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Vol.2 , No. 3, Publication Date: Jul. 5, 2017, Page: 34-42
 and Pb (II) Ions Bioremediation from Aqueous Solution Using Unmodified Bambara Groundnut Husk (<i>Vigna Subterranean</i>)&description=The global need to clean-up heavy metal contaminated environment cannot be over emphasized. In this study, the adsorption potential of Bambara Groundnut Husk (BGH) with respect to Cd(II) and Pb(II) ions, was studied in order to consider its possible application in the treatment of heavy metal contaminated wastewater. Functional group elucidation was done using Fourier Transform Infrared (FTIR) spectrometer. The samples were prepared by diluting the adsorbent to 5% KBr and cast into disks for analysis. Similarly, Scanning Electron Microscopy (SEM) was carried out to examine the morphology of the adsorbent. Characterization of the treated biomass was done before and after adsorption. The results of the FTIR spectra showed that there was participation of carbonyl, carboxylic and hydroxyl groups of BGH as major sites for the binding of Cd(II) and Pb(II) ions during adsorption. SEM analysis also revealed the porosity of the adsorbent. Equilibrium batch experimental parameters significantly (<i>p</i>˃0.05) influence the overall adsorption process. However, the equilibrium isotherm modelingof data obtained was best fitted to the Langmuir model than the other isotherm models base on the R2 values of 0.997 and 0.910 for Cd(II) and Pb(II) ions respectively. The monolayer sorption capacity (qe) of Cd (II) was found to be 6.944 mg/g while that of Pb(II) was 13.51 mg/g. The separation factor (R<sub>L</sub>) was between zero and one (0<R<sub>L</sub><1) indicating a favourable adsorption experiment. The low apparent energy of adsorption (<8 kJ/mol) of the D-R isotherm model and the low Langmuir constant (K<sub>L</sub>) values, suggests that the adsorption process was largely due to physisorption mechanism. Kinetic modeling result followed the pseudo-second order model due to the high linear regression values (R<sup>2</sup>) obtained and the closeness of the calculated sorption capacity(qcal) to the experimental sorption capacity(qex). In conclusion, the study generally show that bambara groundnut husk (BGH) is a potential low cost and efficient adsorbent that could be explore for the bioremediation of heavy metal contaminated industrial wastewater.&picture=http://www.aascit.org/aascit/decorators/img/journal/976.jpg)
| [1] | Tatah Verwiyeh Silas, Department of Biochemistry, Federal University Wukari, Wukari, Nigeria. |
| [2] | Otitoju Olawale, Department of Biochemistry, Federal University Wukari, Wukari, Nigeria. |
| [3] | Onwurah Ikechukwu Noel Emmanuel, Department of Biochemistry, University of Nigeria, Nsukka, Nigeria. |
The global need to clean-up heavy metal contaminated environment cannot be over emphasized. In this study, the adsorption potential of Bambara Groundnut Husk (BGH) with respect to Cd(II) and Pb(II) ions, was studied in order to consider its possible application in the treatment of heavy metal contaminated wastewater. Functional group elucidation was done using Fourier Transform Infrared (FTIR) spectrometer. The samples were prepared by diluting the adsorbent to 5% KBr and cast into disks for analysis. Similarly, Scanning Electron Microscopy (SEM) was carried out to examine the morphology of the adsorbent. Characterization of the treated biomass was done before and after adsorption. The results of the FTIR spectra showed that there was participation of carbonyl, carboxylic and hydroxyl groups of BGH as major sites for the binding of Cd(II) and Pb(II) ions during adsorption. SEM analysis also revealed the porosity of the adsorbent. Equilibrium batch experimental parameters significantly (p˃0.05) influence the overall adsorption process. However, the equilibrium isotherm modelingof data obtained was best fitted to the Langmuir model than the other isotherm models base on the R2 values of 0.997 and 0.910 for Cd(II) and Pb(II) ions respectively. The monolayer sorption capacity (qe) of Cd (II) was found to be 6.944 mg/g while that of Pb(II) was 13.51 mg/g. The separation factor (RL) was between zero and one (0
Keywords
Adsorption, Bambara Groundnut Husk (BGH), Heavy Metals, bioremediation Wastewater, Isotherm, Kinetics
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