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Related Concept Videos

Wood Products01:21

Wood Products

121
Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
121

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Related Experiment Video

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Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues
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High value-added lignin extracts from sugarcane by-products.

Inês F Mota1, João da Silva Burgal1, Filipa Antunes2

  • 1Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal.

International Journal of Biological Macromolecules
|January 7, 2023
PubMed
Summary

This study explored greener organic acids like formic acid (FA) to extract bioactive lignin from sugarcane bagasse (SCB) and straw (SCS). Lactic acid (LA) yielded the most extract, and FA showed promise as a sulfuric acid (SA) alternative.

Keywords:
Alkaline extractionBioactive extractsBiorefineryLignocellulosic biomassPrecipitation

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Area of Science:

  • Biomass Valorization
  • Green Chemistry
  • Biopolymer Extraction

Background:

  • Sugarcane bagasse (SCB) and straw (SCS) are abundant agricultural byproducts.
  • Alkaline pulping generates black liquors containing valuable lignin.
  • Conventional lignin extraction uses sulfuric acid (SA), prompting research into sustainable alternatives.

Purpose of the Study:

  • To evaluate greener organic acids (methane sulfonic acid (MSA), formic acid (FA), lactic acid (LA)) as alternatives to SA for precipitating lignin bioactive extracts.
  • To compare the yield and composition of lignin extracts obtained using different precipitating agents.
  • To assess the radical scavenging activity of the extracted lignin bioactive compounds.

Main Methods:

  • Alkaline black liquors from SCB and SCS were treated with MSA, FA, and LA.
  • Precipitation yields were measured.
  • Lignin extract composition (carbohydrates, lignin, inorganics) was analyzed.
  • Radical scavenging activity (ABTS radical) was evaluated.

Main Results:

  • Lactic acid (LA) achieved the highest precipitation yield from SCB (14.5 g/100 g SCB).
  • SCB extracts showed consistent composition across agents; SCS extracts varied in sugar content.
  • All extracts demonstrated radical scavenging activity, with effectiveness against the ABTS radical.

Conclusions:

  • Organic acids, particularly FA, are promising alternatives to SA for recovering bioactive lignin extracts from SCB and SCS.
  • This approach enhances the valorization of agricultural residues through green chemistry principles.
  • The study highlights the potential for producing valuable bioactive compounds from pulping byproducts.