Concentration of toxic metals and potential risk assessment in edible fishes from Congo River in urbanized area of Kinshasa, DR Congo

Mata, Henry K.; Sivalingam, Periyasamy; Konde, Joel N.; Otamonga, Jean‐Paul; Niane, Birane; Mulaji, Crispin K.; Kiyombo, Guillaume Mbela; Poté, John

doi:10.1080/10807039.2019.1598253

Cited by 5 publications

(5 citation statements)

References 47 publications

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“…The concentrations of Zn in all tissue of eel samples in both lakes were measured the highest, except the liver. Many previous studies have found similar results of Zn concentration in different fish species in many different geographies (Topçuoğlu et al 2002;Sekhar et al 2004;Sivaperumal et al 2007;Kojadinovic et al 2007;Mata et al 2020). Zn may enter the studied lakes through agriculture or various industries however the rather low Zn concentrations observed in the livers of collected eels indicate low presence of Zn in both water bodies.…”

Section: Resultssupporting

confidence: 64%

“…In eels, the accumulation of Pb in tissues can be increased both by its association with detoxified subcellular fractions such as granules and heat-resistant proteins and by the presence of metalsensitive fraction-containing contaminants (such as organometallic compounds) in the aquatic environment. The differences of the bioaccumulation of toxic metals in fish muscle tissues is due to several factors such as feeding habits, environmental conditions, habitats, exposure time and trophic levels, as well as fish body length, weight, age, phenotypic differences, gender, physiological conditions, developmental stage, metabolism (Jia et al 2017;Carrasco et al 2011;Mata et al 2020). In this study, the difference in Pb concentration determined in the muscles of eels in both lakes is thought to be caused by environmental conditions and feeding habits.…”

Section: Resultsmentioning

confidence: 78%

“…In many previous studies in different countries, very different values of Pb levels in many fish species were determined. Most of these values exceed the permissible limits set by the European Commissions and FAO (Sonkar et al 2006;Sen et al 2011;Mata et al 2020;Akter et al 2020).…”

Section: Metal Concentrations In Musclementioning

confidence: 92%

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Bioaccumulation of Metals in Eels Taken From Lakes Köyceğiz (Turkey) and Võrtsjärv (Estonia) and Health Risk Assessments

Demirak

Keskin

Silm

et al. 2021

Preprint

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Monitoring heavy metal contaminants in fish is important for the assessment of environmental quality as well as food safety. In this study, European eel samples were collected from Lake Köyceğiz and Lake Võrtsjärv in 2017 and 2018. The concentrations of Mn, Cd, Zn, Pb, and Cu metals were measured by using GF-AAS in four selected tissues of eel, including liver, gill, skin, and muscle in both lakes. The pollution indexes (Pi, MPI) values were calculated for both lakes and the health risk for consumers was assessed for both adults and children in Turkey and Estonia. The estimated weekly intake (EWI), hazard index (HI), and lifetime cancer risk values (CRs) for the metals were calculated for both lakes. According to the results of this study, a significant difference was determined the between the metal concentrations (especially Cu, Cd and Pb) in the tissues of the eel samples taken from the two lakes. These results show that besides the pollution levels in the aquatic environment, physiological needs, and metabolic activities in different habitats have a significant effect on metal accumulation in eels. In addition, HI was found to be < 1 for both adult and child consumers in both lakes, which indicates that consumers would not experience non-carcinogenic health effects. However, the values of CR for Pb and Cd were found negligible in Lake Köyceğiz, while the CR value for Pb was found to be very close to the danger limits in Lake Võrtsjärv.

