title: Fractionation and physicochemical characterization of lignin from waste jute bags: Effect of process parameters on yield and thermal degradation.
abstract: In this work lignin was extracted from waste jute bags using soda cooking method and effect of varying alkali concentration and pH on yield, purity, structure and thermal degradation of lignin were studied. The Lignin yield, chemical composition and purity were assessed using TAPPI method and UV-vis spectroscopy. Yield and purity of lignin ranged from 27 to 58% and 50-94%, respectively for all the samples and was maximum for 8% alkali concentration and at pH 2 giving higher thermal stability. Chemical structure, thermal stability and elementary analysis of lignin were studied using FTIR,HNMR, thermo gravimetric analysis (TGA) and Elemental analyzer. FTIR andHNMR results showed that core structure of lignin starts breaking beyond 10% alkali concentration. S/G ratio shows the dominance of Syringyl unit over guaiacyl unit.
authors.affiliation: Dr. S.S. Bhatnagar University Institute of Chemical Engineering, Panjab University, Chandigarh, 160014, India.
authors.forename: Dheeraj
authors.initials: D
authors.lastname: Ahuja
authors.affiliation: Dr. S.S. Bhatnagar University Institute of Chemical Engineering, Panjab University, Chandigarh, 160014, India. Electronic address: anupamachem@gmail.com.
authors.forename: Anupama
authors.initials: A
authors.lastname: Kaushik
authors.affiliation: Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh, 171005, India.
authors.forename: Ghanshyam S
authors.initials: GS
authors.lastname: Chauhan
mesh_terms: D000468:Alkalies / Q000737:chemistry; D005591:Chemical Fractionation / Q000379:methods*; D055598:Chemical Phenomena; D006863:Hydrogen-Ion Concentration; D008031:Lignin / Q000737:chemistry* / Q000302:isolation & purification*; D013696:Temperature; D014866:Waste Products
chemical_list: D000468:Alkalies; D014866:Waste Products; D008031:Lignin
keywords: FTIR; Jute fibers; NMR; Soda lignin; TGA; UV; Yield