Wheat straw lignin extraction with bio-based solvents using enabling technologies |
| |
| Authors: | Emanuela Calcio Gaudino Silvia Tabasso Giorgio Grillo Giancarlo Cravotto Thomas Dreyer Gerhard Schories Sven Altenberg Lilija Jashina Galina Telysheva |
| |
| Affiliation: | 1. Dipartimento di Scienza e Tecnologia Del Farmaco, University of Turin, Via P. Giuria 9, 10235 Turin, Italy;2. Dipartimento di Chimica, University of Turin, Via P. Giuria 7, 10125 Turin, Italy;3. Weber Ultrasonics AG, 76307 Karlsbad, Germany;4. TTZ Bremerhaven Am Lunedeich 12, 27572 Bremerhaven, Germany;5. Environmental Systems, Uhlandstrasse 22, 27576 Bremerhaven, Germany;6. Latvian State Institute of Wood Chemistry, 1006 Riga, Latvia |
| |
| Abstract: | ![]()
Two bio-based solvents, natural deep eutectic solvents (NaDESs) and γ-valerolactone (GVL), have been used under microwave (MW), and ultrasound (US) irradiation to design an efficient and sustainable process for wheat straw delignification and have been compared with the traditional alkali procedure. Best delignification (45%) was achieved with a three-component NaDES (lactic acid/glycerol/choline chloride) under MW irradiation (at 120 °C in 30 min), with solid/liquid ratio of 1:50. A GVL/water mixture (8:2) also gave an efficient delignification (27%) under US irradiation (40 kHz, 200 W) at 50 °C for 60 min. Analytical pyrolysis (Py) coupled with GC/MS/FID, provides valuable information on the extracts’ chemical profile. DPPH and Folin–Ciocalteu tests highlighted the efficiency of MW- and US-assisted extraction as well as the extracts quality. The highest antioxidant activity for the NaDES extracts was obtained under US irradiation. |
| |
| Keywords: | Lignin NaDES GVL Ultrasound Microwaves Antioxidant activity |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
