Sequential fractionation and characterization of lignin and cellulose fiber from waste rice bran

• Published in: Journal of environmental chemical engineering 2020-10, Vol.8 (5), p.104124, Article 104124
• Main Authors: Arun, Varun, Perumal, Eashwar M., Prakash, Kandheish Arul, Rajesh, Mathur, Tamilarasan, Krishnamurthi
• Format: Article
• Language: English
• Subjects: Biorefineries application; Bleaching treatment; Fractionation; Pre-treatment; Renewable materials
• ISSN: 2213-3437; 2213-3437
• DOI: 10.1016/j.jece.2020.104124

[Display omitted] •Fractionation of lignin from rice bran using acid pre-treatment process.•Extraction of cellulose fibers from rice bran using alkali bleaching process.•Characterization of lignin fraction by UV, FTIR, and MALDI-TOF-MS analysis·•Changes of biomass surface analysis by SEM, XRD, FTIR and XPS. Cellulose and lignin were simultaneously isolated from rice bran is an interesting and alternative renewable materials synthesis for industrial application. In the present research, acid pre-treatment (AT) (85 % organic acid, 80 °C, 120 min) has been proposed for the fractionation of lignin from rice bran (RB). After end of the pre-treatment, residual RB was further submitted to bleaching treatment (BT) (1.7 % sodium chlorite, 60 °C, 120 min) for fractionation of cellulose fibres. The isolated lignin structure was extensively characterized using UV–vis spectroscopy, Fourier-transform infrared spectroscopy (FT-IR) and matrix assisted laser desorption/ionisation-time of flight-mass spectrometry (MALDI-TOF-MS). In addition, surface morphology and surface elemental composition of untreated rice bran (UT-RB), acid treated rice bran (AT-RB) and bleaching treatment rice bran (BT-RB) were performed by X-ray photoelectron spectroscopy (XPS), SEM, XRD and FTIR. Fractionated lignin and cellulose fibres could be used as feedstock in the integrated biorefineries application.