Effect of sequential acid-alkaline treatment on physical and chemical characteristics of lignin and cellulose from pine (Pinus spp.) residual sawdust
Copyright © 2020 Elsevier Ltd. All rights reserved..
Timber industry generates large amounts of residues such as sawdust. Softwoods have a significant economic value for timber production and the Pinus genus is widely utilized. Thus, the aim of this work was to study the hemicellulose extraction and lignin recovery from pine (Pinus spp.) residual sawdust (PRS) by sequential acid-alkaline treatment, generating a cellulose-rich solid fraction. The hemicellulose removed was 87.11% (wt·wt-1) after dilute acid treatment at 130 °C, 4.5% (wt·wt-1) of H2SO4 for 20 min at 120 rpm. Three temperatures were evaluated for recovering the lignin and the highest yield, 93.97% (wt·wt-1), was achieved at 170 °C, 10% (wt·wt-1) of NaOH for 90 min at 120 rpm. Lignin was characterized by Fourier-transform infrared spectroscopy, nuclear magnetic resonance and thermogravimetry. The resulting cellulose-rich fraction exhibited polymorphic transformation. The results demonstrated that PRS is a promising lignocellulosic residue whose lignin and carbohydrates can be readily obtained.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:316 |
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| Enthalten in: |
Bioresource technology - 316(2020) vom: 01. Nov., Seite 123884 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Cavali, Matheus [VerfasserIn] |
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| Links: |
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| Themen: |
9004-34-6 |
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| Anmerkungen: |
Date Completed 08.09.2020 Date Revised 08.09.2020 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.biortech.2020.123884 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a Copyright © 2020 Elsevier Ltd. All rights reserved. | ||
| 520 | |a Timber industry generates large amounts of residues such as sawdust. Softwoods have a significant economic value for timber production and the Pinus genus is widely utilized. Thus, the aim of this work was to study the hemicellulose extraction and lignin recovery from pine (Pinus spp.) residual sawdust (PRS) by sequential acid-alkaline treatment, generating a cellulose-rich solid fraction. The hemicellulose removed was 87.11% (wt·wt-1) after dilute acid treatment at 130 °C, 4.5% (wt·wt-1) of H2SO4 for 20 min at 120 rpm. Three temperatures were evaluated for recovering the lignin and the highest yield, 93.97% (wt·wt-1), was achieved at 170 °C, 10% (wt·wt-1) of NaOH for 90 min at 120 rpm. Lignin was characterized by Fourier-transform infrared spectroscopy, nuclear magnetic resonance and thermogravimetry. The resulting cellulose-rich fraction exhibited polymorphic transformation. The results demonstrated that PRS is a promising lignocellulosic residue whose lignin and carbohydrates can be readily obtained | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Acid-alkaline treatment | |
| 650 | 4 | |a Cellulose | |
| 650 | 4 | |a Hemicellulose | |
| 650 | 4 | |a Lignin | |
| 650 | 4 | |a Pine residual sawdust | |
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| 700 | 1 | |a Oliveira de Andrade Tanobe, Valcineide |e verfasserin |4 aut | |
| 700 | 1 | |a Zandoná Filho, Arion |e verfasserin |4 aut | |
| 700 | 1 | |a Woiciechowski, Adenise Lorenci |e verfasserin |4 aut | |
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