Toxicity and risk evaluation of polychlorinated biphenyls in River Otamiri, Imo State

Eze, Victor C.; Onwukeme, Valentine I.; Ogbuagu, Josephat O.; Aralu, Chiedozie C.

doi:10.1016/j.sciaf.2023.e01983

Cited by 11 publications

(5 citation statements)

References 21 publications

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“…The speciation of Ni follows the order; Residual > carbonates > Fe-Mn oxide > organic > exchangeable with their fractions to be 7.28±0.02, 7.01±0.01, 4.12±0.02, 3.27±0.03 and 3.07±0.10 respectively. This finding is consistent with some researches [17,20,21,[27][28][29][30][31][32][33].…”

Section: Nickel (Ni)supporting

confidence: 93%

Chemical fractionation and mobility factor of some heavy metals in refuse dumpsite soil in Awka Metropolis, Anambra State, Nigeria

Okakpu,

Okoye,

Onuegbu

2024

Chem. Rep.

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The geochemical forms of some heavy metals in refuse dump soils at Agu-Awka, Awka metropolis was studied in order to assess the mobility and bioavailability of the metals and hence their potential environmental risk. Exchangeable fraction (F1) contained the % fraction of 13.23% for Cd, 17.43% for Cr, 14.63% for Pb, 12.40% for Ni, 25.34% for Zn and 15.92% for Mn and these are in the order of Zn ˃ Cr ˃ Mn ˃ Pb ˃ Cd ˃ Ni. The carbonate fraction (F2) contained the % fraction of 17.08% for Cd, 17.84% for Cr, 9.20% for Pb, 28.32% for Ni, 13.76% for Zn and 8.49% for Mn and these are in the order of Ni ˃ Cr ˃ Cd ˃ Zn ˃ Pb ˃ Mn. Lead was predominantly associated with organic fraction with a result of 42.64% followed by chromium and manganese with the values of 22.48% and 20.00% respectively. The organic bound metals were in the abundance trend of Pb ˃ Cr ˃ Mn ˃ Cd ˃ Ni ˃ Zn. The highest values of metal in Fe-Mn oxide phase was manganese with a value of 32.18%, followed by cadmium with the value of 21.76%. The values of the other metals bound to this phase were 17.52%, 16.64%, 13.99% and 12.90% for Zn, Ni, Cr, and Pb respectively. Zinc with the value of 32.20% was predominantly associated with the residual fraction. The other metals bound to this phase had their values to be 30.13% for cadmium, 28.24% for chromium, 20.61% for lead, 29.41% for nickel and 23.37% for manganese. The mobility factor values of the metals were relatively low and they followed the order of Ni > Zn > Cr > Cd > Mn > Pb. That notwithstanding, soils from studied area should be carefully monitored to prevent the release of these metals due to redox reactions which may make them available to plants through absorption.

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Section: Nickel (Ni)supporting

confidence: 93%

Chemical fractionation and mobility factor of some heavy metals in refuse dumpsite soil in Awka Metropolis, Anambra State, Nigeria

Okakpu,

Okoye,

Onuegbu

2024

Chem. Rep.

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“…It is on Latitude 4 o 54' 14.00" N and Longitude 7 o 08' 30.00" E. The river flows into the Atlantic Ocean at Ozuzu in the Etche Local Government Area of River State after travelling south from Egbu via Owerri, Nekede, Ihiagwa, Eziobodo, Olokwu Umuisi, Mgbirichi, and Umuagwo [3,30,32]. The river is 30 kilometers long from its source to where it joins the Uramiriukwa River at Emeabian [33,34]. The Otamiri watershed covers about 10,000 km 2 with an annual rainfall of 2250-2500 mm [33].…”

Section: Description Of Study Areamentioning

confidence: 99%

“…The watershed is mainly surrounded by depleted rainforest vegetation, with a mean temperature of 27 0 C throughout the year [35]. The Nworie River joins the Otamiri at Nekede in Owerri, a river about 9.2 km long [34]. The Otamiri River is frequently used for industrial and human purposes.…”

Section: Description Of Study Areamentioning

confidence: 99%

Evaluation of selected physicochemical properties of River Otamiri, Imo State

Eze,

Onwukeme,

Ogbuagu

et al. 2024

Health Environ.

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Surface water monitoring is essential, especially when the water is normally used for industrial, agricultural, and domestic purposes. The study determined the physicochemical properties of the River Otamiri using the American Public Health Association standard methods for water analysis. In this study, river water samples were collected five times during the dry season from four sampling points (WSP-1, WSP-2, WSP-3 and WSP-4) along the watercourse of the river in Owerri West Local Government Area of Imo State. The levels of the selected physicochemical parameters were compared with the National Standard for Drinking Water Quality (NSDWQ) guidelines. The findings showed that the pH (4.99±0.11 – 6.30±0.08), dissolved oxygen (4.16±0.01 – 6.45±0.03), total hardness (17.10±1.78 – 27.80±2.54), chloride (68.30±0.58 – 91.90±0.64), and sulphate (39.55±3.32 – 51.21±2.11) were below the acceptable limit of the National Standard for Drinking Water Quality (NSDWQ). However, electrical conductivity (1116±29.75 – 1419±28.54), turbidity (18.90±2.81 – 31.70±8.13) and nitrate (45.50±3.06 – 69.90±2.11, except in water sample point-4) were above the recommended limit according to the NSDWQ guideline, while temperature levels (26.90±0.04 – 28.40±0.02) were within the acceptable limit. The study concludes that the River Otamiri is contaminated. It is therefore advisable to purify water from the river before use for domestic and industrial purposes.

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“…The temperature values of the surface water and sediments were within the ambient temperature range stipulated by FMEV which is in agreement with the findings of [23,24] in Otammiri River. The temperature values reported were due to the climatic condition of the study area [25,26,27…”

Section: Discussionmentioning

confidence: 99%

Assessment of Microplastic Pollution in Surface Water and Sediments of Otammiri River, Imo State, Nigeria

Chidimma Adamma,

Nwabueze,

Ifeyinwa

et al. 2024

J. Adv. Biol. Biotechnol.

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This study analyzed the physicochemical and heavy metal status and also quantified microplastics from Otammiri River, Imo state, Nigeria. The physicochemical and heavy metal analysis were carried out using procedures of Federal Environmental Protection Agency. The quantification of the microplastics from Otammiri River was carried out according to the National Oceanic and Atmospheric Administration (NOAA) protocol for surface water trawling for microplastics. The microplastics quantified in this study were at the range of 0.3 mm to 5mm that were resistance to wet oxidation and exhibited flotation in a 5M NaCl. The result of the physicochemical parameters showed that the parameters were within the Federal Ministry of Environment (FMEV) permissible limits with exception to lead and mercury. The microplastics concentrations at the surface water of Otammiri River was between 0.12 g to 2.50 g and in sediments samples, between 0.01 g to 1.37 g.

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Toxicity and risk evaluation of polychlorinated biphenyls in River Otamiri, Imo State

Cited by 11 publications

References 21 publications

Chemical fractionation and mobility factor of some heavy metals in refuse dumpsite soil in Awka Metropolis, Anambra State, Nigeria

Chemical fractionation and mobility factor of some heavy metals in refuse dumpsite soil in Awka Metropolis, Anambra State, Nigeria

Evaluation of selected physicochemical properties of River Otamiri, Imo State

Assessment of Microplastic Pollution in Surface Water and Sediments of Otammiri River, Imo State, Nigeria

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