Author(s)

Fidele Suanon, Biaou Dimon, Daouda Mama, A.Lyde Tominti

Laboratoire de Chimie-Physique (LCP), Département de Chimie, Faculté des Sciences et Techniques, Cotonou, Bénin;Centre Béninois de Recherches Scientifiques et Technologiques (CBRST), Cotonou, Bénin.
Laboratoire de Chimie-Physique (LCP), Département de Chimie, Faculté des Sciences et Techniques, Cotonou, Bénin;Laboratoire cd chimie Inorganique et de l’Environnement (LACIE), Cotonou, Bénin.
Laboratoire de Chimie-Physique (LCP), Département de Chimie, Faculté des Sciences et Techniques, Cotonou, Bénin;Laboratoire d’Hydrologie Appliquée (LHA), Département de Chimie, Faculté des Sciences et Techniques, Cotonou, Bénin.

Iron and Manganese contents and parameters including pH, conductivity, and organic matter contents were determined in the sediments of the Okpara dam in Northern Benin. Fifteen samples were collected during a one-month period and analysed in laboratory using the method of sequential extraction of Tessier. The analyses indicated that sediments contained high concentrations in reducible fraction of Iron and relatively high contents of exchangeable fraction, acidhydrolysable fraction and residual fraction of Manganese. The findings of this study confirmed the hypotheses that the meal contents of the sediments were relatively high and varied according to the geochemical phases.

Sediments; Iron, Manganese; Geochemical Phases; Pollution

Suanon, F. , Dimon, B. , Mama, D. and Tominti, A. (2013) Study of the Sediments of the Dam of Okpara (Benin): Physico-Chemical Characterization and Speciation of Iron and Manganese. Journal of Water Resource and Protection, 5, 709-714. doi: 10.4236/jwarp.2013.57071.