Abstract:
This research was done to understand the adsorption capability of activated carbon hydroxyapatite beads which is used for the elimination or removal Nickel (Ni). For this reason activated carbon / HAP beads was prepared using activated carbon with sodium alginate and hydroxyapatite. The adsorbent was characterized at 5 different ratios to study the effect of concentration of different ingredients. Activated carbon, sodium alginate and HAP were mixed in distilled water and then added drop wise in CaCl2 solution to produce activated carbon / HAP beads. The characterization of activated carbon was study under many techniques e.g. X-Ray powder diffraction, scanning electron microscopy, Fourier Transform Infrared Spectroscopy, surface morphology, percentage increase in activated carbon, occurrence of different functional groups and thermal stability. Different experimental parameters initial concentration, adsorption capacity, Ph and adsorbent dose were study for the elimination / removal of heavy metals. The process of adsorption was maximum for nickel with equilibrium at 60 minutes. The pH at which we achieve the maximum adsorption was 6. For 100 ppm solution the maximum metal loading was achieved 4g/l. Langmuir isotherm model was best fitted with experimental data base, and kinetic experimental data was fitted with Pseudo-second order for kinetic analysis and the results have shown the R2 value more than 0.9990. From overall study it is very much clear that the amount of activated carbon is directly proportional to the adsorption capability. For Nickel the maximum adsorption capacity was study 71.18mg/g. Reuse and recyclability of activated carbon / HAP beads showed 90 % elimination efficacy up to four cycles.
