| Summary: | This study investigates the removal of ammonia, iron and zinc using zeolite and
limestone as adsorbents. Literature review indicated that zeolite and limestone are
capable of removing heavy metal cations through batch process. Therefore, batch
experiments were carried out in this research to determine the efficiency removal of
ammonia, iron and zinc in leachate taken from Pulau Burung Landfill Site. Shaking
and settling times, shaking speed, the optimum mixture of zeolite and limestone were
pre-determinated, respectively. Result show that the shaking and settling times were
1 hour, respectively. The optimum shaking speed was 350 rpm and the optimum
mixture between zeolite and limestone was 15 mL of zeolite and 25 mL of limestone.
Mixing the limestone with zeolite could reduce the cost of treatment. Adsorption
isotherm at the optimum mixture was determined using Freundlich and Langmuir
principle. The value of 1/n and Kf for iron was 0.5845 and 0.00062, respectively and
was 1.4131 and 0.1683, respectively for zinc. The breakthrough time for iron and
zinc was 4.28 and 4344.33 days, respectively at flow rate 460m3/day and 4.5 m3
column volume. Adsorption kinetics determination showed that it followed the
pseudo second order chemical adsorption of R2 values for ammonia, iron and zinc was
0.9726, 0.9991 and 0.9958, respectively.
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