海洋学および海洋研究ジャーナル
オープンアクセス

概要

Assessment of the Effect of Leachates on Ground Water Supplies in Selected Locations in Osogbo, Osun State, Nigeria

Akanbi Gada Mariam A*, Olawepo Gabriel K, Iyeh Veronica A, Ogundele Susan B

Ground water pollution as a result of anthropogenic activities of man in the environment is increasing on a daily basis and this comes with some negative environmental and health impacts on man. Due to the impacts of leachate on groundwater and other water supplies, its importance has gained much attention in recent times. Well water sample were collected from wells in four sites selected from Osogbo, Osun State Nigeria. Ten samples each were collected from the four sites. The sites were Oke Baale area of the city (control), Oke-fia area of the state capital, where three sites were identified based on proximity to landfills. Analyses of physiochemical parameters and Heavy metals were done on the collections. Data were subjected to Analysis of Variance (ANOVA) to separate the means and in case (s) of significant difference in means, data were further subjected to Duncan multiple range test at p ≤ 0.05. Temperature range was between 27.30°C-27.5°C. Site 1 was the turbid (7.49) while site 2 was the least turbid (1.38). There is no significant difference in the pH of the control and site 3. Total Dissolved Solid (TDS) was highest in site 2 (270.70). Oxidation Reduction Potential (ORP) ranges from 130.40 mg/l to 174.20 mg/l while Electrical Conductivity ranged from 315 S/m to 401.00 S/m. Nitrite and Nitrate were highest site 1 (55.90) and control (0.78). Lead and Cadmium were not detected. Sodium was highest (819.00 mg/l) in site 1 and Calcium was also highest (102.00) in site 1. The study revealed that the concentration of waste materials in the land fill site had systematically polluted the ground water over time. This pollution was not high and the values recorded for all the examined physicochemical parameters examined were still within the permissible levels of WHO and USEPA.