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Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 78%

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Bioaccumulation of Metals in Eels Taken From Lakes Köyceğiz (Turkey) and Võrtsjärv (Estonia) and Health Risk Assessments

Demirak

Keskin

Silm

et al. 2021

Preprint

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“…L'évaluation des risques sanitaires potentiels liés à la consommation d'amarante contaminée par les métaux toxiques a été effectuée en comparant les teneurs des métaux obtenues dans les feuilles d'amarante avec les valeurs limites recomman-dées par l'Organisation des Nations Unies pour l'Alimentation et l'Agriculture (FAO) et l'Organisation Mondiale de la Santé (OMS) pour la consommation humaine des légumes, et en calculant le Quotient de Risque Ciblé (QRC). Les formules de calculs de QRC ont été développée dans des études antérieures (Suami et al 2018 ;Mata et al 2019 ;Ngweme et al, 2020 ;2021b).…”

Section: éValuation Des Risques Sanitaires Liés à La Consommation D'a...unclassified

Consommation de légumes et risques sanitaires à Kinshasa : une évaluation appliquée aux amarantes

Mukeba¹,

Ngweme²,

Poté³

2021

crsh

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Market gardening is very important for the food security and the socio-economic life of the population of the city of Kinshasa. They provide more than 70% of the fresh vegetables consumed in the city. However, the production practices of these vegetables can lead to their contamination by micropollutants such as toxic metals with potential health risks for consumers to be assessed. This research examines the accumulation of toxic metals in amaranth (Amaranthus viridis) leaves sold in four markets in the city of Kinshasa in order to assess the potential risks to consumers. The results show that concentrations of toxic metals in amaranth leaves during the dry and rainy seasons are very high. The contamination of vegetables can be explained by several factors, including chemicals used to prevent amaranth diseases, emissions from vehicles and motorcycles in fields located near major roads, and watering. Given the concentrations of toxic metals in pigweed leaves compared to the FAO/WHO limits, and the results of our risk calculations, excessive consumption of this vegetable may pose potential health risks to consumers.

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“…The concentration, distribution, and toxicity of heavy metals in soil, sediment and edible fish samples of surface waters (for example, rivers and West Atlantic Ocean Coast) of Kinshasa and Central Kongo province of the Democratic Republic of the Congo have been recently assessed (Ngweme et al, 2020;Mata et al, 2019Mata et al, , 2020Suami et al, 2018). However, there is a lack of information on the concentration, distribution, and ecological toxicity of heavy metals in agroecosystems at the Kinshasa region.…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Levels and Potential Ecological Risks Assessed at an Agroecosystem Site in Tropical Region

Lundemi¹,

Neema²,

Atibu³

et al. 2022

GEP

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The concentrations and distribution of thirteen metals and metalloids were investigated in soils, sediments, and two biological matrices (the fish Clarias gariepisnis and the earthworm Pontoscolex corethrurus) from the CECOMAF agroecosystem, in Kinshasa, Democratic Republic of the Congo, in order to assess the impact of anthropogenic activities. The results revealed high concentrations of heavy metals, such as Cu, Zn, As, Cd, Pb, and Hg all above values recommended by sediment quality guidelines and their probable effect levels on biota. According to the calculated Enrichment Factor, soil and sediments ranked from moderately to heavily polluted by Cu, Zn, Cd, Pb and Hg. The Contamination Degree and other ecological risk indices indicated very high contamination and very high ecological risks posed by Cd and Hg, respectively. The Geoaccumulation Index indicated that current metal concentrations in the agroecosystem originated from anthropogenic activities, while the Spearman correlation matrix values indicated that Hg could originate from different sources and pathways than the other metals. It was concluded that metals from unchecked anthropogenic activities have negatively impacted agricultural activities and fish production at the CECOMAF agroecosystem. Action to reduce the contamination level and the ecological risks by remediating and preventing metal pollution in the CECOMAF agroecosystem site is recommended.

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Concentration of toxic metals and potential risk assessment in edible fishes from Congo River in urbanized area of Kinshasa, DR Congo

Cited by 5 publications

References 47 publications

Bioaccumulation of Metals in Eels Taken From Lakes Köyceğiz (Turkey) and Võrtsjärv (Estonia) and Health Risk Assessments

Bioaccumulation of Metals in Eels Taken From Lakes Köyceğiz (Turkey) and Võrtsjärv (Estonia) and Health Risk Assessments

Consommation de légumes et risques sanitaires à Kinshasa : une évaluation appliquée aux amarantes

Heavy Metal Levels and Potential Ecological Risks Assessed at an Agroecosystem Site in Tropical Region

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