Performance of Pleurotus ostreatus Mushrooms and Spent Substrate for the Biosorption of Cd(II) From Aqueous Solution |
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| Authors: | Andreea Antonia Georgescu Andreea Eliescu Cristina Mihaela Nicolescu Marius Bumbac Nicoleta Cioateră |
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| Institution: | 1. Faculty of Environmental Engineering and Food Science, Valahia University of Targoviste, Targovi?te, Romania;2. Doctoral School of Sciences, University of Craiova, Craiova, Romania;3. Doctoral School of Sciences, University of Craiova, Craiova, Romania;4. Department of Chemistry, Faculty of Sciences, University of Craiova, Craiova, Romania;5. Institute of Multidisciplinary Research for Science and Technology, Valahia University of Targoviste, Targovi?te, Romania;6. Faculty of Science and Arts, Valahia University of Targoviste, Targovi?te, Romania;7. Department of Chemistry, Faculty of Sciences, University of Craiova, Craiova, Romania |
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| Abstract: | The capacities of Pleurotus ostreatus mushroom and spent substrate were evaluated for the biosorption of cadmium (II) from aqueous solution in order to select the most efficient material for bioremediation. The optimum sorption conditions were optimized, including the pH of the aqueous solution, contact time, biomass dosage, initial metal concentration, and temperature. The sorption of cadmium on both biosorbents was also evaluated by several kinetic, equilibrium, and thermodynamic models. The possible heavy metal biosorption mechanisms were evaluated through point of zero charge (pHpzc), Fourier-transform infrared (FTIR) spectroscopy and scanning electron microscopy coupled with energy dispersive X-ray microanalysis (SEM-EDX). Based on the results of column studies, the effectiveness of the P. ostreatus spent substrate was confirmed as a biosorbent for Cd(II) removal from aqueous solutions. |
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| Keywords: | Biosorption biosorption mechanism flame atomic absorption spectrometry (FAAS) Fourier transform infrared (FTIR)–attenuated total reflectance (ATR) spectroscopy mushrooms Pleurotus ostreatus Cd(II) scanning electron microscopy with energy dispersive X-ray microanalysis (SEM-EDX) |
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