Determination of elemental and nutrient composition of water, clam mantle and shell of the Volta clam (Galatea paradoxa) using neutron activation analysis

Serfor-Armah, Y.; Amoah, C; Odamtten, G.T.; Opata, N. S.; Akaho, E.H.K.

doi:10.1007/s10967-010-0664-8

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…Of course, heavy concentrations in the tissues of G. paradoxa vary considerably among studies surely due to differences in metal concentration and chemical characteristics of surface sediment from which clams were sampled and ecological need metabolism and feeding patterns of bivalves (Weng-Xion & Lu, 2017). Nonetheless Cd, Hg, Mn, Pb and Zn concentrations fell within the range of values reported for many other estuarine and freshwater environments from Ghana (Obirikorang et al 2009;Serfor-Armah et al 2010;Sarfo et al 2011) and Nigeria (Etim et al 1991;Nkwabweze et al 2012;Leizou et al 2018). In contrast to our findings, very high content of Cd (2.20±2.39 mg/kg dw) and Zn (4.01±0.69 mg/kg dwt) were reported by Asare-Donkor et al (2015) for G. paradoxa sampled at Ada in Volta estuary.…”

Section: Distribution Of Metals In Clamssupporting

confidence: 73%

Heavy Metal Contamination Levels in Clams (Galatea paradoxa, Born 1778) and Surface Sediments from Mono River Estuary, Togo, and its Health Implications

Kondo¹,

Afiademanyo²,

Ouro-Sama³

et al. 2021

JBAH

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Heavy metal pollution in aquatic ecosystems is one of the most important threats of human health and food chain. Thus, in this study, the level of Cd, Fe, Hg, Mn, Pb and Zn accumulation in surface sediments and in Galatea paradoxa, were investigated to estimate their potential health risks via consumption to residents alongside the Mono river, Togo-Benin border. Samples were collected at two fishing areas and analyzed using flame atomic absorption spectrophotometry Moreover, the likely health risks developed as a result of human contamination by heavy metal through clam consumption was also assessed using target hazard quotient (THQ) and hazard index (HI). The mean maximal metal concentrations (μg/g dw) were as follows: Fe (25624) > Mn (1176.0) > Zn (23.29) > Pb (4.67) > Hg (0.038) in silty sediments and Fe (15692) > Mn (654.78) > Zn (12.53) > Pb (2.42) > Hg (0.034) in sandy sediments. Cd content were all below the detectable limit. When compared against some consensus-based sediment quality guidelines (TEL, ERL, AFNOR), it was observed that all the concentrations, excluding Fe levels in the samples, were lower than reference values. Similarly, computed PLI was less than 1 indicating that the lower tidal parts of the Mono were unpolluted. The accumulation pattern of studied trace metals in the clams followed a slightly different trend from that found in the sediments (Fe>Zn>Mn>Hg>Pb>Cd). Fe (1353 ± 162 μg/g dw) and Zn (51,8 ± 8.9 μg/g dw) content in whole tissues of G. paradoxa were well above the maximum concentration allowable by food safety criteria. In contrast, Cd (0.097 mg/kg dw), Hg (0.24 mg/kg dw) and Pb (0.18 mg/kg dw) content were very low. Computed THQ values were all below 1, with highest results found in the small size clams regardless of the heavy metals. The HI values indicate that none of the analyzed heavy metals may pose serious risk to consumers through the clams studied. The highest risk was posed by small clams, followed in decreasing order by medium and large clams. We therefore suggest that the clams taken from main fishing locations at Mono river are safe to eat.

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Section: Distribution Of Metals In Clamssupporting

confidence: 73%

Heavy Metal Contamination Levels in Clams (Galatea paradoxa, Born 1778) and Surface Sediments from Mono River Estuary, Togo, and its Health Implications

Kondo¹,

Afiademanyo²,

Ouro-Sama³

et al. 2021

JBAH

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“…However, the levels of these minerals in this present study are higher than the results for raisins. Recent studies in Ghana have shown that the Volta clam (Galatea paradoxa) mantle contains these same elements which were found suitable for human consumption based on the WHO Safety Reference Standards (Serfor-Armah et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Determination of the Elemental Composition of the Pulp, Seed and Fruit Coat of Black Velvet Tamarind (<em>Dialium guineense</em>) using Instrumental Neutron Activation Analysis

Ofosu¹,

Opata²,

Gyampo³

et al. 2013

RJASET

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This study sought to provide data on the mineral composition of the fruit pulp, outer coat and seed of Dialiu guineense in an attempt to widen the sources of minerals for the rural population of sub-Saharan Africa. The elemental composition of the pulp, seed and fruit coat of black velvet tamarind (Dialium guineense) was determined using Neutron Activation Analysis. The fruit pulp contained manganese (23.40±1.57µg/g), chlorine (205.40±37.59 µg/g), calcium (5671.00±2132.30 µg/g), sodium (332.95±8.76 µg/g) and potassium (6190.00±711.85 µg/g). The seed and fruit coat contained all these minerals except potassium and sodium respectively. The fruit pulp can serve as a good source of macrominerals for humans while the fruit coat and seed could be ground and incorporated in various meal formulations of livestock as mineral supplements.

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Nitrate contamination of groundwater in the Lower Volta River Basin of Ghana: Sources and related human health risks

Egbi

Anornu

Ganyaglo

et al. 2020

Ecotoxicology and Environmental Safety

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Determination of elemental and nutrient composition of water, clam mantle and shell of the Volta clam (Galatea paradoxa) using neutron activation analysis

Cited by 6 publications

References 11 publications

Heavy Metal Contamination Levels in Clams (Galatea paradoxa, Born 1778) and Surface Sediments from Mono River Estuary, Togo, and its Health Implications

Heavy Metal Contamination Levels in Clams (Galatea paradoxa, Born 1778) and Surface Sediments from Mono River Estuary, Togo, and its Health Implications

Determination of the Elemental Composition of the Pulp, Seed and Fruit Coat of Black Velvet Tamarind (<em>Dialium guineense</em>) using Instrumental Neutron Activation Analysis

Nitrate contamination of groundwater in the Lower Volta River Basin of Ghana: Sources and related human health risks

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