Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 533686
Title Membrane separation and characterisation of lignin and its derived products obtained by a mild ethanol organosolv treatment of rice straw
Author(s) Moniz, Patrícia; Serralheiro, Cláudia; Matos, Cristina T.; Boeriu, Carmen G.; Frissen, Augustinus E.; Duarte, Luís C.; Roseiro, Luísa B.; Pereira, Helena; Carvalheiro, Florbela
Source Process Biochemistry 65 (2018). - ISSN 1359-5113 - p. 136 - 145.
DOI http://dx.doi.org/10.1016/j.procbio.2017.11.012
Department(s) VLAG
FBR Sustainable Chemistry & Technology
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Added value compounds - Combined pretreatment - Lignin - Phenolic compounds - Purification
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.
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