Diagnosis of Wastewater Contamination by Metalic Trace Elements (MTE) in the Areas of Yopougon (South Abidjan) and Marcory, Koumassi (North Abidjan) from March to July 2021

Contamination of the aquatic environment by Metallic Trace Elements (MTE) is a major problem encountered in our environment today. In Côte d’Ivoire, in some municipals, residential and industrial areas in the city of Abidjan, waste water of worrying quantity is discharged into the rainwater drainage channels which flow directly into the Ebrié lagoon. In order to identify the origin of the pollution by metallic trace elements (MTE) transported by this water, samples of wastewater were collected and then analyzed. ICP-MS was used for MTE (Cu, Fe, Zn, Al, Pb, Cd) analyses and results were statistically processed in multivariate form using PCA and Excel. The results showed high concentrations of metals, with the exception of Cd. The typological structure represents 85.74% of the total information for the MTE. Plan F1 represents 63.90% of the variance and describes water pollution by copper (0.95), zinc (0.90), iron (0.84) and aluminum (0.84). Plan F2 represents 21.84% and describes the enrichment of water with lead (0.84). It seems more than necessary to make manufacturers aware of the need to install wastewater treatment systems in order to avoid their discharge into the environment.