Effect of pH and contact time on the adsorption of heavy metals in acid mine drainage using hydrated lime
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Date
2018-06
Authors
Arvitcha Chamnek
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Abstract
Acid mine drainage (AMD) is one of the most problematic occurrence that can
cause environmental degradation to the ecosystems, human health, and may devastate
the water security in the area. The major problem with AMD is the content of heavy metals
in it and if neglected may pose a major threat to the human health. Since today, many
research was done to treating the acid mine drainage but less is known on how the pH
and contact time of adsorbent material affects the heavy metals concentration. This study
present the results of a study conducted in Pengkalan Hulu, Perak where real acid mine
drainage water sample is taken to be treated. This study also aims to analyze the
characteristic of AMD water sample and composition of adsorbent media as well as to
observe the optimum pH and contact time for treatment of acid mine drainage sample
using hydrated lime as the adsorbent material. The study shows that longer contact time
is needed for the highest percentage of adsorption of heavy metals. However, pH varies
for each of the heavy metals to be adsorbed at maximum. This project is significant to
comply with the standard set in Mineral Development (Effluent) Regulations 2016 to
sustain the environmental quality.