Département des Sciences et Techniques de l'Eau et du Génie de l'Environnement (DSTEGE), UFR des Sciences de la Terre et des Ressources Minières, Université Félix Houphouet Boigny de Cocody, BP 582 Abidjan 22, Côte d'Ivoire
The most of groundwater in Katiola area present high relatively proportions of iron. Previous works indicate that over 67% of collected water have iron proportions above the WHO guideline value which is 0.3 mg L-1. If iron and manganese do not pose serious health risks, their presence may indicate that groundwater is of poor quality and may be indicative of an existence of other problems that could cause adverse health effects. Therefore, this study aims to determine the origin of iron in groundwater of the area study and give answers to high iron contents. To achieve this goal, we applied multivariate analysis (CNPA and CAH) on the results of physico chemical analysis and overlay maps of iron distribution with geological map. The results of the ACPN indicate that; solubility of iron and manganese increases in anoxic conditions. The overlay map of iron concentration distribution of with geological map shows that, high iron levels are found in greater proportion in the biotite’s granites; suggesting their origin related to the geology of the area study.
The led study presents the current state of the quality of waters of the tablecloth of Bonoua as well as its situation towards polluting elements of anthropological origin (NO3-, Cl-, NH4 +). This tablecloth is more and more requested to cover the water requirements of the city of Abidjan, while its quality is felt (experienced) by the diverse sources of pollution which multiplied further to the urbanization and to the development of the agro-industrial cultures. To estimate the current subterranean quality of waters of this tablecloth a comparison and a follow-up of its physico-chemical parameters from 2001 till 2015 was realized. It was coupled with a multivariated statistical analysis to know the Analysis in Main Component (ACP) to determine the origin of mineralization, The methodology took into account on one hand the hydrochemical parameters which showed that waters are acid with a pH between ((4,2UpH and 6,88UpH, more important concentrations in nitrates (140mg / L) to Ahoutou
Show abstract
Full Text
