Analysis of Leachate Contamination Potential of a Municipal Landfill Using Leachate Pollution Index

Groundwater contamination due to municipal landfill sites is a threat to ground water integrity. This current research characterised the heavy metals in leachate from Soluos dumpsite in Lagos, Nigeria and assessed the groundwater quality at different distances from the dumpsite for both dry and wet seasons. The contaminants examined are lead, zinc, copper, nickel, chromium, iron, manganese, magnesium, calcium, sodium, potassium and chloride. The results showed that the concentration level of contaminants examined in groundwater samples in all the well investigated fall within the maximum acceptable concentration stipulated by World Health Organisation and National Agency for Food and Drug Administration and Control except for GW2 for wet season; but it will be higher than the level stipulated by the regulatory bodies in future based on the predicted values, hence there is a need to upgrade the dumpsite to prevent future contamination of groundwater. A predictive model for transport of contaminants through a porous medium used in this work predicted the contaminants concentration in groundwater samples near the dumpsite to a very appreciable level of above 93% confidence level, using finite difference method implemented in Matlab 7.0. This showed that the model parameters used which were obtained by sensitivity analysis of previous work of Jhamnani and Singh are suitable for Soluos dumpsite in Lagos State. Descriptive statistics such as mean, variation, standard deviation, standard error and coefficient of variance were used to describe the basic features of the results of groundwater samples.

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Assessment of leachate contamination potential of landfills in Ibadan, Nigeria

Adesogan¹,

Omonigho²

2021

Afr. J. Environ. Sci. Technol.

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Environmental pollution leads to poor health and has been a worrisome experience to humanity for the past few decades. This research was conducted to determine the pollution potential of landfill leachates (LFL) in Sub-Saharan Africa, using Ibadan as case study. Survey of landfills in the metropolis was undertaken; the two major active unlined landfills (Ajakanga and Awotan), were considered for this study. During sampling, eighteen parameters of interest were analyzed. The leachate pollution indices (LPI) of each landfill were calculated. The LPI of Awotan landfill is 17.55 while that of Ajakanga is 15.67. With the exceedances of the 7.378 standard LPI value, all landfills in the metropolis is recommended to be closed down in line with international best practices and new sanitary landfills set up in their stead. Based on the sub-LPI values obtained, biological treatment would be the most viable treatment option for the LFL produced. The findings from this study are applicable in landfill management in other countries within the African sub-region; thereby contributing to the attainment of Sustainable Development Goals (SDGs).

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Analysis of Leachate Contamination Potential of a Municipal Landfill Using Leachate Pollution Index

Cited by 6 publications

References 6 publications

Leachate characterisation and evaluation of leachate pollution potential of urban municipal landfill sites

Leachate characterisation and evaluation of leachate pollution potential of urban municipal landfill sites

Leachate Characterisation and Assessment of Groundwater Quality: A Case of Soluos Dumpsite in Lagos State, Nigeria

Assessment of leachate contamination potential of landfills in Ibadan, Nigeria

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