Delignification kinetics and selectivity in poplar cell wall with acidified sodium chlorite

Jin, Kexia; Liu, Xinge; Jiang, Zehui; Tian, Guohui; Yang, Shumin; Shang, Lili; Ma, Jianfeng

doi:10.1016/j.indcrop.2019.04.067

Cited by 33 publications

(15 citation statements)

References 41 publications

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“…Pretreatment shortens the oxidation time of the APS oxidation method. Pretreatment using sodium chlorite/acetic acid can reduce the fiber impurities and results in a rougher fiber surface [ 26 ]. Increasing the surface roughness of fibers increases their porosity in an aqueous medium [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

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Effect of Oxidation Time on the Properties of Cellulose Nanocrystals Prepared from Balsa and Kapok Fibers Using Ammonium Persulfate

et al. 2021

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This study aimed to evaluate the effect of ammonium persulfate’s (APS) oxidation time on the characteristics of the cellulose nanocrystals (CNCs) of balsa and kapok fibers after delignification pretreatment with sodium chlorite/acetic acid. This two-step method is important for increasing the zeta potential value and achieving higher thermal stability. The fibers were partially delignified using acidified sodium chlorite for four cycles, followed by APS oxidation at 60 °C for 8, 12, and 16 h. The isolated CNCs with a rod-like structure showed an average diameter in the range of 5.5–12.6 nm and an aspect ratio of 14.7–28.2. Increasing the reaction time resulted in a gradual reduction in the CNC dimensions. The higher surface charge of the balsa and kapok CNCs was observed at a longer oxidation time. The CNCs prepared from kapok had the highest colloid stability after oxidation for 16 h (−62.27 mV). The CNCs with higher crystallinity had longer oxidation times. Thermogravimetric analysis revealed that the CNCs with a higher thermal stability had longer oxidation times. All of the parameters were influenced by the oxidation time. This study indicates that APS oxidation for 8–16 h can produce CNCs from delignified balsa and kapok with satisfactory zeta potential values and thermal stabilities.

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Section: Resultsmentioning

confidence: 99%

“…Sodium chlorite/acetic acid delignification can selectively remove lignin. It generates fibers with more roughness and porosity [ 26 ]. It is important to increase the penetration of the APS solution into the fibers.…”

Section: Introductionmentioning

confidence: 99%

Effect of Oxidation Time on the Properties of Cellulose Nanocrystals Prepared from Balsa and Kapok Fibers Using Ammonium Persulfate

et al. 2021

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“…The extraction procedure of cellulose in DA-SCB was as follows [41,42]: (1) with a solid loading of 5% (w/v), followed by 5% acetic acid and then deionized water until the solid became neutral. (5) The solid was the DA cellulose and stored at 4 °C for next analysis.…”

Section: Extraction Of Cellulose In Da-scbmentioning

confidence: 99%

Exploring why sodium lignosulfonate influenced enzymatic hydrolysis efficiency of cellulose from the perspective of substrate–enzyme adsorption

