Response surface modelling of the biosorption of Zn(II) and Pb(II) onto Micropogonias undulatus scales: Box–Behnken experimental approach
| Autor: | Joshua O. Ighalo, O.A.A. Eletta |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TD201-500
Chemistry Biosorption Sorption 02 engineering and technology Croaker 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Box–Behnken design Fish scale lcsh:Water supply for domestic and industrial purposes Adsorption Heavy metals Fish scales Box–Behnken Freundlich equation Response surface methodology Fourier transform infrared spectroscopy 0210 nano-technology 0105 earth and related environmental sciences Water Science and Technology Nuclear chemistry |
| Zdroj: | Applied Water Science, Vol 10, Iss 8, Pp 1-12 (2020) |
| ISSN: | 2190-5495 2190-5487 |
| Popis: | In this study, the scales of Micropogonias undulatus fish were investigated as precursors for the development of low-cost biosorbent for the removal of Pb(II) and Zn(II) from aqueous media. The biosorbent was characterised using Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and X-ray diffractometry (XRD). Adsorption parameters (temperature, biosorbent dosage and contact time) were optimised using response surface methodology Box–Behnken experimental design. The optimal factors for Zn(II) removal by croaker fish scale were 145.5 min, 7.01 g/L biosorbent dosage, 30 °C and pH 5.4. The optimal factors for the removal of Pb(II) were 179.3 min, 6.61 g/L biosorbent dosage, 20 °C and pH 3.4. The numerical optimisation revealed that the optimal removal efficiency for Zn(II) and Pb(II) sorption is 96.45% and 98.76%, respectively. The biosorption of both heavy metals was best fit to Freundlich isotherm and pseudo-second-order kinetic models. Thermodynamics studies revealed that the biosorption process was exothermic and spontaneous. |
| Databáze: | OpenAIRE |
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