ADSORPTION OF VANADIUM IONS

This study was aimed to examine suitability of Dangara middle layer clay as an adsorbent for the removal of vanadium ions. variable parameter such as adsorbent dosage, initial concentration, contact time, pH and temperature were at moderate level such that they can affect the removal of vanadium ions. For pH, it was observed that the % removal was increases with an increasing in pH. The optimum % removal was obtained from 79.39 at pH 9, and the lower % removal was obtained at 70.50 from pH 3. For adsorbent dosage it was discover % removal increases with an increasing in adsorbent dosage, the optimum % removal was obtained 82.15 at 1g and the lower % removal was obtained from 69.28 at 0.2g. for initial concentration there an increases in percentage removal with an increasing in initial concentration the optimum percentage removal was obtained at 86.91 at 50g and lower percentage removal was obtained from 81.56 at 10g. for contact time it was discover there is increases in percentage removal with an increasing in contact time, the optimum percentage removal was obtained from 80.52 at 50mins And the lower percentage removal was obtained at 76.07 at 10mins also there is an increases in percentage removal with an increasing in temperature, optimum percentage removal was obtained at 80ᴼC (81.07) and lower percentage at 40ᴼC (78.67). The efficiency determination (r2) fitted for both langmuir and freundlich. For Langmuir isotherm it was discover that the efficiency determination (r2) obtained was 0.999 and efficiency determination for freundlich was 0.995 Maximum adsorption capacity calculated for Langmuir was 0.345mg/g why the freundlich constant obtained was o.457. The Langmuir model was found to better described the adsorption behavior. Overall, the clay is not considered competent enough as an adsorbent for the removal of vanadium ions from aqueous solution because of low adsorption capacity calculated to be 0.345mg/g. Modification of the surface of the clay could improve its adsorption capacity.