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Assessment of the Temporal and Spatial Variation of the Mercury Content of Lake Nokoué in Southern Benin Republic (West Africa)

Anthropogenic input of mercury into watersheds is becoming increasingly noticeable and is the cause of fishery products contamination. This had led to the Convention of Minamata signed and ratified by the vast majority of the countries in the world. Lake Nokoué in Benin Republic, the most fishery pr...

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Autores principales: Adounkpe, Julien G., Azon, N. B. Nadia, Dégila, Hermione W., Hounkpe, Peace, Amoussou, Robertson
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510800/
https://www.ncbi.nlm.nih.gov/pubmed/34650345
http://dx.doi.org/10.1155/2021/5412785
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author Adounkpe, Julien G.
Azon, N. B. Nadia
Dégila, Hermione W.
Hounkpe, Peace
Amoussou, Robertson
author_facet Adounkpe, Julien G.
Azon, N. B. Nadia
Dégila, Hermione W.
Hounkpe, Peace
Amoussou, Robertson
author_sort Adounkpe, Julien G.
collection PubMed
description Anthropogenic input of mercury into watersheds is becoming increasingly noticeable and is the cause of fishery products contamination. This had led to the Convention of Minamata signed and ratified by the vast majority of the countries in the world. Lake Nokoué in Benin Republic, the most fishery products provider in West Africa, is subject to mercury pollution. The health threat to both the benthic and the consumers of the fishery products from this lake has to be anticipated by precisely determining the dynamics of mercury contamination of the waters and sediments of Lake Nokoué, taking into account the anthropogenic contribution. Water and sediment samples were collected on 23 sites twice a month for four sampling campaigns. Parameters such as pH, salinity, COD, and SS are evaluated in the water. The assessment of total mercury is conducted by cold vapor atomic absorption according to the US EPA 7473 method, using a direct mercury analyzer (DMA-80). On average, the mercury content in Lake Nokoué water is 0.43 ± 0.57 μg/kg. Its variation is linked not only to the seasonal variation but also to that of the suspended matter. South of the lake, the sediments are extremely polluted (5 ≤ Igeo) and present a risk of frequent effects for the benthic species present.
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spelling pubmed-85108002021-10-13 Assessment of the Temporal and Spatial Variation of the Mercury Content of Lake Nokoué in Southern Benin Republic (West Africa) Adounkpe, Julien G. Azon, N. B. Nadia Dégila, Hermione W. Hounkpe, Peace Amoussou, Robertson ScientificWorldJournal Research Article Anthropogenic input of mercury into watersheds is becoming increasingly noticeable and is the cause of fishery products contamination. This had led to the Convention of Minamata signed and ratified by the vast majority of the countries in the world. Lake Nokoué in Benin Republic, the most fishery products provider in West Africa, is subject to mercury pollution. The health threat to both the benthic and the consumers of the fishery products from this lake has to be anticipated by precisely determining the dynamics of mercury contamination of the waters and sediments of Lake Nokoué, taking into account the anthropogenic contribution. Water and sediment samples were collected on 23 sites twice a month for four sampling campaigns. Parameters such as pH, salinity, COD, and SS are evaluated in the water. The assessment of total mercury is conducted by cold vapor atomic absorption according to the US EPA 7473 method, using a direct mercury analyzer (DMA-80). On average, the mercury content in Lake Nokoué water is 0.43 ± 0.57 μg/kg. Its variation is linked not only to the seasonal variation but also to that of the suspended matter. South of the lake, the sediments are extremely polluted (5 ≤ Igeo) and present a risk of frequent effects for the benthic species present. Hindawi 2021-10-05 /pmc/articles/PMC8510800/ /pubmed/34650345 http://dx.doi.org/10.1155/2021/5412785 Text en Copyright © 2021 Julien G. Adounkpe et al. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Adounkpe, Julien G.
Azon, N. B. Nadia
Dégila, Hermione W.
Hounkpe, Peace
Amoussou, Robertson
Assessment of the Temporal and Spatial Variation of the Mercury Content of Lake Nokoué in Southern Benin Republic (West Africa)
title Assessment of the Temporal and Spatial Variation of the Mercury Content of Lake Nokoué in Southern Benin Republic (West Africa)
title_full Assessment of the Temporal and Spatial Variation of the Mercury Content of Lake Nokoué in Southern Benin Republic (West Africa)
title_fullStr Assessment of the Temporal and Spatial Variation of the Mercury Content of Lake Nokoué in Southern Benin Republic (West Africa)
title_full_unstemmed Assessment of the Temporal and Spatial Variation of the Mercury Content of Lake Nokoué in Southern Benin Republic (West Africa)
title_short Assessment of the Temporal and Spatial Variation of the Mercury Content of Lake Nokoué in Southern Benin Republic (West Africa)
title_sort assessment of the temporal and spatial variation of the mercury content of lake nokoué in southern benin republic (west africa)
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510800/
https://www.ncbi.nlm.nih.gov/pubmed/34650345
http://dx.doi.org/10.1155/2021/5412785
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