Abstract
Temanggung Landfill is equipped with a liner system that consists of gravel, geotextile, geomembrane, and compacted clay. However, there is still potential for contaminant mobilization through liners to the surrounding environment, especially the soil beneath the landfill. The purpose of this research is to simulate the movement of lead (Pb) in landfill, vertically at every depth. Contaminant migration from landfill across time can be predicted using POLLUTEv7 software, a one-dimensional model that can describe contaminant mobilization affected by dispersion, advection, diffusion, and retardation phenomena. Over a period of 15 years simulated by the model, the concentration of Pb increased continuously. The initial concentration of Pb above the liner was 0.56 mg/l. This level dropped to 0.35 mg/l after passing the liner in the first year, then increased to 0.4106 mg/l in the second year, and kept increasing up to 0.5071 mg/l in the 15th year.
Highlights
The characteristics of municipal solid waste leachate are influenced by the type of solid waste buried in landfill
Temanggung Landfill has been equipped with a leachate barrier that consists of various materials
The geotextile is laid underneath the gravel layer, and is followed by a geomembrane layer that has a very low permeability of 5x10-10 m/s
Summary
The characteristics of municipal solid waste leachate are influenced by the type of solid waste buried in landfill. Most of the solid waste in developing countries going to landfill is in the form of mixed and unsorted waste. Some hazardous waste are dumped in landfills [1]. During the decomposition process of solid waste, leachate will be produced and flow to the bottom of the landfill [2]. A landfill is equipped with a semipermeable liner that functions to prevent leachate escaping to surrounding soil [3]. A small amount of leachate still passes through the liner and migrate into the soil due to seepage or liner leakage [4]
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