Potential of Biochar from Wood Gasification to Retain Endocrine Disrupting Chemicals
In this study, a biochar obtained from poplar wood gasification at a temperature of 850 °C was used to adsorb the xenoestrogens 4-tert-octylphenol (OP) and bisphenol A (BPA) and the herbicide metribuzin from water. Scanning electron microscopy (SEM-EDX) and Fourier-transform infrared (FTIR) spectros...
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author | Claudia Carnimeo Nicola Colatorti Valeria D’Orazio Pasquale Trotti Elisabetta Loffredo |
author_facet | Claudia Carnimeo Nicola Colatorti Valeria D’Orazio Pasquale Trotti Elisabetta Loffredo |
author_sort | Claudia Carnimeo |
collection | DOAJ |
description | In this study, a biochar obtained from poplar wood gasification at a temperature of 850 °C was used to adsorb the xenoestrogens 4-tert-octylphenol (OP) and bisphenol A (BPA) and the herbicide metribuzin from water. Scanning electron microscopy (SEM-EDX) and Fourier-transform infrared (FTIR) spectroscopy were employed to investigate the surface micromorphology and functional groups composition of biochar, respectively. The study of sorption kinetics showed that all compounds achieved the steady state in less than 2 h, according to a pseudo-second order model, which denoted the formation of strong bonds (chemisorption) between biochar and the compounds. Adsorption isotherms data were described by the Henry, Freundlich, Langmuir and Temkin equations. At temperatures of 10 and 30 °C, the equilibrium data of the compounds were generally better described by the Freundlich model, although, in some cases, high correlation coefficients (r ≥ 0.98) were obtained for more than one model. Freundlich constants, K<sub>F</sub>, for OP, BPA and metribuzin were, respectively, 218, 138 and 4 L g<sup>−1</sup> at 10 °C and 295, 243 and 225 L g<sup>−1</sup> at 30 °C, indicating a general increase of adsorption at higher temperature. Desorption of all compounds, especially OP and BPA, from biochar was slow and very scarce, denoting an irreversible and hysteretic process. Comparing the results of this study with those reported in the literature, we can conclude that the present biochar has a surprising ability to retain organic compounds almost permanently, thus behaving as an excellent low-cost biosorbent. |
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institution | Directory Open Access Journal |
issn | 1996-1944 |
language | English |
last_indexed | 2024-03-09T11:50:11Z |
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spelling | doaj.art-29e82f20c71948cb85097e89cdf1b7ad2023-11-30T23:15:07ZengMDPI AGMaterials1996-19442023-01-0116256910.3390/ma16020569Potential of Biochar from Wood Gasification to Retain Endocrine Disrupting ChemicalsClaudia Carnimeo0Nicola Colatorti1Valeria D’Orazio2Pasquale Trotti3Elisabetta Loffredo4Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari Aldo Moro, 70126 Bari, ItalyDipartimento di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari Aldo Moro, 70126 Bari, ItalyDipartimento di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari Aldo Moro, 70126 Bari, ItalyDipartimento di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari Aldo Moro, 70126 Bari, ItalyDipartimento di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari Aldo Moro, 70126 Bari, ItalyIn this study, a biochar obtained from poplar wood gasification at a temperature of 850 °C was used to adsorb the xenoestrogens 4-tert-octylphenol (OP) and bisphenol A (BPA) and the herbicide metribuzin from water. Scanning electron microscopy (SEM-EDX) and Fourier-transform infrared (FTIR) spectroscopy were employed to investigate the surface micromorphology and functional groups composition of biochar, respectively. The study of sorption kinetics showed that all compounds achieved the steady state in less than 2 h, according to a pseudo-second order model, which denoted the formation of strong bonds (chemisorption) between biochar and the compounds. Adsorption isotherms data were described by the Henry, Freundlich, Langmuir and Temkin equations. At temperatures of 10 and 30 °C, the equilibrium data of the compounds were generally better described by the Freundlich model, although, in some cases, high correlation coefficients (r ≥ 0.98) were obtained for more than one model. Freundlich constants, K<sub>F</sub>, for OP, BPA and metribuzin were, respectively, 218, 138 and 4 L g<sup>−1</sup> at 10 °C and 295, 243 and 225 L g<sup>−1</sup> at 30 °C, indicating a general increase of adsorption at higher temperature. Desorption of all compounds, especially OP and BPA, from biochar was slow and very scarce, denoting an irreversible and hysteretic process. Comparing the results of this study with those reported in the literature, we can conclude that the present biochar has a surprising ability to retain organic compounds almost permanently, thus behaving as an excellent low-cost biosorbent.https://www.mdpi.com/1996-1944/16/2/569biosorbentsorption kineticssorption isothermxenoestrogenendocrine disrupting chemicalherbicide |
spellingShingle | Claudia Carnimeo Nicola Colatorti Valeria D’Orazio Pasquale Trotti Elisabetta Loffredo Potential of Biochar from Wood Gasification to Retain Endocrine Disrupting Chemicals Materials biosorbent sorption kinetics sorption isotherm xenoestrogen endocrine disrupting chemical herbicide |
title | Potential of Biochar from Wood Gasification to Retain Endocrine Disrupting Chemicals |
title_full | Potential of Biochar from Wood Gasification to Retain Endocrine Disrupting Chemicals |
title_fullStr | Potential of Biochar from Wood Gasification to Retain Endocrine Disrupting Chemicals |
title_full_unstemmed | Potential of Biochar from Wood Gasification to Retain Endocrine Disrupting Chemicals |
title_short | Potential of Biochar from Wood Gasification to Retain Endocrine Disrupting Chemicals |
title_sort | potential of biochar from wood gasification to retain endocrine disrupting chemicals |
topic | biosorbent sorption kinetics sorption isotherm xenoestrogen endocrine disrupting chemical herbicide |
url | https://www.mdpi.com/1996-1944/16/2/569 |
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