Please use this identifier to cite or link to this item: http://hdl.handle.net/10400.9/3048
Title: Membrane separation and characterisation of lignin and its derived products obtained by a mild ethanol organosolv treatment of rice straw
Author: Moniz, Patrícia
Serralheiro, Cláudia
Matos, Cristina T.
Boeriu, Carmen G.
Frissen, Augustinus E.
Duarte, Luís C.
Roseiro, Luísa
Pereira, Helena
Carvalheiro, Florbela
Keywords: Phenolic compounds
Pre-treatment
Agricultural Wastes
Rice Straw
Lignin
Wastes valorisation
Issue Date: 2018
Publisher: Elvesier
Citation: Moniz, Patrícia; Serralheiro, Cláudia; Matos, Cristina T. [et.al.]. - Membrane separation and characterisation of lignin and its derived products obtained by a mild ethanol organosolv treatment of rice straw. In: Process Biochemistry, 2018, Vol. 65, p. 136-145
Abstract: ABSTRACT: An organosolv process using ethanol-water was optimized in order to recover high quality lignin from rice-straw previously pre-treated by autohydrolysis at 210 °C. The results showed a selective and appreciable removal of lignin under very mild conditions and the highest delignification yield occurred at 30 °C. The lignin extracts were characterised using capillary zone electrophoresis (CZE), size exclusion chromatography (SEC), Fourier transform infrared spectroscopy (FT-IR) and 31P-NMR, and two-dimensional heteronuclear single quantum correlation NMR spectroscopy (2D-HSQC NMR), which enabled the identification of low molecular weight lignins with a syringyl/guaiacyl ratio of about 0.74 containing phenolic compounds with potential bioactive properties. In order to separate the target compounds, membrane technology has been used and an enriched extract containing value-added phenolic compounds such as tricin, vanillin, ferulic acid and p-coumaric acid was obtained. High membrane efficiency (around 80%) was obtained for target compounds.
Peer review: yes
URI: http://hdl.handle.net/10400.9/3048
ISSN: 1359-5113
Publisher Version: https://doi.org/10.1016/j.procbio.2017.11.012
Appears in Collections:UB - Artigos em revistas internacionais

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