Hydrochimie des eaux de surface de la région d'Adiaké (sud-est côtier de la Côte d'Ivoire)
Journal of Applied Biosciences
Hydrochemistry of surface waters of the region of Adiaké (south-east coastal of Côte d'Ivoire) ABSTRACT Objectives: To evaluate the physicochemical quality of surface waters of the region of Adiaké (South-east of Côte d'Ivoire) and to explain phenomena of the origin to the mineralization of these waters. Methodology and results: Seventeen physicochemical parameters were determined for each of the 7 water samples. The results were treated with hydrochemical methods using Piper diagram for the
... diagram for the classification of waters and multivariate statistical techniques. The Normalized Principal Components Analysis (NPCA) method was used to highlight the phenomenon that controls waters mineralization and the cluster analysis was to see the links between these waters. Waters were acid (5.09˂pH˂7.43) and had very low mineral content (CE˂˂100 µScm -1 ). Chemical parameters contents were all below the WHO standard for drinking water, except silica (15.8 mg/L to 56.8 mg/L) and metal trace elements like: iron (0.31 to 3.82 mg/L), manganese (0.019 to 0.264 mg/L), aluminium (0.02 to 0.232 mg/L). The waters were generally chlorinated sodi-potassium. Water mineralization is control by three phenomena: the anthropogenic activities inputs, the throughfall of soils and the contact water-rock (main mechanism of ions production). Three major clusters were obtained. Conclusion ant applications: This study reveals that 43% of surface waters of the region of Adiaké are subject to high anthropogenic pollution. Apart from the untreated bacterial contamination, this study shows that waters of Toumanguié, Ehania and Ehy lagoon can represent very important available resources of water supply.