Characterization of Dissolved Organic Matter in the Waters of Lomé Lagoon System (Togo)

Ayah M.^1, , Grybos M.², Bawa L. M.¹, Bril H.² and Djaneye-Boudjou G.¹

¹Laboratoire de Chimie des Eaux, Faculté Des Sciences, Université de Lomé, Lomé, Togo

²Groupement de Recherche Eau Sol Environnement, Faculté des Sciences et Techniques, Université de Limoges, Limoges Cedex, France

Cite this paper:
Ayah M., Grybos M., Bawa L. M., Bril H. and Djaneye-Boudjou G.. Characterization of Dissolved Organic Matter in the Waters of Lomé Lagoon System (Togo). American Journal of Environmental Protection. 2015; 3(4):145-150. doi: 10.12691/env-3-4-5

Abstract

The aims of study is to distinguish the different origins of dissolved organic matter and emphasizes the spatial variations of dissolved organic matter quality in Lomé lagoon system composed by three lakes and Equilibrium canal. The results showed that, the three lakes of Lomé are dominated by biological dissolved organic matter (HIX < 4) except the site O₁₁ (HIX = 5.75) with high biological activity (BIX included between 0.8 and 1). This high biological activity could due to the water contribution from north plateau and offshore bar. Apart from O₁₁ and C₄ the information brought by the ratio Iγ/Iα shows that the dissolved organic matter of the lagoon is autochthonous and composed by labile organic compounds. Lomé lagoon system is composed in majority by humic substances with a small amount of microbial products.

Keywords:
dissolved organic carbon aromaticity 3D fluorescence fluorescence indexes

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