Heavy metal profile of water, sediment and freshwater cat fish, Chrysichthys nigrodigitatus (Siluriformes: Bagridae), of Cross River, Nigeria

Distribution and Potential Environmental Risks of Heavy Metals in Riverine Sediments of Maa-Dee-Tai River in Sogho Community, Ogoniland, Rivers State, Nigeria

“…This assessment revealed that the concentration of Ni is below those in New Calabar River, Rivers State of Nigeria, where its value is 4.537±0.427mg/Kg but above those of Bodo Creek [50,51]. However, Maa-Dee-River shows no significant difference with other rivers within Niger Delta [55,56]. It is lower than the permissive limit for Ni set by DPR.…”

Heavy metals contamination of seafood from the crude oil-impacted Niger Delta Region of Nigeria: A systematic review and meta-analysis

“… AAS 120 Cu (0.001–0.031), Fe (0.043–0.71), Pb (0.003–0.005), Cr (BDL), Co (BDL), Cd (BDL- 0.004), Zn (0.003–0.006) mg/kg dry wt. [57] Inyang2002 Estuaries of Escravos, Forcados, Brass, Nun, Bonny, Andoni, Imo, Qua Iboe and Cross Rivers /Niger Delta Region AAS 63 Cu (1.32–2.03), Pb (BDL- 1.33), Cd (BDL- 0.1), Fe (BDL-33), Zn (5.01–8.65), Ni (1.37–2.56), Cr (BDL), Mn (0.16–1.05), Co (BDL- 0.07), Hg (BDL- 0.05) mg/kg wet wt. [24] Eboh2006 Rivers in Oron Local Government Area /Akwa Ibom State AAS 120–125 Cu (0.01–0.02), Zn (0.01–0.001), Pb (0.001–0.002), Hg (<0.001), As (< 0.001), Cr (<0.001), Cd (< 0.001) mg/kg wet wt.…”

Metal and metalloid concentrations in marine fish marketed in Salvador, BA, northeastern Brazil, and associated human health risks

“…Over the years, high concentrations of trace metals and metalloids such as As, Hg, Pb and Cd, have been discharged into the aquatic environment through effluents from urban centers, agriculture and industries (Arantes et al, 2016;Bilandžić et al, 2011). High levels of these chemical elements in the environment significantly influence water quality (Filippini et al, 2018) and are considered to be the most important source of contamination in marine ecosystems (Ayotunde et al, 2012), due to the non-degradability of heavy metals and their accumulative power in living organisms, especially in fish (Okyere et al, 2015;Trevizani et al, 2019).…”

“…Fish is also one of the foods that mostly contribute to metal intake by humans, as these compounds accumulate in fish tissues and may reach toxic concentrations through trophic biomagnification (Olmedo et al, 2013;Núñez et al, 2018). This is considered potentially responsible for causing damage or reduction of central and nervous functions, lower metabolic energy levels, problems in the blood and vital organs and a series of other health risks (Ayotunde et al, 2012;Bilandžić et al, 2011).…”