Sources and Distribution of Mercury Residues in Environmental and Food Matrices of the Mekrou River Watershed in Kèrou, Kouandé and Péhunco in Republic of Benin
American Journal of Applied Chemistry
Volume 6, Issue 2, April 2018, Pages: 57-63
Received: Mar. 28, 2018; Accepted: Apr. 17, 2018; Published: May 8, 2018
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Alassane Youssao Abdou Karim, Department of Chemical Engineering-Processes, Polytechnic School of Abomey-Calavi, University of Abomey, Calavi, Bénin
Mahamadou Daouda, Department of Animal Feed and Nutrition, Faculty of Agronomic Sciences, University of Abomey, Calavi, Bénin
Abdoul Kader Alassane Moussa, Department of Chemistry, Faculty of Sciences and Technologies, University of Abomey, Calavi, Benin
Daouda Mama, Department of Chemistry, Faculty of Sciences and Technologies, University of Abomey, Calavi, Benin
Issaka Youssao Abdou Karim, Department of Animal Production and Heath, Polytechnic School of Abomey-Calavi, University of Abomey, Calavi, Benin
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Environmental scientific research has been largely developed for about a century, and many disciplines have been interested in interactions and the role of hazardous chemical elements such as metallic mercury and its inorganic and organic compounds in the environment. This study aims to assess the mercury contamination level of some foodstuffs (water, milk) and of the terrestrial and aquatic environment (fodder, agricultural soil and sediments) in the municipalities of 2KP. Total mercury (T-Hg) has been determined by DMA-80 (Direct Mercury Analyzer) in different environmental and food matrices of the Mekrou river watershed in Kèrou, Kouandé and Péhunco (2KP municipalities). The mercury content is higher in the superficial horizon of agricultural soil (0-20 cm) than in the horizon (20-40 cm). Watercourses (Mekrou River and its tributaries) have relatively low levels of Hg (0.5 to 1.3 μg/L) in water compared with ponds and dams (181.2 to 616.9 μg/L). Conversely, ponds and dams are characterized by low levels of mercury in water and relatively higher levels in sediments. Concentrations of Hg in cow's milk and cattle feed varied respectively in the concentration ranges of (0.4 to 8.7 μg/L) and (7.1 to 15.7 μg/kg). Regarding plant material, the highest concentrations of mercury (15.7 μg/kg) are obtained in the okra leaves (Abelmsehus eseuilleus (L.) Moench) used in the human diet, compared to cattle fodder. This work reveals agriculture as the leading source of mercury ecosystem contamination, followed by Artisanal and Small-Scale Gold Exploitation (ASSGE) and hospital sources in 2KP municipalities.
DMA-80, Pollution with Hg, Anthropogenic Sources, Kérou, Kouandé, Péhunco
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Alassane Youssao Abdou Karim, Mahamadou Daouda, Abdoul Kader Alassane Moussa, Daouda Mama, Issaka Youssao Abdou Karim, Sources and Distribution of Mercury Residues in Environmental and Food Matrices of the Mekrou River Watershed in Kèrou, Kouandé and Péhunco in Republic of Benin, American Journal of Applied Chemistry. Vol. 6, No. 2, 2018, pp. 57-63. doi: 10.11648/j.ajac.20180602.14
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This article 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.
Dhaouadi, R.; Tarhouni, D.; Louati, A.; Bouhalfaya, R.; Elhafi, O. M., Impacts du mercure (métal trace) sur le milieu marin et les êtres vivants. 2013. Evailable:
United Nations Environment Programme (UNEP), Global Mercury Assessment 2013. Sources, Emissions, Releases and Environmental Transport. UNEP. Chemicals Branch 2013, Geneva, Switzerland, 32 p.
Pironne, N.; Cinnirella, S.; Feng, X.; Finkelman, R. B.; Friedli, H. R.; Leaner, J.; Mason, R.; Mukherjee, A. B.; Stracher, G. B.; Streets, D. G.; and Telmer, K., Global mercury emissions to the atmosphere from anthropogenic and natural sources. Atmospheric Chemistry and Physics 2010, Vol. 10, 5951-5964.
Chasar Lia, C.; Scudder Barbara, C.; Stewart Robin, A.; Bell Amanda, H.; And Aiken George, R., Mercury Cycling in Stream Ecosystems, 3, Trophic Dynamics and Methylmercury Bioaccumulation. Environ. Sci. Technol. 2009, Vol. 43, 2733–2739.
Oursel, B., Transferts et dynamique des contaminants métalliques en zone côtière. Impact d’une grande agglomération méditerranéenne. 2013, Thèse de doctorale de l’Université de Toulon.
