Removal of nickel(II) from aqueous solution by Vigna unguiculata (Cowpea) pods biomass
The potential to remove nickel(II) ions from aqueous solution using a biosorbent prepared from Vigna unguiculata pods (VUPs) was investigated in batch experiments. The batch mode experiments were conducted utilising independent variables such as pH (2 to 8), contact time (5 to 120 min), dosage conce...
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| Language: | English |
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IWA Publishing
2016
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| Online Access: | http://iwaponline.com/content/early/2016/02/08/wst.2016.012 http://hdl.handle.net/11408/1577 |
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| author | Guyo, Upenyu Sibanda, Kudakwashe Sebata, Edith Chigondo, Fidelis Moyo, Mambo |
| author_facet | Guyo, Upenyu Sibanda, Kudakwashe Sebata, Edith Chigondo, Fidelis Moyo, Mambo |
| author_sort | Guyo, Upenyu |
| collection | DSpace |
| description | The potential to remove nickel(II) ions from aqueous solution using a biosorbent prepared from Vigna unguiculata pods (VUPs) was investigated in batch experiments. The batch mode experiments were conducted utilising independent variables such as pH (2 to 8), contact time (5 to 120 min), dosage concentration (0.2 to 1.6 g), nickel(II) concentrations (10 to 80 mg L−1) and temperature (20 to 50°C). The biosorption data fitted best to the Freundlich biosorption model with a correlation coefficient (R2) of 0.993 and lowest chi square value of 31.89. The maximum sorption capacity of the VUP for nickel(II) was 27.70 mg g−1. Kinetics studies revealed that the biosorption process followed the pseudo-second order model as it had the lowest sum of square error value (0.808) and correlation coefficient close to unity (R2 = 0.998). The calculated thermodynamic parameters showed that the biosorption process was feasible, spontaneous and endothermic. Consequently, the study demonstrated that VUP biomass could be used as a biosorbent for the removal of nickel(II) from aqueous solution. |
| format | Article |
| id | ir-11408-1577 |
| institution | My University |
| language | English |
| publishDate | 2016 |
| publisher | IWA Publishing |
| record_format | dspace |
| spelling | ir-11408-15772022-06-27T13:49:06Z Removal of nickel(II) from aqueous solution by Vigna unguiculata (Cowpea) pods biomass Guyo, Upenyu Sibanda, Kudakwashe Sebata, Edith Chigondo, Fidelis Moyo, Mambo Aqueous solution, Vigna unguiculata The potential to remove nickel(II) ions from aqueous solution using a biosorbent prepared from Vigna unguiculata pods (VUPs) was investigated in batch experiments. The batch mode experiments were conducted utilising independent variables such as pH (2 to 8), contact time (5 to 120 min), dosage concentration (0.2 to 1.6 g), nickel(II) concentrations (10 to 80 mg L−1) and temperature (20 to 50°C). The biosorption data fitted best to the Freundlich biosorption model with a correlation coefficient (R2) of 0.993 and lowest chi square value of 31.89. The maximum sorption capacity of the VUP for nickel(II) was 27.70 mg g−1. Kinetics studies revealed that the biosorption process followed the pseudo-second order model as it had the lowest sum of square error value (0.808) and correlation coefficient close to unity (R2 = 0.998). The calculated thermodynamic parameters showed that the biosorption process was feasible, spontaneous and endothermic. Consequently, the study demonstrated that VUP biomass could be used as a biosorbent for the removal of nickel(II) from aqueous solution. 2016-06-16T08:43:23Z 2016-06-16T08:43:23Z 2016 Article 0273-1223 http://iwaponline.com/content/early/2016/02/08/wst.2016.012 http://hdl.handle.net/11408/1577 en Water Science and Technology;Vol. 73, No.11 open IWA Publishing |
| spellingShingle | Aqueous solution, Vigna unguiculata Guyo, Upenyu Sibanda, Kudakwashe Sebata, Edith Chigondo, Fidelis Moyo, Mambo Removal of nickel(II) from aqueous solution by Vigna unguiculata (Cowpea) pods biomass |
| title | Removal of nickel(II) from aqueous solution by Vigna unguiculata (Cowpea) pods biomass |
| title_full | Removal of nickel(II) from aqueous solution by Vigna unguiculata (Cowpea) pods biomass |
| title_fullStr | Removal of nickel(II) from aqueous solution by Vigna unguiculata (Cowpea) pods biomass |
| title_full_unstemmed | Removal of nickel(II) from aqueous solution by Vigna unguiculata (Cowpea) pods biomass |
| title_short | Removal of nickel(II) from aqueous solution by Vigna unguiculata (Cowpea) pods biomass |
| title_sort | removal of nickel(ii) from aqueous solution by vigna unguiculata (cowpea) pods biomass |
| topic | Aqueous solution, Vigna unguiculata |
| url | http://iwaponline.com/content/early/2016/02/08/wst.2016.012 http://hdl.handle.net/11408/1577 |
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