Landfilling has become the most effective
solid waste disposal option in developing countries. Aged Refuse (AR) in this
context is solid wastes
from landfill which has become stabilized after several years of placement.
The aged refuse sampled from Air Hitam
landfill site in Malaysia is characterized as follows: moisture content 29.5%,
Loss on Ignition (LOI) 9.90%, porosity 51%, ash content 95.99%, bulk density
1.23 g/cm3, hydraulic conductivity 0.31 cm/min, electrical conductivity 143.10
ms/cm and Carbon-Nitrogen-Sulphur (CNS) of 0.64%, 0.04% and 0.009%,
respectively.
Cation Exchange Capacity (CEC) is 2.69 meq/100
gm, with exchangeable cations of Calcuim, Magnesium, Potassium and Sodium. The
SEM/EDX showed available specific surface area of 3.376 m2/g and negligible
heavy metals presence with abundance of Silicon and Oxygen as compounds.
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