Combined Analytical Py-GC-MS, SEM, FTIR and C-13 NMR for Investigating the Removal of Trace Metals from Aqueous Solutions by Biochar
De Andrade MAM, Monteiro ASC, Gontijo ESJ, De Castro Bueno C, Macedo JCA, Rangel EC, Melo DS, Montero JIZ, Rosa AH (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 31
Pages Range: 1518-1530
Journal Issue: 7
DOI: 10.21577/0103-5053.20200038
Abstract
In this study, the efficiency of biochar (BC) produced from sugarcane bagasse at different pyrolysis temperatures (300, 400, 500 and 600 degrees C) for simultaneous removal of Cd-II, Pb-II, Cu-II, Cr-III, Ni-II and Zn-II ions from aqueous solutions was assessed. All BC were characterized using scanning electron microscopy (SEM), Fourier transform infrared (FTIR). C-13 nuclear magnetic resonance (C-13 NMR) and pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS). The effects of pyrolysis temperature, initial adsorbate concentration and adsorbent dosage on adorption capacity of BC were examined through batch experiments. The BC efficiency was also evaluated after a desorption cycle. The maximal adsorptions (C-II: 51.50%. Crm: 74.35%. Cu-III: 91.18%, Ni-II: 47.05%. Pb-II: 96.17% and Zn-II: 40.50%) were observed for BC produced at 500 degrees C, probably because of its higher porosity and presence of functional groups detected by SEM and FTIR. The maximum adsorption capacity for Cd-II, Cr-III, Cu-II, Ni-II and Zn-II (ions fitted to Langmuir model) were 175, 303, 455. 156 and 128 mu g g(-1). respectively. The predominance of phenolic groups observed in Py-GC-MS data may explain the high percentage of multi-element removal. Experimental data were best fitted to pseudo-second order, Sips and Freundlich models. The BC presented good removal results after a desorption cycle.
Authors with CRIS profile
Involved external institutions
São Paulo State University / Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP)
Brazil (BR)
Federal University of Sergipe / Universidade Federal de Sergipe (UFS)
Brazil (BR)
Brazil (BR)
Federal University of Sergipe / Universidade Federal de Sergipe (UFS)
Brazil (BR)
How to cite
APA:
De Andrade, M.A.M., Monteiro, A.S.C., Gontijo, E.S.J., De Castro Bueno, C., Macedo, J.C.A., Rangel, E.C.,... Rosa, A.H. (2020). Combined Analytical Py-GC-MS, SEM, FTIR and C-13 NMR for Investigating the Removal of Trace Metals from Aqueous Solutions by Biochar. Journal of the Brazilian Chemical Society, 31(7), 1518-1530. https://dx.doi.org/10.21577/0103-5053.20200038
MLA:
De Andrade, Mineia A. M., et al. "Combined Analytical Py-GC-MS, SEM, FTIR and C-13 NMR for Investigating the Removal of Trace Metals from Aqueous Solutions by Biochar." Journal of the Brazilian Chemical Society 31.7 (2020): 1518-1530.
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