June 2013 Vol. 1 No. 4

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Full Length Research Paper

Risks of contamination of drillings water with toxic metals accumulated in sediments of Nokoué Lake in Benin
 

^1,3,4Kinsiclounon Gilles E., ^2,3Edorh Patrick A., ^*3Guedenon Patient, ⁴Senou Masimin, ³Deguenon Yvette, ⁴Akpovi Casimir, ⁴Loko Frederic, ³Boko Michel, ⁵Gbeassor Messanvi, ⁶Creppy Edmond E.

¹Health and Medical Research Institute, P. O. Box: 974, Abomey-Calavi
²Biochemistry and Cellular Biology, University of Abomey-Calavi (UAC), 01BP 526,
³Interfaculty Centre of Training and Research in Environment for Sustainable Development (CIFRED), University of Abomey-Calavi (UAC), 03 BP 1463, Jéricho,
⁴Laboratory of Applied Research in Biology (LARBA), Genie Environment Department of Polytechnic, University (EPAC), University of  Abomey-Calavi (UAC) 01BP 526 Cotonou, Benin Republic
⁵Department of Physiology and Pharmacology, Faculty of Sciences, University of Lomé (UL), Togo P. O. Box: 1515 Lomé, Togo
⁶Laboratory of Toxicology and Applied Hygiene/UFR of Pharmaceutical Sciences, 146, Road LeoSaignat, 33076 Bordeaux Cedex, France

*Corresponding Author E-mail: purussotama@yahoo.fr; Phone no: +22995844948

Accepted June 06, 2013

Abstract

The present study aimed at understanding the connection between surface water, groundwater and heavy metal contamination. To achieve our goal, thirty samples of water collected from different water stations were analyzed for heavy metals at the toxicological laboratory of the national agricultural institute of Benin (INRAB). The results revealed a contamination of water samples with copper, zinc and nickel with concentrations lower than the safety limits by WHO which are respectively 3 mg/L, 5 mg/L and 0.05 mg/L. However, lead mean concentrations in stored and drilling water were above permissive value (0.04). In respect of cadmium, higher values were recorded in some drillings and surface waters. This may be due to the infiltration of heavy metals usually concentrated largely in sediments into drilling and groundwater. To face the challenge of public health problem posed by the contamination with heavy metals, it is important to implement new agricultural and sanitation policies

Keywords: Nokoué Lake, heavy metals, water, contamination