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Engineering    2017, Vol. 3 Issue (3) : 409 -415
Research |
Optimization, Kinetics, and Equilibrium Studies on the Removal of Lead(II) from an Aqueous Solution Using Banana Pseudostem as an Adsorbent
Shridhar S. Bagali1(),Bychapur S. Gowrishankar2,Aashis S. Roy3()
1. Department of Chemical Engineering, Siddaganga Institute of Technology, Tumkur, Karnataka 572 103, India
2. Department of Biotechnology, Siddaganga Institute of Technology, Tumkur, Karnataka 572 103, India
3. Department of Industrial Chemistry, Addis Ababa Science and Technology University, Addis Ababa 16417, Ethiopia

Natural adsorbents such as banana pseudostem can play a vital role in the removal of heavy metal elements from wastewater. Major water resources and chemical industries have been encountering difficulties in removing heavy metal elements using available conventional methods. This work demonstrates the potential to treat various effluents utilizing natural materials. A characterization of banana pseudostem powder was performed using environmental scanning electron microscopy (ESEM) and Fourier-transform infrared (FTIR) spectroscopy before and after the adsorption of lead(II). Experiments were carried out using a batch process for the removal of lead(II) from an aqueous solution. The effects of the adsorption kinetics were studied by altering various parameters such as initial pH, adsorbent dosage, initial lead ion concentration, and contact time. The results show that the point of zero charge (PZC) for the banana pseudostem powder was achieved at a pH of 5.5. The experimental data were analyzed using isotherm and kinetic models. The adsorption of lead(II) onto banana pseudostem powder was fitted using the Langmuir adsorption isotherm. The adsorption capacity was found to be 34.21 mg·g−1, and the pseudo second-order kinetic model showed the best fit. The optimum conditions were found using response surface methodology. The maximum removal was found to be 89%.

Keywords Banana pseudostem      Lead      Isotherm      Adsorption      Response surface methodology     
Corresponding Authors: Shridhar S. Bagali,Aashis S. Roy   
Just Accepted Date: 13 June 2017   Issue Date: 30 June 2017
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Shridhar S. Bagali
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Aashis S. Roy
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Shridhar S. Bagali,Bychapur S. Gowrishankar,Aashis S. Roy. Optimization, Kinetics, and Equilibrium Studies on the Removal of Lead(II) from an Aqueous Solution Using Banana Pseudostem as an Adsorbent[J]. Engineering, 2017, 3(3): 409 -415 .
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