Indian Journal of Science and Technology

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Bioremediation of Ni(II) and Cd(II) from Aqueous Solution


Affiliations
1 Department of Pure and Industrial Chemistry, Bayero University, P. M. B. 3011, Kano, Nigeria
 

Different kinds of low cost agro based fibres can be used to remove both trace and heavy metals from aqueous solutions. The removal efficiency of maize (Zea mays) cob, sawdust and coal was investigated in this study for the bioremediation of nickel and cadmium. Sorption experiments were carried out using batch process and changes in concentration of the adsorbates were monitored by the use of Shimadzu AA650 double beam atomic absorption/flame spectrophotometer. Effects of varying adsorbent dose, adsorbate loading concentration, pH and adsorbent surface area on the percentage removal of the adsorbates were studied. Results revealed that maize cob have higher affinity for Cd than Ni, while the reverse was the case with sawdust and coal, where Ni was found to have higher percentage removal than Cd. Thermodynamic parameters such as ΔH and ΔS were calculated from Van't Hoff plots which subsequently lead to the computation of ΔG. At 60 mg/L adsorbate concentrations, the adsorption process was found to be endothermic, spontaneous and feasible. The enthalpy, entropy and Gibbs energy changes for the removal of Ni onto maize cob were higher than those of Cd and the opposite scenario was observed for sawdust and coal.

Keywords

Adsorbent, Adsorbate, Percentage Removal, Maize Cob, Sawdust, Coal
User

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  • Bioremediation of Ni(II) and Cd(II) from Aqueous Solution

Abstract Views: 452  |  PDF Views: 128

Authors

Muhammad B. Ibrahim
Department of Pure and Industrial Chemistry, Bayero University, P. M. B. 3011, Kano, Nigeria
Wahab L. O. Jimoh
Department of Pure and Industrial Chemistry, Bayero University, P. M. B. 3011, Kano, Nigeria

Abstract


Different kinds of low cost agro based fibres can be used to remove both trace and heavy metals from aqueous solutions. The removal efficiency of maize (Zea mays) cob, sawdust and coal was investigated in this study for the bioremediation of nickel and cadmium. Sorption experiments were carried out using batch process and changes in concentration of the adsorbates were monitored by the use of Shimadzu AA650 double beam atomic absorption/flame spectrophotometer. Effects of varying adsorbent dose, adsorbate loading concentration, pH and adsorbent surface area on the percentage removal of the adsorbates were studied. Results revealed that maize cob have higher affinity for Cd than Ni, while the reverse was the case with sawdust and coal, where Ni was found to have higher percentage removal than Cd. Thermodynamic parameters such as ΔH and ΔS were calculated from Van't Hoff plots which subsequently lead to the computation of ΔG. At 60 mg/L adsorbate concentrations, the adsorption process was found to be endothermic, spontaneous and feasible. The enthalpy, entropy and Gibbs energy changes for the removal of Ni onto maize cob were higher than those of Cd and the opposite scenario was observed for sawdust and coal.

Keywords


Adsorbent, Adsorbate, Percentage Removal, Maize Cob, Sawdust, Coal

References





DOI: https://doi.org/10.17485/ijst%2F2011%2Fv4i5%2F30047