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A tunable deep eutectic solvent-based processing for valorization of chestnut wood fiber as a source of ellagic acid and lignin
- Publication Year :
- 2022
-
Abstract
- Three different deep eutectic solvent (DES)-based extraction procedures were rationally designed and optimized for the recovery of antioxidants from chestnut wood fiber (CWF), a clean and largely available solid waste of the tannin industry. First, a mild protocol was developed using a choline chloride (ChCl)/tartaric acid DES at 50 °C, for 90 min. Ellagic acid (EA) was identified as the only low molecular weight phenolic component of the extract. In other experiments, harsher conditions were explored involving treatment of CWF with ChCl-based DESs at 120 °C for 8 h, which afforded a solid sample characterized by high phenolic content (up to 1.0 mg of gallic acid equivalents/mg of sample) and antioxidant properties (EC50
- Subjects :
- abbreviations CCD central composite design
ChCl choline chloride
ChCl:LA2 1:2 mol/mol ChCl/lactic acid
ChCl:LA9 1:9 mol/mol ChCl/lactic acid
ChCl:TA2 2:1 mol/mol ChCl/tartaric acid
CT chestnut tannins
CWF chestnut wood fiber
DES deep eutectic solvent
DPPH 2,2-diphenyl-1-picrylhydrazyl
EA ellagic acid
EPR electron paramagnetic resonance
eqs equivalents
FRAP ferric reducing/antioxidant power
HBA hydrogen bond acceptors
HBD hydrogen bond donors
HTS harsh treatment sample
MTS mild treatment sample
TPC total phenolic content
Process Chemistry and Technology
Chemical Engineering (miscellaneous)
Pollution
Waste Management and Disposal
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....3f197b1219fd2ce94942ac0c734f1679