Dilute Alkali and Hydrogen Peroxide Treatment of Microwave Liquefied Rape Straw Residue for the Extraction of Cellulose Nanocrystals

Huang, Xingyan; Hoop, Cornelis F. De; Li, Feng; Hse, Chung‐Yun; Qi, Jinqiu; Yong, Jiang; Chen, Yuzhu

doi:10.1155/2017/4049061

Cited by 17 publications

(18 citation statements)

References 38 publications

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“… 5 Furthermore, sulfuric acid hydrolysis used to produce nanocellulose could introduce negatively charged sulfate ester. 55 This could contribute to attracting positive charged cationics. By increasing the pH from 3 to 11, the MB adsorption capacity of PUB 1 increased from 0.48 to 2.34 mg/g with 98.61% MB removal efficiency and that of PUα 1 increased from 0.50 to 2.32 mg/g.…”

Section: Resultsmentioning

confidence: 99%

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Bamboo-Based Biofoam Adsorbents for the Adsorption of Cationic Pollutants in Wastewater: Methylene Blue and Cu(II)

Qiu

Zhang

et al. 2021

ACS Omega

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Human health is being threatened by cationic pollutants in wastewater, for example, methylene blue (MB) and Cu(II). Our research team successfully fabricated biofoam adsorbents from recycled bamboo waste that removed cationic pollutants via introducing bamboo fiber sources, i.e. , bamboo fiber, bamboo α-cellulose fiber, and bamboo nanocellulose fiber, into a polyurethane (PU) foam matrix. The biofoam adsorbent with 1 g of nanocellulose (PUN 1 ) presented high removal efficiencies for MB (95.52%) and Cu(II) (100%) in low cationic pollutant concentration aqueous solutions. The biofoam adsorbent with 1 g of bamboo fiber (PUB 1 ) also displayed excellent removal efficiency for MB (98.61%) at pH 11. Meanwhile, 100% removal of Cu(II) was obtained by PUB 1 at pH 7 (initial content = 15 mg/L). Furthermore, the PUN 1 sample had excellent reusability, evidenced by 61.25% removal of MB after five adsorption–desorption cycles, suggesting that PUN 1 is a promising renewable adsorbent for cationic pollutants. In addition, PUB 1 is a low-cost adsorbent with good adsorption efficiencies for MB in weak alkaline solutions and Cu(II) in neutral aqueous solutions.

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Section: Resultsmentioning

confidence: 99%

“…This phenomenon was partially attributed to the hydrogen bonding formed between MB and PUN 1 that has a large number of −OH groups . Furthermore, sulfuric acid hydrolysis used to produce nanocellulose could introduce negatively charged sulfate ester . This could contribute to attracting positive charged cationics.…”

Section: Resultsmentioning

confidence: 99%

Bamboo-Based Biofoam Adsorbents for the Adsorption of Cationic Pollutants in Wastewater: Methylene Blue and Cu(II)

Qiu

Zhang

et al. 2021

ACS Omega

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“…Further research found that the microwaveliquefied bamboo residues still retained the cell wall structure and tracing cellulose, and pure white cellulose fibers could be extracted from the residues with a mild bleaching process. Further treatment of the cellulose yielded nanofibrillated cellulosic fibers with lengths greater than 550 nm ( Figure 3) [50,89,90].…”

Section: Characterization and Utilization Of Liquefied Residuesmentioning

confidence: 99%

Agricultural and Forest Residues towards Renewable Chemicals and Materials Using Microwave Liquefaction

Shao

Zhao

Xie

et al. 2019

International Journal of Polymer Science

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Microwave-assisted liquefaction is regarded as a promising thermochemical approach to produce renewable and sustainable chemicals and materials from lignocellulosic biomass. Agricultural and forest residues as sources of lignocellulosic biomass have great potential in this regard. With process optimizations, several biomass types have been subjected to liquefaction in different solvents with various catalysts. The products from recent microwave liquefaction with and without further fractionation have been thoroughly analyzed and used for the synthesis of biomaterials. Renewable chemicals, polyurethane foams with partial use of renewable raw materials, and phenolic resins have been the main products from microwave-liquefied products. Further research on microwave liquefaction mechanisms and scalable production should be enhanced to fully evaluate the economic and environmental benefits. This work presents an overview on achievements using liquefaction in combination with microwave energy to convert lignocellulosic biomass into value-added products and chemicals.

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“…The raw material source of CNPs is abundant and can be made from wood, herbaceous plants, tunicates, algae, crab shells, bacteria, etc. [ 6 , 7 , 8 , 9 ]. The preparation methods of CNPs mainly include mechanical diminution (grinder, ultrasonic treatment, high-pressure homogenizer, and microfluidization), chemical diminution (sulfuric acid hydrolysis and hydrochloric acid hydrolysis), bio-enzyme methods, and combinations thereof [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Cellulose Nanoparticles from Foliage by Bio-Enzyme Methods

et al. 2021

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There are vast reserves of foliage in nature, which is an inexhaustible precious resource. In this study, the chemical components of five foliage types (pine needles, black locust tree leaves, bamboo leaves, elm leaves and poplar leaves) were analyzed, including cellulose content, hemicellulose content, and lignin content. The bio-enzymatic method was then used to prepare cellulose nanoparticles (CNPs) from these five kinds of leaves, and the prepared CNPs were analyzed using TEM, FTIR, FESEM, and XRD. The results showed that the content of hemicellulose in bamboo leaves was the highest, and the lignin content in the other four leaves was the highest. The cellulose content in the five kinds of foliage was arranged from large to small as pine needles (20.5%), bamboo leaves (19.5%), black locust leaves (18.0%), elm leaves (17.6%), and poplar leaves (15.5%). TEM images showed that the CNPs prepared by the five kinds of foliage reached the nanometer level in width and the micrometer level in length; therefore, the CNPs prepared in this study belonged to cellulose nanofibers (CNFs). The results of FTIR and XRD showed that CNFs prepared by the enzyme treatment exhibited a typical crystalline structure of cellulose II. The degree of crystallinity (DOC) of CNFs prepared from pine needle, poplar leaves, and bamboo leaves are 78.46%, 77.39%, and 81.51%, respectively. FESEM results showed that the CNFs prepared from pine needles, poplar leaves and bamboo leaves by enzymatic method presents a three-dimensional (3D) network structure, and their widths are 31 nm, 36 nm, and 37 nm, respectively. This study provides a meaningful reference for broadening the use of foliage types and improving their added value.

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Dilute Alkali and Hydrogen Peroxide Treatment of Microwave Liquefied Rape Straw Residue for the Extraction of Cellulose Nanocrystals

Cited by 17 publications

References 38 publications

Bamboo-Based Biofoam Adsorbents for the Adsorption of Cationic Pollutants in Wastewater: Methylene Blue and Cu(II)

Bamboo-Based Biofoam Adsorbents for the Adsorption of Cationic Pollutants in Wastewater: Methylene Blue and Cu(II)

Agricultural and Forest Residues towards Renewable Chemicals and Materials Using Microwave Liquefaction

Preparation of Cellulose Nanoparticles from Foliage by Bio-Enzyme Methods

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