Abstract
Carbon based materials are widely used as an absorbent to study the adsorption capacity of several metal ions (Fe, Mn, B) from industrial effluent water. In this project, three types of carbon materials were selected; (1) activated carbon (AC), (2) Carbon nanofibers supported on activated carbon (CNF-AC) and (3) commercial carbon nanofibers (CNF-C). CNF-AC is physically in the form of nanofibers which directly attached onto activated carbon surface, meanwhile CNF-C is un-attached/loose nanofibers. It was found that pH of effluent water and the type of adsorbent play important roles for adsorption of metal ions. The higher adsorption of iron ions was observed when the pH of effluent water adjusted to pH 6 with an adsorbent capacity order is CNF-AC>CNF-C>AC. Furthermore, the adsorption order for manganese ion represent as AC>CNF-AC>CNF-C. Different behavior was observed for boron ions which show higher adsorption at pH 4 with the affinities order is CNF-AC>CNF-C>AC. The results show that CNF-AC has a potential to be used as effective adsorbent for removal of metal ion from industrial effluent water for environment protection.
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