Structural Changes of Alkali Lignin under Ozone Treatment and Effect of Ozone-Oxidized Alkali Lignin on Cellulose Digestibility
نویسندگان
چکیده
In this study, the structural changes of alkali lignin induced by ozonation were investigated, and effect ozone-treated its mechanism on Avicel enzymatic hydrolysis was examined. The physicochemical properties analyzed FTIR, 1H-13C HSQC NMR, GPC. It revealed that ozone pretreatment increased content carboxyl and/or aldehyde groups negative zeta potential lignin, which enhanced electrostatic repulsion between cellulase; S/G ratio reduced, indicating hydrophobic interaction diminished. Langmuir adsorption isotherm showed cellulase binding strength pretreated (OL-pH3, OL-pH7, OL-pH12 16.67, 13.87, 44.05 mL/g, respectively) significantly lower than (161.29 mL/g). 72 h yields added with OL-pH3, 55.4%, 58.6%, 54.9% respectively, 2.6–6.3% higher AL (52.3%). This research aimed to reduce non-productive investigating caused treatment. For first time, we discovered has a further promotion digestion cellulose, providing green feasible process for lignocellulose aiding in more efficient utilization biomass.
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ژورنال
عنوان ژورنال: Processes
سال: 2022
ISSN: ['2227-9717']
DOI: https://doi.org/10.3390/pr10030559