Enhanced lignin extraction process from steam exploded corn stalk

Wang, Guanhua; Chen, Hongzhang

doi:10.1016/j.seppur.2015.11.036

Cited by 43 publications

(21 citation statements)

References 30 publications

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“…The main active functional groups of three lignin fractions were identified according to previous literature and depicted in Fig. 7(g), 17,28,33 Among three fractions, the signals from xylan were found only in the HSQC spectrum of F3, which was in accordance with the purity analysis. In the aromatic regions, the signals from the three aromatic rings of lignin could be observed clearly in all the spectra of three fractions.…”

Section: Ftir 2d-hsqc and Phenolic Hydroxyl Contentsupporting

confidence: 69%

“…11 Apart from bacteria, some food-processing fungus (e.g. 16,17 The heterogeneity of lignin evidently results in the inhomogeneous structures and properties of lignin. 13 Additionally, the study from Baurhoo et al demonstrated that purified lignin with low molecular weight monophenolic fragments had preferable antimicrobial properties against pathogenic bacteria and could potentially be considered as a natural feed additive.…”

Section: Introductionmentioning

confidence: 99%

“…14 However, natural and extracted lignins show broad molecular weight distributions and diverse functional group contents due to the free radical polymerization of monomeric units in the biosynthesis process 15 and the depolymerization/repolymerization reactions during the isolation process. 16,17 The heterogeneity of lignin evidently results in the inhomogeneous structures and properties of lignin. Structurally, lignin had greater phenolic hydroxyl group content with the decrease of molecular weight.…”

Section: Introductionmentioning

confidence: 99%

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Successive ethanol–water fractionation of enzymatic hydrolysis lignin to concentrate its antimicrobial activity

Wang

Xia

Liang

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND With the emergence of lignocellulose refining, there is an increasing interest in exploring the valuable applications for lignin due to its abundant and underused features. Originating from the physiological function of lignin in plants, this work attempted to evaluate the antimicrobial potential of enzymatic hydrolysis lignin (EHL) from a bioethanol‐derived biorefinery. RESULTS Successive ethanol–water dissolution was employed to fractionate EHL and the antimicrobial activities of three obtained lignin fractions (F1, F2 and F3) were compared by the agar diffusion method and minimum inhibitory concentration (MIC) assays. Interestingly, the results showed that the antimicrobial activities of EHL were centralized in F1 which exhibited obviously growth inhibitory effects against two Gram‐positive (Staphylococcus aureus and Bacillus subtilis) and two Gram‐negative (Escherichia coli and Salmonella enterica) bacteria with MICs of 1, 2, 2 and 2 mg mL−1, respectively. The further characterization suggested that the better solubility and higher phenolic hydroxyl content of F1 caused by lower molecular weight were possibly responsible for the improvement of antimicrobial performance. CONCLUSIONS Consequently, this work suggested that successive ethanol–water fractionation was an effective way to enhance the antimicrobial activity of EHL. © 2018 Society of Chemical Industry

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Section: Ftir 2d-hsqc and Phenolic Hydroxyl Contentsupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Successive ethanol–water fractionation of enzymatic hydrolysis lignin to concentrate its antimicrobial activity

Wang

Xia

Liang

et al. 2018

J of Chemical Tech & Biotech

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“…During biomass fragmentation by alkali treatment, lignin is degraded into soluble fragments and then separated either with the removal of the reaction solvent or by lignin precipitation [ 228 , 229 ]. However, overly severe extraction conditions may induce substantial changes in the original lignin structure [ 229 , 230 ]. Among such processes, organosolv pretreatment with ethanol or acetic acid has been widely used [ 231 ], and organic acids such as acetic acid and formic acid yield a high-quality product [ 232 ].…”

Section: Extraction Of Starch and Lignocellulosic Components (A Challenge)mentioning

confidence: 99%

Advantages and Disadvantages of Bioplastics Production from Starch and Lignocellulosic Components

et al. 2021

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The accumulation of plastic wastes in different environments has become a topic of major concern over the past decades; therefore, technologies and strategies aimed at mitigating the environmental impacts of petroleum products have gained worldwide relevance. In this scenario, the production of bioplastics mainly from polysaccharides such as starch is a growing strategy and a field of intense research. The use of plasticizers, the preparation of blends, and the reinforcement of bioplastics with lignocellulosic components have shown promising and environmentally safe alternatives for overcoming the limitations of bioplastics, mainly due to the availability, biodegradability, and biocompatibility of such resources. This review addresses the production of bioplastics composed of polysaccharides from plant biomass and its advantages and disadvantages.

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“…It was found that the signal intensities for aryl ester linkage (β-O-4 structure, A) were stronger for S2 and S3 while the C-C bonding (structure B and C) signals were more noticeable in S1. This phenomena could be explained by the fact that it is relatively easier to break the aryl ester linkage during the steam explosion pretreatment [31][32][33] and the extraction process using NaOH aqueous solution [34]. Thus, the degraded lignin with low-molecular-weight lignin (S1) exhibited a lower amount of β-O-4 aryl ester linkage.…”

Section: Lignin Fractionation By Stepwise Dissolutionmentioning

confidence: 99%

Stepwise Ethanol-Water Fractionation of Enzymatic Hydrolysis Lignin to Improve Its Performance as a Cationic Dye Adsorbent

et al. 2020

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In this work, lignin fractionation is proposed as an effective approach to reduce the heterogeneity of lignin and improve the adsorption and recycle performances of lignin as a cationic dye adsorbent. By stepwise dissolution of enzymatic hydrolysis lignin in 95% and 80% ethanol solutions, three lignin subdivisions (95% ethanol-soluble subdivision, 80% ethanol-soluble subdivision, and 80% ethanol-insoluble subdivision) were obtained. The three lignin subdivisions were characterized by gel permeation chromatography (GPC), FTIR, 2D-NMR and scanning electron microscopy (SEM), and their adsorption capacities for methylene blue were compared. The results showed that the 80% ethanol-insoluble subdivision exhibited the highest adsorption capacity and its value (396.85 mg/g) was over 0.4 times higher than that of the unfractionated lignin (281.54 mg/g). The increased adsorption capacity was caused by the enhancement of both specific surface area and negative Zeta potential. The maximum monolayer adsorption capacity of 80% ethanol-insoluble subdivision by adsorption kinetics and isotherm studies was found to be 431.1 mg/g, which was much higher than most of reported lignin-based adsorbents. Moreover, the 80% ethanol-insoluble subdivision had much higher regeneration yield (over 90% after 5 recycles) compared with the other two subdivisions. Consequently, the proposed fractionation method is proved to be a novel and efficient non-chemical modification approach that significantly improves adsorption capacity and recyclability of lignin.

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Enhanced lignin extraction process from steam exploded corn stalk

Cited by 43 publications

References 30 publications

Successive ethanol–water fractionation of enzymatic hydrolysis lignin to concentrate its antimicrobial activity

Successive ethanol–water fractionation of enzymatic hydrolysis lignin to concentrate its antimicrobial activity

Advantages and Disadvantages of Bioplastics Production from Starch and Lignocellulosic Components

Stepwise Ethanol-Water Fractionation of Enzymatic Hydrolysis Lignin to Improve Its Performance as a Cationic Dye Adsorbent

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