentration of 1.95 µg/g Zn was detected on the head of the cat fish while the lowest concentration with a value of 0.16 µg/g was recorded in tilapia head. The concentration of Zn in the water is within the limits permitted by the Lagos State Environmental Protection Agency (LASEPA) of 1.0 mg/L Zn set for water. None of the trace metals investigated was above the maximum permissible level set by world health organization ( WHO).
Heavy Metal Concentration in Eight Fish Species from Epe Lagoon (Nigeria)
Transylvanian Review of Systematical and Ecological Research
This research was undertaken to find out the levels of five heavy metals (Cu, Fe, Mn, Pb, and Zn) in the muscles of eight fish species from Epe Lagoon. The levels of heavy metals were determined by atomic absorption spectrophotometry after digestion of the samples using Kjldahl heating digester. The heavy metal concentrations among the fish species were statistically dissimilar (P < 0.5). The heavy metals of Pb, Fe, and Mn were above the FAO/WHO agreeable limits for human consumption.
Journal of Natural Sciences Research, 2014
The purpose of the study was to gather information and evaluate the status of fish produced in the Black Volta of Northern Region in terms of Heavy metals in order to protect public health. Fish were selected based on weight and size. Three fish species which are commercially available were selected. The three fish species were bought from fishermen at the water body for four months. The concentration of metals (Zn, Pb, Fe, Mn, Cu and Cd) was determined using atomic absorption spectrometry.