Evaluating the potential health risks of heavy metal pollution in sediment and selected benthic fauna of Benin River, Southern Nigeria

Enuneku, Alex Ajeh; Omoruyi, Osaretin; Tongo, Isioma; Ogbomida, Emmanuel Temiotan; Ogbeide, Ozekeke; Ezemonye, Lawrence Ikechukwu

doi:10.1007/s13201-018-0873-9

Cited by 69 publications

(48 citation statements)

References 38 publications

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“…have been developed, and these indices have been successfully used in numerous studies [55][56][57][58] . We used I geo , EF, CF, and PLI to assess heavy metal pollution in Lake Bafa.…”

Section: Sediment Pollution Indices Various Pollution Indices For Asmentioning

confidence: 99%

Concentrations and sources of heavy metals in shallow sediments in Lake Bafa, Turkey

Algül

Beyhan

2020

Sci Rep

130

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the concentrations and sources of heavy metals in shallow sediments in Lake Bafa were investigated. the concentrations of nine heavy metals and the total organic carbon content in sediment samples were determined for between Summer 2015 and Spring 2016. The mean contents of heavy metals were in decreasing order fe > Mn > ni > cr > Zn > cu > co > pb > cd. Sediment quality guidelines indicate that Cr, Cu, and Ni pose a considerable threat to the aquatic ecosystem in Lake Bafa. Site L3 was found to be contaminated with cd, cr, and ni, and the pollution load indices suggest that these metals had anthropogenic sources. the sediment samples were notably enriched with cd and ni. there is no consistent trend for seasonal effect in terms of the sample locations. However, at all sampling points, an increase in heavy metal concentrations was observed in the autumn. the results of a multivariate analysis indicate that the sources of co, cu, fe, Mn, pb, and Zn were all natural, the sources of cd were anthropogenic, and the sources of ni and cr were both anthropogenic and natural. these results highlight that cd, cr, and particularly ni represent the most serious threat in terms of heavy metal pollution in the ecosystem of the lake. Heavy metals mainly enter aquatic environments as a result of a variety of human activities (e.g., agriculture, combustion, corroded underground pipes, industrial plants, sewage, smelting, and vehicles) 1-3. Exposure to heavy metals has been linked to various negative health effects, including cancer, behavioural problems, impaired intelligence, developmental problems, kidney damage, and miscarriage or stillbirth 4. Heavy metals are not readily degraded in the environment, and those that enter a water body can remain there for some time. They are usually found in low concentrations in aquatic systems 5 , and high concentrations of heavy metals in sediments can indicate anthropogenic rather than natural sources 6,7. Heavy metals are poorly soluble in water, so predominantly sorb to suspended particles that then settle as sediment 8. Heavy metals can thus enter the food chain in the aquatic environment, and become available for accumulation in biota 9. Fish, which are at the top of the food chain and are an important food source for humans, can accumulate heavy metals in their tissues 10 , and this characteristic makes them an effective indicator of pollution 11. Accordingly, assessment of pollution from heavy metals in sediments in the environment is very important in terms of its effects on aquatic organisms and human health 12. Lake sediments are a sink for heavy metals 13,14 , and heavy metal concentrations are generally higher in sediment than in water 15. Indeed, concentrations of heavy metals in water are sometimes lower than detection limits, meaning that sediment should be analysed to assess levels of contamination by heavy metals in the aquatic system 16-18. Lake sediments mostly act as a sink for heavy metals; on the other hand, they can also act as a source to the overlying water 19,20. C...

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“…have been developed, and these indices have been successfully used in numerous studies [55][56][57][58] . We used I geo , EF, CF, and PLI to assess heavy metal pollution in Lake Bafa.…”

Section: Sediment Pollution Indices Various Pollution Indices For Asmentioning

confidence: 99%

Concentrations and sources of heavy metals in shallow sediments in Lake Bafa, Turkey

Algül

Beyhan

2020

Sci Rep

130

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“…1 A higher mean value of 55.88±14.28 was also reported for periwinkle obtained from the Benin River, Nigeria. 34 Lower values ranging from 0.001–0.004 were recoded for periwinkle harvested from a tropical mangrove forest in the Niger Delta, Nigeria. 35 The significant difference in Pb concentration observed between the months of June and August could be attributed to dilution.…”

Section: Discussionmentioning

confidence: 99%

Concentration and Potential Human Health Hazards of Heavy Metals in Periwinkle (Tympanotonus fuscatus) Purchased from Major Markets in Calabar, Nigeria