Smith Kirk, R.; Jerrett, M.; Anderson, H. R.; Burnett Richard, T.; Stone, V.; Derwent R.; Atkinson Richard, W.; Cohen, A.; Shonkoff Seth, B. ;Krewski Daniel, C.; Pope Iii A.; Thun Michael, J.; Thurston, G., 2009. Public health benefi ts of strategies to reduce greenhouse-gas emissions: health implications of short-lived greenhouse pollutants. Vol 374 December 19/26, 2009.
Ministère de L’agriculture de L’élevage et de la Pêche (MAEP), Statistique de la campagne agricole du Benin, 2007.
Institut National de la Statistique et de l’Analyse Economique (INSAE), 2013.
Biaou, C.; Alonso, S.; Truchot, D., Contamination des cultures vivrières adjacentes et du sol lors d’une pulvérisation d’insecticides sur des champs de coton: cas du triazophos et de l’endosulfan dans le borgou (bénin). Revue Méd. Vét. 2003, Vol. 154, No 5, 339-344.
Voegborlo, R. B.; And Adimado, A. A., Total mercury distribution in different fish species representing different trophic levels from the atlantic coast of ghana. Journal of Science and Technology 2010, Vol. 30, No. 1, 1-91
Cossa and Quémerais Procedures for sampling analysis of mercury in natural waters. Rapport scientifique et technique-31E. Centre St Laurent. 1997, 36p.
Amin-Zaki, L.; Elhassani, S.; Majeed, M. A.; Clarkson, T. W.; Doherty, R. A.;Greenwood M., Intrauterine methylmercury poisoning in Iraq. Journal Pediatr1974, Vol.54, No. 5, 587-595.
AFSSA (2002), Saisine n 2002-SA-0014 relatif à l’évaluation des risques sanitaires liés à l’exposition au mercure des femmes enceintes allaitantes et des jeunes enfants.
Kanda, M.; Boundjou, G. D.; Wala, K.; Gnandi, K.; Batawila, K. ; Sanni, A.; et Akpagana, K., Application des pesticides en agriculture maraichère au Togo. Journal VertigO - revue électronique en sciences de l'environnement [En ligne] 2013, Vol. 13 No. 1 | avril 2013, mis en ligne le 16 avril 2013. URL: ; 332 DOI : 10.4000/vertigo.13456
Adechian Akinhola, S.; Baco, M. N.; Akponikpe, I., Les pratiques paysannes de gestion des pesticides sur lemaïs et le coton dans le bassin cotonnier du Bénin. Journal VertigO- revue électronique en sciences de l'environnement [En ligne] 2015, Vol. 15, No. 2, 13p.
World Health Organization (WHO), Normes de l’OMS sur l’eau potable, 2006, Mercure
Chouti, W.; Mama, D.; et Alassane A., Caractérisation physicochimique de la lagune de porto-novo (sud bénin) et mise en relief de la pollution par le mercure, le cuivre et le zinc. Journal of Applied Biosciences 2011, Vol. 43, 2882 – 2890.[18] Kadriu,, S. ; Malollari, I. ; Pula-Beqiri, L. ; Aliu, M. ; Sadiku, M.; Baruti, B. ; et Kelmendi, M., Presence of heavy metals in water and sediment of rivers trepca and sitnica. Journal of Environmental Protection and Ecology2017, Vol. 18, No. 1, 10–21.
Murat, Y.; Aykut Y.; and Fatma S., Heavy Metal Accumulation In the Leaves, Stem and Root of the Invasive Submerged Macrophyte Myriophyllum spicatum L. (Haloragaceae): An Example of Kadın Creek (Mugla, Turkey). Journal of Braz. Arch. Biol. Techno. 2014, Vol. 57, No. 3, 434-440, May-June 2014
Thompson-Roberts E., S.; Pick Frances, R.; Hall Gwendy, E. M., Total Hg in Water, Sediment, and Four Species of Aquatic Macrophytes in the St. Lawrence River, near Cornwall, Ontario. Journal of Great Lakes Research1999, Vol. 25, No. 2, 294-304. (99)70738-0. /periodique/elements/hg.htm)
Ugbidye, S.; Eneji, I. S.; and Sha’ato R., Determination of Mercury Level in Rana esculenta (Frog), Sediment and Water from River Guma, Benue State Nigeria. Journal of Environment and Earth Science2013, ISSN 2224-3216 (Paper) ISSN 2225-0948 (Online) Vol. 3, No. 12.
USEPA, Mercury in solids and solutions by thermal decomposition, amalgamation, and atomic absorption spectrophotometry, U. S. Environmental Protection Agency, 1997.
United Nations Environment Programme (UNEP), Evaluation mondiale du mercure. PNUE - Substances chimiques Genève, Suisse, 2002, 292 p.
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