Effects of concentration and pH on the potential of a locally sourced activated carbon from Balanites Egyptiaca stems on the adsorption of Fe2+ ions on the potential
- Author Muhammad Nasir Yaro
- DOI
- Country : Nigeria
- Subject : Chemistry
Keywords : Balanites egyptiaca; activated carbon; concentration; pH; adsorption
Abstract
Activated carbon was generated by the carbonization of balanites egyptiaca stems at 700oC for 5 hours. The carbonized stems were cooled for 24 hours, after which they were activated at 130oC using ZnCl2 solution. The activated carbon obtained was purified and dried at 100oC. For the investigation of the effect of concentration, 0.30g, 0.40g, 0.50g, 0.60g and 0.70g each of the activated carbon was used in 20.00cm3 aqueous solution of FeSo4¬.7H2O; for the investigation of the effect of pH, 0.60g of the activated carbon was added to each of the aqueous buffer solutions of FeSo4.7H2O of pH values: 5.00,6.00,7.00,8.00 and 9.00 and ; for the analysis of the adsorption isotherm of the process, the equilibrium data obtained at different concentration of the activated carbon used were analysed using Langumuir isotherm model. The work showed that the amounts of Fe2+ ions adsorbed, qe (mg/g) were 1.48, 4.45, 6.67, 8.52 and 6.31 using 0.30g, 0.40g, 0.50g, 0.60g and 0.70g of the activated carbon, respectively; the amount of Fe2+ adsorbed, qp (mg/g) at different pH were 8.58, 8.54, 8.53, 6.92 and 6.19 from aqueous solutions of pH 5.00, 6.00, 7.00, 8.00 and 9.00, respectively and ; the maximum adsorption capacities, qm (g/g) x 10-3 of the activated carbon were 1.60, 4.87, 7.42, 9.65 and 6.70, for 0.30g, 0.40g, 0.50g, 0.60g and 0.70g, respectively. The work also showed that the adsorption isotherm of the process was favourable and monolayer on the surface of the adsorbent (activated carbon).
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