Abstract:
Fibers nut activated charcoal has been used as an adsorbent to remove cadmium (Cd2+)
and lead (Pb2+) ions in solution; The activated charcoal of fibers nut was made by
carbonization at 400oC for ± 2 hours and chemical activation using various
concentration of H2SO4 (2.5; 5.0 and 7.5%). The characterization result showed that
fibers nut activated charcoal using H2SO4 7.5% had 2,69% of moisture contain, 0.92%
of ash content, 667,59 mg/g of iodine adsorption, 4,62 mg/g of methylene blue
adsorption and 17,12 m2/g of surface area. Adsorption ability of the activated charcoal
was analyzed in variation concentration of cadmium and lead solution for 24 hours and
measured using Atomic Absorption of Spectrophotometer (AAS). The result showed the
adsorption efficiency of activated charcoal of fibers nut for cadmium (Cd2+) ion was
69,58% at initial concentration 8,58 ppm and for lead (Pb2+) ion was 97,89% at initial
concentration 22,80 ppm.