Udiba

Udofia

Akpan

2020

Journal of Health and Pollution

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Background. As water flows through habitats associated with estuaries, such as mud flats, salt marshes, sea grass and mangrove forests, pollutants such as heavy metals are filtered. The fine sediment dominant in intertidal and subtidal estuarine systems is an important sink for these contaminants. Periwinkle, which inhabit estuarine ecosystems, are known to bioaccumulate large quantities of contaminants. Objectives. In view of the widespread consumption of periwinkle in the Niger Delta, Nigeria, this study was designed to assess the concentration and potential human health hazards of heavy metals due to the consumption of this rich, inexpensive and readily available source of protein in Calabar, Nigeria. Methods. Lead (Pb), cadmium (Cd), chromium (Cr) and nickel (Ni) content of edible tissues of periwinkles obtained from major markets in Calabar were determined using Shimadzu atomic absorption spectrophotometer (Model AA-6800, Japan) after wet digestion. Results. The ranges of concentration (mg/kg dry weight) were Pb (0.011–0.056), Cd (0.008–0.032), Cr (0.014–0.157) and Ni (0.053–0.261) for Watt Market and Pb (0.009–0.052), Cd (0.011–0.032), Cr (0.012–0.052) and Ni (0.012–0.322) for Mariam Market. Concentrations of all the metals were below Food and Agricultural Organization (FAO), FAO/World Health Organization (WHO) and Commission of European Communities maximum permissible limits. The estimated daily intake (EDI) of Pb and Cd were slightly higher compared to the recommended daily intake for the metals. The EDI of all metals under study were lower than the upper tolerable daily intake. The target hazard quotients (THQ) computed to estimate the human health risk posed by each metal were above the safe limits of unity, except for Cr. The hazard index (HI) for a typical adult of 60.7 kg body weight was found to be 9.7 for Watt Market and the relative contributions to the aggregated risk were 24.66%, 54.51%, 0.0001% and 20.70% for Pb, Cd, Cr and Ni, respectively. The HI for Marian Market was 10.7 and the relative contributions to the aggregated risk were 22.31%, 57.55%, 0.06% and 20.09% for Pb, Cd, Cr and Ni, respectively. Conclusions. Consumption of periwinkles purchased from major markets in Calabar poses toxicological risk with respect to Pb, Cd and Ni poisoning. Competing interests. The authors declare no competing financial interests.

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“…Several studies have shown that heavy metals can accumulate in fish tissues: Fe, Mn, and Ni were found to accumulate in shellfish ( Tympanostomus fuscatus ), while Fe, Zn, Cr, Co, and Ni were detected in the tissues of Tilapia or Oreochromis mossambicus. 54 , 55 The bioaccumulation of metals differs among aquatic species. Chromium accumulates more in freshwater prawn, followed by frogs, freshwater crabs and snails, and least in fish.…”

Section: Discussionmentioning

confidence: 99%

Metal Concentrations in Sediments of the Alinsaog River, Santa Cruz, Zambales, Central Luzon, Philippines

Sazon

Migo

2020

Journal of Health and Pollution

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Background. Efforts are needed to evaluate heavy metal concentrations in aquatic sediments which serve as repositories and as sources of contamination of other habitats. Objectives. The present study assessed temporal changes in the pH, particle size and concentration of metals in sediments of a mining-affected river in Zambales, Philippines. Methods. Sediment samples were collected at different periods in four stations along the river using a modified Van Veen grab. The samples were subjected to quartering, air-drying, and sieved through a mesh of 40 mm prior to X-ray fluorescence spectroscopy analysis using Thermo Scientific Niton XL3t to determine metal concentrations. The sediment particle size was analyzed by the sieve method and soil pH by the electrode method. Results. Measured metal concentrations in the sediment were as follows: iron (Fe)> calcium (Ca)> chromium (Cr)> nickel (Ni)> manganese (Mn) with averages of 174.6 mg/g, 7.89 mg/g, 6.54 mg/g, 4.82 mg/g, and 2.75 mg/g dry matter (DM), respectively. The mean pH of riverine sediments was generally neutral, except for Station 4. In terms of particle size, silt and clay fractions increased in the upstream station but decreased in the midstream and downstream stations across the sampling periods. The flooding brought by Typhoon Koppu resulted in lowered concentrations of Fe, Mn, Cr, and Ni and an upsurge in Ca and potassium levels. Discussion. Most of the heavy metals (Fe, Ni, Cr, Mn) exceeded the probable effect level (PEL) for inorganics in sediments, suggesting that the adverse effects of these metals on the environment and aquatic organisms are expected to occur frequently. In comparison with Station 4, which was less affected by siltation, there was a sign of metal enrichment in the area. This indicates that soil erosion and runoff, which might have been triggered by vegetation loss, mineral extraction, and agricultural activities, had a significant impact on the quality of river sediments. Conclusions. The findings of the study point to the need for the formulation and implementation of appropriate regulatory measures for the protection and rehabilitation of the heavy metal-loaded river. Competing Interests. The authors declare no competing financial interests.

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Evaluating the potential health risks of heavy metal pollution in sediment and selected benthic fauna of Benin River, Southern Nigeria

Cited by 69 publications

References 38 publications

Concentrations and sources of heavy metals in shallow sediments in Lake Bafa, Turkey

Concentrations and sources of heavy metals in shallow sediments in Lake Bafa, Turkey

Concentration and Potential Human Health Hazards of Heavy Metals in Periwinkle (Tympanotonus fuscatus) Purchased from Major Markets in Calabar, Nigeria

Metal Concentrations in Sediments of the Alinsaog River, Santa Cruz, Zambales, Central Luzon, Philippines

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