Abstract
In this work, three polymeric resins were examined as alternatives for the separation of hemicellulose and lignin. The aim was to remove the lignin from spent-sulfite-liquor (SSL) prior to ultrafiltration, producing a hemicellulose-rich retentate with high purity, and increase the capacity of the membrane filtration. The lignin in the SSL was sulfonated; thus, two of the resins were anion exchangers and 1 was hydrophobic. The data from the equilibrium studies and adsorption kinetics were fitted to established models, and the results were interpreted based on these observations. The strongly basic anion exchanger performed best with regard to lignin removal. The adsorption followed the Sips isotherm, indicating that the process was cooperative with chemisorption as the main reaction between the adsorbate and adsorbent based on the kinetics. Regeneration of the adsorbent was also possible, wherein 100 g/L NaCl was sufficient to recover 98% of the lignin. The lignin removal had a positive effect on the ultrafiltration process, in which the flux increased by 38% and the extent of separation between the hemicellulose and lignin rose from 17% to 59%.
Highlights
There is growing interest in replacing fossil-based carbon sources with renewable bio-based alternatives
38% and the extent of separation between the hemicellulose and lignin rose from 17% to 59%
Because lignin and hemicellulose account for over 50% of the available biomass, greater utilization of this material is important with regard to sustainability [1]
Summary
There is growing interest in replacing fossil-based carbon sources with renewable bio-based alternatives To this end, forest-based lignocellulosic biomass is a promising renewable alternative. Forest-based lignocellulosic biomass is a promising renewable alternative It contains primarily cellulose, hemicellulose, and lignin of which cellulose is the most widely known and utilized component. In the past several decades, lignin has been the focus regarding the development of various extraction methods and applications [2,3]. This strategy has led to the development of products such as adhesives, plasticizers, and biofuels [4,5,6]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
