Spatial Variation in Landfills Leachate Solution in Urbanized Area of Lagos State, Nigeria
Afolayan, O.S; Ogundele. F.O; Odewumi, S.G

Abstract
Liquid that formed through decomposed and degenerated solid waste into a solution at the base of a landfill known as leachate is the general characteristics of any dumpsite .Its formation, toxicity and migration is the function of waste type and management strategy, topography, underlying geology and season. The aim of this paper is to compare the concentration of physicochemical, chemical and biological parameters in three samples of leachate from different landfills. Collected data were subjected to descriptive statistical analysis and compared with Lagos State Environmental Protection Agency(LASEPA) standard limit for waste water. Analyzed results indicate the higher concentration of Fe, Mn, K, TSS, EC in Solous 1 leachate which was closed dump site and TDS,NI and BOD in Solous 2,an operational and open dumpsite. The study concluded that leachate of different landfills vary in parameters concentration. Most of the parameters reduced in quantity, toxicity and concentration with respect to time and type of landfill either operational and open or old and closed.

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