Project Abstract

Abstract
The study aimed to investigate the leachate composition of Isale-Ijagba and Oke-Diya dumpsites in Sagamu, Nigeria, and assess the potential environmental impact on surface and groundwater quality. Leachate samples were collected from the dumpsites and analyzed for physicochemical parameters including pH, electrical conductivity, turbidity, chemical oxygen demand (COD), biochemical oxygen demand (BOD), heavy metals, and organic pollutants. The results revealed that the leachate from both dumpsites had elevated levels of pollutants, with Isale-Ijagba leachate showing higher concentrations of heavy metals such as lead, cadmium, and chromium compared to Oke-Diya leachate. The organic pollutants detected in the leachate included volatile organic compounds and polycyclic aromatic hydrocarbons. The potential environmental impact of the leachate on surface and groundwater quality was assessed by comparing the leachate characteristics with relevant water quality standards. The results indicated that the leachate had the potential to contaminate surface water bodies and groundwater sources in the vicinity of the dumpsites. The elevated levels of heavy metals and organic pollutants in the leachate could pose serious health risks to humans and aquatic organisms if not properly managed. Furthermore, the high COD and BOD values of the leachate indicated a high level of organic pollution, which could lead to oxygen depletion in water bodies and negatively impact aquatic ecosystems. Overall, the findings suggest that the Isale-Ijagba and Oke-Diya dumpsites in Sagamu are sources of pollution due to the composition of their leachate. Proper waste management practices and leachate treatment are essential to mitigate the environmental impact of these dumpsites on surface and groundwater quality. Implementing measures such as leachate collection systems, liner installations, and regular monitoring of leachate quality can help reduce the pollution load and protect the environment. Further research is needed to investigate the long-term effects of leachate contamination on the surrounding ecosystems and human health, as well as to develop sustainable management strategies for solid waste disposal in the study area.

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