Occurrence and Impact of Heavy Metals on Some Water, Land, Flora and Fauna Resources across Southwestern Nigeria

Akinnifesi, Olufemi J.; Adesina, Femi; Ogunwole, Germaine Akinola; Abiya, Sylvanus Efetobor

doi:10.5772/intechopen.94982

Cited by 6 publications

(2 citation statements)

References 57 publications

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“…Heavy metals from such polluted sites are introduced directly through surface runoff into water bodies or indirectly through non-point source contaminants washed into water bodies [25]. In China, trace metals (As, Mn, Cr, Ni, Cu, Cd, Pb, and Zn) in water from mining sites and industrial locations were evaluated against their concentrations with the guidelines for drinking water versus surface water established by the China Environment Protect Agency (EPA) in 2002 and 2006.…”

Section: Industrial Sector Geo-mining (Quarry Blasting Crude Oil Mining)mentioning

confidence: 99%

Analysis of Trace Metal Bioaccumulation in Fish and Man; Health Risk Impact

Agbugui¹,

Abe²

2023

IJFAR

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Trace metals occur during natural processes and are also obtained during anthropogenic activities. Streams, lakes and rivers surrounded by farmlands engaged in the use of Trace metal-enriched fertilizers have shown a possible and positive correlation to the rise of Trace metals in the use of chemical, organic and water-soluble fertilizers for a long period. there is a tendency for high correlations of trace metals in source waters. Furthermore, the increasing level of trace metals in fish is alarming and has spurred scientists to make research on the dangers caused by the trace metals resulting in trace metal accumulation and bioaccumulation of life cells. This study aims at assessing the possible sources of trace metals in the aquatic environment, the impact of Trace metals in the aquatic environment, their bioaccumulation in fish and human health risk impact, negative effects in fish have been attributed to the accumulation of trace metals such as irritation of the gastrointestinal mucosa, nephritis, necrosis, neurological and behavioural disorders and death amongst others). The ingestion, absorption and uptake of trace metals in fish are usually toxic and result in harmful damage to the fish and fish life. Since most of the metals taken up are non-biodegradable, such metals can bioaccumulate and bio-magnify. Over time, the accumulated metals affect the growth and development stages of fish from the production of viable eggs, hatchability laval, fingerlings and juvenile life stages. This is so because the early life stages are more sensitive than during maturing and adulthood. In conclusion, negative results of the presence of trace metals and the effect of bioaccumulation and bio-magnification have been reviewed in this paper. This study recommends that the proper assessment and treatment of all forms of wastewater, agricultural waste, sewage, and industrial effluents be carried out before their discharge into the environment.

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Section: Industrial Sector Geo-mining (Quarry Blasting Crude Oil Mining)mentioning

confidence: 99%

Analysis of Trace Metal Bioaccumulation in Fish and Man; Health Risk Impact

Agbugui¹,

Abe²

2023

IJFAR

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“…Apart from implications on human health [35] , intensities of inorganic and organic substances in water bodies may threaten health of aquatic organisms including fish [7] . Heavy metal are exclusive naturally occurring elements that persevere in the environment for long time and may not be eco-friendly [11] . Heavy metal are naturally found in the Earth's crust.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2023

Int. J. Fish. Aquat. Stud.

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This research studied heavy metal variations in organs of Clarias gariepinus and Tilapia dageti from landing sites by lower Benue River at Ibi, Taraba State, Nigeria. The results of heavy metal variations examined showed C. gariepinus recorded higher concentrations of the metals compare to T. dageti. Among the metals studied zinc (Zn) values were higher for both species while cadmium (Cd) values were lower. Ranking profile in organs was: liver >Gills > muscles with metal in order of Zn > Pb > Cu > Cd. Concentration of metals varied significantly (p<0.05) in organs for T. dageti. Zinc (Zn) recorded higher concentration (1.2000 mg/kg) while cadmium recorded lower values (0.0034 mg/kg). Also the correlation results during the study for the two species showed C. gariepinus have a strong association with the heavy metals compare to T. dageti. The Correlation association of heavy metals for cadmium (Cd) showed there was significant difference (p<0.05) for affinity for metal between the species. However, Lead (Pb) concentrations showed weak correlation between C. gariepinus and T. dageti during the study period. The correlation results also showed significant difference (p<0.05) in zinc (Zn) concentrations for C. gariepinus compare to T. dageti. Results of this study ascertained occurrence of heavy metals in lower river Benue and that variations in levels affect fish. All metals studied were within safe range for fish and fisheries product by the Food and Agricultural Organization (FAO)/World Health Organization (WHO) in the two species. However continuous monitoring and check on fish species for heavy metals load should be encourage and sustained. Heavy metals concentrations should also be investigated in other commercial species of the river to assess their safety for consumption and routine studies of the river water should also be sustained.

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