pounds) and pathogens at various strengths. These pose a serious
environmental hazard to ground water and surface water if not
properly managed and treated—especially with inevitably imperfect
or damaged landfill liners during landfill construction [2].
Monitoring of heavy metal concentrations in landfill leachate has
been prescribed by authorities and is routinely performed by land-
fill operators [3]. Heavy metal toxicity is a major concern and
can also be assessed using biological assay [4,5]. Landfill leachate
composition varies due to waste composition, age (i.e. degree of
decomposition) and soil characteristics, as well as local environmental
conditions such as precipitation and ambient temperature
[6]. The stability of MSW correlates to leachate quality in terms of
heavy metals, ammonia and chemical oxygen demand (COD).