1. A tunable deep eutectic solvent-based processing for valorization of chestnut wood fiber as a source of ellagic acid and lignin
- Author
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Federica Moccia, Noemi Gallucci, Samuele Giovando, Antonio Zuorro, Roberto Lavecchia, Gerardino D’Errico, Lucia Panzella, Alessandra Napolitano, Moccia, F., Gallucci, N., Giovando, S., Zuorro, A., Lavecchia, R., D'Errico, G., Panzella, L., and Napolitano, A.
- 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 - 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
- Published
- 2022