High value-added lignin extracts from sugarcane by-products

Inês F. Mota; João da Silva Burgal; Filipa Antunes; Manuela E. Pintado; Patrícia S. Costa

doi:10.1016/j.ijbiomac.2023.123144

High value-added lignin extracts from sugarcane by-products

Inês F. Mota^*, João da Silva Burgal, Filipa Antunes, Manuela E. Pintado, Patrícia S. Costa

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

This study evaluates the production of lignin bioactive extracts from sugarcane bagasse (SCB) and straw (SCS) alkaline black liquors using greener precipitating agents (methane sulfonic acid (MSA), formic acid (FA) and lactic acid (LA)) as replacers of sulfuric acid (SA), the most common one used in industry. Results showed that the highest precipitation yield was achieved by LA when applied to SCB (14.5 g extract/100 g SCB). Lignin SCB extracts were similar in composition in terms of total carbohydrates (61–70 %), lignin (22–30 %) and inorganics (1.6–2.6 %). Regarding the SCS extracts, similar yields were obtained among all extracts, however, differences in composition were observed between SA and greener precipitating agents, particularly in terms of sugar content. All extracts exhibited radical scavenging activity; overall the extracts were more effective in the scavenging of ABTS radical. FA was the most promising alternative to SA to recover lignin bioactive extracts. This work suggests organic acids as good candidates for obtaining valuable extracts from alkaline pulping of SCB and SCS instead of the conventional sulfuric acid.

Original language	English
Article number	123144
Journal	International Journal of Biological Macromolecules
Volume	230
DOIs	https://doi.org/10.1016/j.ijbiomac.2023.123144
Publication status	Published - 1 Mar 2023

Keywords

Lignocellulosic biomass
Alkaline extraction
Precipitation
Bioactive extracts
Biorefinery

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10.1016/j.ijbiomac.2023.123144Licence: CC BY-NC-ND

60067601Final published version, 757 KBLicence: CC BY-NC-ND

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Cite this

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title = "High value-added lignin extracts from sugarcane by-products",

abstract = "This study evaluates the production of lignin bioactive extracts from sugarcane bagasse (SCB) and straw (SCS) alkaline black liquors using greener precipitating agents (methane sulfonic acid (MSA), formic acid (FA) and lactic acid (LA)) as replacers of sulfuric acid (SA), the most common one used in industry. Results showed that the highest precipitation yield was achieved by LA when applied to SCB (14.5 g extract/100 g SCB). Lignin SCB extracts were similar in composition in terms of total carbohydrates (61–70 %), lignin (22–30 %) and inorganics (1.6–2.6 %). Regarding the SCS extracts, similar yields were obtained among all extracts, however, differences in composition were observed between SA and greener precipitating agents, particularly in terms of sugar content. All extracts exhibited radical scavenging activity; overall the extracts were more effective in the scavenging of ABTS radical. FA was the most promising alternative to SA to recover lignin bioactive extracts. This work suggests organic acids as good candidates for obtaining valuable extracts from alkaline pulping of SCB and SCS instead of the conventional sulfuric acid.",

keywords = "Lignocellulosic biomass, Alkaline extraction, Precipitation, Bioactive extracts, Biorefinery",

author = "Mota, {In{\^e}s F.} and Burgal, {Jo{\~a}o da Silva} and Filipa Antunes and Pintado, {Manuela E.} and Costa, {Patr{\'i}cia S.}",

note = "Funding Information: Work funded by the European Regional Development Fund (ERDF), through the Operational Program for Competitiveness and Internationalization (COMPETE 2020) and Portugal 2020 to the project Alchemy ( POCI-01-0247-FEDER-027578 ). Publisher Copyright: {\textcopyright} 2023 The Authors",

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doi = "10.1016/j.ijbiomac.2023.123144",

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AU - Mota, Inês F.

AU - Burgal, João da Silva

AU - Antunes, Filipa

AU - Pintado, Manuela E.

AU - Costa, Patrícia S.

N1 - Funding Information: Work funded by the European Regional Development Fund (ERDF), through the Operational Program for Competitiveness and Internationalization (COMPETE 2020) and Portugal 2020 to the project Alchemy ( POCI-01-0247-FEDER-027578 ). Publisher Copyright: © 2023 The Authors

PY - 2023/3/1

Y1 - 2023/3/1

N2 - This study evaluates the production of lignin bioactive extracts from sugarcane bagasse (SCB) and straw (SCS) alkaline black liquors using greener precipitating agents (methane sulfonic acid (MSA), formic acid (FA) and lactic acid (LA)) as replacers of sulfuric acid (SA), the most common one used in industry. Results showed that the highest precipitation yield was achieved by LA when applied to SCB (14.5 g extract/100 g SCB). Lignin SCB extracts were similar in composition in terms of total carbohydrates (61–70 %), lignin (22–30 %) and inorganics (1.6–2.6 %). Regarding the SCS extracts, similar yields were obtained among all extracts, however, differences in composition were observed between SA and greener precipitating agents, particularly in terms of sugar content. All extracts exhibited radical scavenging activity; overall the extracts were more effective in the scavenging of ABTS radical. FA was the most promising alternative to SA to recover lignin bioactive extracts. This work suggests organic acids as good candidates for obtaining valuable extracts from alkaline pulping of SCB and SCS instead of the conventional sulfuric acid.

AB - This study evaluates the production of lignin bioactive extracts from sugarcane bagasse (SCB) and straw (SCS) alkaline black liquors using greener precipitating agents (methane sulfonic acid (MSA), formic acid (FA) and lactic acid (LA)) as replacers of sulfuric acid (SA), the most common one used in industry. Results showed that the highest precipitation yield was achieved by LA when applied to SCB (14.5 g extract/100 g SCB). Lignin SCB extracts were similar in composition in terms of total carbohydrates (61–70 %), lignin (22–30 %) and inorganics (1.6–2.6 %). Regarding the SCS extracts, similar yields were obtained among all extracts, however, differences in composition were observed between SA and greener precipitating agents, particularly in terms of sugar content. All extracts exhibited radical scavenging activity; overall the extracts were more effective in the scavenging of ABTS radical. FA was the most promising alternative to SA to recover lignin bioactive extracts. This work suggests organic acids as good candidates for obtaining valuable extracts from alkaline pulping of SCB and SCS instead of the conventional sulfuric acid.

KW - Lignocellulosic biomass

KW - Alkaline extraction

KW - Precipitation

KW - Bioactive extracts

KW - Biorefinery

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JO - International Journal of Biological Macromolecules

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ER -

High value-added lignin extracts from sugarcane by-products

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ALCHEMY: Capturing High Value from Industrial Fermentation BioProducts

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High value-added lignin extracts from sugarcane by-products

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ALCHEMY: Capturing High Value from Industrial Fermentation BioProducts

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