Abstract

Boubo river and lagoon, south Côte d’Ivoire, are contaminated by manganese released in wastewater from manganese exploitation and from the soil of Grand-Lahou region in Côte d’Ivoire. So, there is a need to develop a simple method for the evaluation of manganese present in natural water. This work reports the utility of rapid and inexpensive method for determination of dissolved manganese (II) in natural water by cathodic stripping voltammetry using rotating carbon paste disk electrode. The experimental parameters for the determination of manganese (II) were optimized. Under the optimum conditions, the method was successfully applied to determination of free manganese in river and lagoon samples taken near the manganese exploitation in the area of Grand-Lahou, Côte d’Ivoire.

Key words: Manganese, cathodic stripping voltammetry, carbon paste electrode, rotating disk electrode, river water, lagoon water.