Bioaccumulation of heavy metals in two matrices of the Bonny/New Calabar River Estuary in Niger Delta, Nigeria

Onojake, M. C.; Sikoki, F.D.; Babatunde, B. B.; Akpiri, Rachael Ununuma; Akpuloma, D.; Omokheyeke, O.

doi:10.1007/s12601-015-0016-2

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…The variations observed could be attributable to the dump heap within the area. However, the values of the DO record were higher than those reported on the Bonny/New Calabar River by [43].…”

Section: Biochemical Oxygen Demand (Bod)contrasting

confidence: 64%

Distribution of Toxic Metals in Biota, Sediments and Water from a Polluted Mangrove Swamp in Rivers State

Davies¹,

Odekina²,

Akoko³

2022

JGEESI

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Concentrations of Pb, Cd, and As were investigated in the tissues of mudskippers (Periophthalmus papilio), water, and sediments from Isaka-Bundu mangrove swamp in the Upper reach of Bonny Estuary, Niger Delta, Nigeria. The samples were collected from three stations every week for three months. The trace metals and physicochemical parameters were determined according to APHA 2000 methods. The concentration of trace metals by stations followed the order: station III (Dockyard) > station II (Bundu-Ama) > station I (Isaka). The trace metal distribution sequence in the fish, water and sediment according to their stations followed this sequence: Dockyard (Sediment = Pb > Cd > As; Water = Pb > Cd > As; Fish = Pb > As > Cd); Isaka (Sediment = Pb > Cd > As; Water = Pb > Cd > As; Fish = Pb > As > Cd); Bundu Ama (Sediment = Pb > Cd > As; Water = Pb > Cd > As; Fish = Pb = As > Cd). The overall, trace metal concentrations by samples followed this sequence; (Sediment = Pb > Cd > As; Water = Pb > Cd >As; and the mudskippers (P. papilio) = Pb > As > Cd) across the stations. The study revealed that all sampled sites in the Isaka-Bundu mangrove swamp had heavy metal values within Joint FEPA/WHO recommended biota load limits. High significant values of Pb and Cd were observed in sediment and water across the three stations, while tissue concentration of all three metals was relatively low and uniform. If proper measures are not taken to curb the excess discharges into the river given the activities in the catchment, the condition of the river will deteriorate badly and become a menace to its inhabitants and the host community which depends on it directly or indirectly.

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Section: Biochemical Oxygen Demand (Bod)contrasting

confidence: 64%

Distribution of Toxic Metals in Biota, Sediments and Water from a Polluted Mangrove Swamp in Rivers State

Davies¹,

Odekina²,

Akoko³

2022

JGEESI

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“…HNO 3 and HCl acids (1:1 ratio). The mixture was vigorously shaken in a mechanical shaker and then filtered through Whatchman filter paper No 42 as reported in Onojake et al [8]. All acid used were of analytical grade quality and control was assured by the use of procedural blanks and spikes.…”

Section: Sample Collection and Data Analysismentioning

confidence: 99%

“…Researchers such as Onojake et al [8], reported that the concentrations of some heavy metals in some seafood (Oyester, Mullet and Crab) in the Bonny/New Calabar River Estuary, have the following ranges: Zn (0.24 -1.28 mg/kg), Pb (0.23 -0.30 mg/kg), Cd (0.05 -0.09 mg/kg), Co (0.20 -0.28 mg/kg), Cr(1. 17 Similarly, values of metals recorded in other Nigerian water bodies indicates low metal concentrations Cu>Cr>Pb>Cd [10].…”

Section: Introductionmentioning

confidence: 99%

Poisonous Metal Levels in Sediment and Selected Biota in Coastal Waters of Nigeria

Sikoki

Onojake

Omokheyeke

et al. 2021

AJOCS

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Sediment and biota samples were collected biannually from the Bonny/New Calabar River Estuary in Niger Delta, Nigeria and analysed for poisonous metals of interest to the International Atomic Energy Agency (Pb, Cd, and Hg) using atomic absorption spectrophotometer A-500 and Direct Mercury analyser (DMA-80). Results for biota showed that Cd ranged from 0.003 to 0.558 ± 0.01mg/kg, Hg ranged from 0.014 ± 0.004 to 0.021± 0.010 mg/kg, Sediment: Cd ranged from 0.022 ± 0.001 – 0.82 ± 0.0002 mg/kg; Hg 0.010 ± 0.005 to 0.027 ± 0.009 mg/kg. Lead was below the detection limit of the instrument both in biota and sediment. The concentrations of the respective poisonous metals were within the permissible limit of the World health organization. The study showed high concentration of Cd in Crayfish compared to other seafood. The bioaccumulation factor showed higher level of Hg compared Cd while the Analysis of variance for the three stations did not show any significant variation among the three stations. Regular monitoring and comparison of level of contamination with regulatory bodies are advocated to prevent the concentration of the metal contaminants from getting to an alarming level.

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Metal accumulation in the marine bivalve, Marcia optima collected from the coastal area of Phuket Bay, Thailand

Akkajit

Fajriati

Assawadithalerd

2018

Environ Sci Pollut Res

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Bioaccumulation of heavy metals in two matrices of the Bonny/New Calabar River Estuary in Niger Delta, Nigeria

Cited by 8 publications

References 7 publications

Distribution of Toxic Metals in Biota, Sediments and Water from a Polluted Mangrove Swamp in Rivers State

Distribution of Toxic Metals in Biota, Sediments and Water from a Polluted Mangrove Swamp in Rivers State

Poisonous Metal Levels in Sediment and Selected Biota in Coastal Waters of Nigeria

Metal accumulation in the marine bivalve, Marcia optima collected from the coastal area of Phuket Bay, Thailand

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