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Carbonized green mussel shell as heavy metal removal
Nur Afifah A. Rahman1, Mohd Ismid Mohd Said2, Shamila Azman3.
Large amount of mollusc shell are usually disposed off and can a create nuisance due
to odor and its quantity. Therefore this study aims explored the adsorption capacity of green
mussel (Perna viridis) shell for cadmium, chromium and lead from aqueous solutions.. The
adsorbent has prepared from powdered green mussel shell in the form of carbonized adsorbents
shells at 600°C. The carbonization process was conducted for four hours and allowed to cool at
room. Characterization of pH, bulk density, moisture content and ash content was also
conducted. The effect of various operational parameters such as concentration, pH, temperature
and sorption time on the adsorption of heavy metals were investigated using batch process
experiments It was found that green mussel shell can be used as a low cost adsorbent for the
removal of heavy metals in aqueous solution. The maximum ion adsorption capacities followed
the trend lead > chromium > cadmium and the percentage adsorption was found to depend on the
concentration of the adsorbent present, the solution pH, temperature and the sorption. This shows
that the adsorption of metal ions on the adsorbent is chemisorption. Kinetic treatment of the
results gave a pseudo-second order type of mechanism while the adsorption characteristics of the
adsorbent followed the Freundlich adsorption isotherm. The results obtained proved that green
mussel shells can be alternative resources of adsorbent materials.
Affiliation:
- Universiti Teknologi Malaysia, Malaysia
- Universiti Teknologi Malaysia, Malaysia
- Universiti Teknologi Malaysia, Malaysia
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