期刊名称：International Research Journal of Environmental Sciences
电子版ISSN：2319-1414
出版年度：2019
卷号：8
期号：3
页码：62-69
语种：English
出版社：International Science Community Association
摘要：In Benin, waste oils which containing hydrocarbon, additives, and heavy metals are spilled on the soil. In Cotonou, groundwater is flush and the soil has a very high permeability. The aim of this study is to characterize water of wells and assess the extent of groundwater pollution. Samples of well water and soils were collected from three garages in three districts (10th, 11th and 13th). The reducing power (13,7 < RH <14,8) are less than 15 for all samples indicating a reducing character of groundwater. This was confirmed by low concentrations obtained in dissolved oxygen where the reduction in sulfides and sulfates create respectively the reduction in nitrates and nitrites ions. Chemical Oxygen Demand (COD) and Total Organic Carbon (TOC) revealed high organic load with migration of pollutants into groundwater. The absorbance and SUVA index revealed the presence of aromatic hydrocarbons with high aromaticity in the 13th district site. Copper and lead values showed a solubility of migrant lead to groundwater with concentration equal to 14mg/L. We note that the grounds under the garages in Cotonou city were heavily polluted.