Zheng

Lan

et al. 2020

Biotechnol Biofuels

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Background: Cellulase adsorbed on cellulose is productive and helpful to produce reducing sugars in enzymatic hydrolysis of lignocellulose; however, cellulase adsorbed on lignin is non-productive. Increasing productive adsorption of cellulase on cellulose would be beneficial in improving enzymatic hydrolysis. Adding lignin that was more hydrophilic in hydrolysis system could increase productive adsorption and promote hydrolysis. However, the effect mechanism is still worth exploring further. In this study, lignosulfonate (LS), a type of hydrophilic lignin, was used to study its effect on cellulosic hydrolysis. Results:The effect of LS on the enzymatic hydrolysis of pure cellulose (Avicel) and lignocellulose [dilute acid (DA) treated sugarcane bagasse (SCB)] was investigated by analyzing enzymatic hydrolysis efficiency, productive and nonproductive cellulase adsorptions, zeta potential and particle size distribution of substrates. The result showed that after adding LS, the productive cellulase adsorption on Avicel reduced. Adding LS to Avicel suspension could form the Avicel-LS complexes. The particles were charged more negatively and the average particle size was smaller than Avicel before adding LS. In addition, adding LS to cellulase solution formed the LS-cellulase complexes. For DA-SCB, adding LS decreased the non-productive cellulase adsorption on DA-SCB from 3.92 to 2.99 mg/g lignin and increased the productive adsorption of cellulase on DA-SCB from 2.00 to 3.44 mg/g cellulose. Besides, the addition of LS promoted the formation of LS-lignin complexes and LS-cellulase complexes, and the complexes had more negative charges and smaller average sizes than DA-SCB lignin and cellulase particles before adding LS. Conclusions:In this study, LS inhibited Avicel's hydrolysis, but enhanced DA-SCB's hydrolysis. This stemmed from the fact that LS could bind cellulase and Avicel, and occupied the binding sites of cellulase and Avicel. Thus, a decreased productive adsorption of cellulase on Avicel arose. Regarding DA-SCB, adding LS, which enhanced hydrolysis efficiency of DA-SCB, increased the electrostatic repulsion between DA-SCB lignin and cellulase, and therefore, decreased non-productive adsorption of cellulase on DA-SCB lignin and enhanced productive adsorption of cellulase on DA-SCB cellulose.

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“…With the advent of nanoscience and nanotechnology, a revolutionary concept, the lignocellulosic biomass has been utilized non-conventionally by its miniaturization to nano-scale (Lee et al, 2014;Yu et al, 2021). Before both conventional and non-conventional utilization of lignocellulosic biomass, delignification is the most important step for obtaining lignin-free holocellulose (cellulose and hemicellulose) (Jin et al, 2019). Several methods have been reported in the literature for the delignification of lignocellulosic biomass (Kucharska et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…To speed up the process and enhance lignin removal, microwave-assisted delignification has been used (Kohli et al, 2020;Liu et al, 2017). Microwaves possess innate ability in presence of moisture (dipoles or ions) to open up the structure of the cell walls and make the components available for subsequent reaction (Nour et al,88 Environment Conservation Journal 2021). Rice stands to be the largest produced cereal crop globally, with a production of 782 million tonnes in 2018 and increasing by almost 1.8 % yearly.…”

Section: Introductionmentioning

confidence: 99%

Influence of microwave-assisted chemical treatment on delignification of rice straw biomass

Bhat

Shahi

Lohani

et al. 2021

ECJ

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Lignocellulosic biomass (like rice straw) provides an alternative for depleting non-renewable energy sources through its value-added utilization (like production of biofuels and nanocellulose) owing to its abundance, renewability, polymer presence and environmental friendliness. Prior to its utilization, any lignocellulosic biomass is subjected to a time-consuming delignification process for lignin free biomass recovery. The present study aims to reduce the time of delignification of rice straw along with enhancing the delignification percentage of biomass by use of microwave assisted sodium chlorite method. The experiments were done at two microwave power levels (640, 800 W), three bleaching solution concentrations (0.4, 1.7, 3.0 %) and three microwave treatment times (4, 8, 12 min). The delignification percentage of the rice straw for the whole experimentation varied from 24.7 to 90.12%. The results revealed that the time of delignification was greatly reduced (12 min) with a very high delignification (90.12%) percentage. The morphology of the delignified samples also revealed the deconstruction of the lignin structure. The improved method can thus be applied for the delignification of other biomasses as well for quick and effective delignification

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Delignification kinetics and selectivity in poplar cell wall with acidified sodium chlorite

Cited by 33 publications

References 41 publications

Effect of Oxidation Time on the Properties of Cellulose Nanocrystals Prepared from Balsa and Kapok Fibers Using Ammonium Persulfate

Effect of Oxidation Time on the Properties of Cellulose Nanocrystals Prepared from Balsa and Kapok Fibers Using Ammonium Persulfate

Exploring why sodium lignosulfonate influenced enzymatic hydrolysis efficiency of cellulose from the perspective of substrate–enzyme adsorption

Influence of microwave-assisted chemical treatment on delignification of rice straw biomass

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