Fabrication of cellulose nanocrystal from Carex meyeriana Kunth and its application in the adsorption of methylene blue

Xue, Yongjie; Liu, Hui; Han, Fuyi; Jiang, Shuai; Liu, Lifang; Xia, Zhigang

doi:10.1016/j.carbpol.2017.08.007

Cited by 53 publications

(19 citation statements)

References 43 publications

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“…The more the carboxyl groups on the nanocrystals, the lower the T 0 and T max . ,, Also, when the reaction time was increased, the carboxylated CNCs possessed a smaller size and a larger specific surface area (SEM image from Figure ), which led to a reduction in the thermal stability . Compared to previous reported T max of CNC samples (cotton linter pulp, kenaf bast fibers, carex meyeriana kunth, viscose fibers, coconut husk fibers, rice husk, and bacterial cellulose), the thermal stability of our carboxylated CNCs was enhanced, as shown in Figure C.…”

Section: Resultsmentioning

confidence: 87%

Facile and Green Synthesis of Carboxylated Cellulose Nanocrystals as Efficient Adsorbents in Wastewater Treatments

Fan

Wang

et al. 2019

ACS Sustainable Chem. Eng.

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A simple and eco-friendly Fe2+/H2O2 oxidation of microcrystalline celluloses (MCCs) to prepare cellulose nanocrystals (CNCs) with high carboxylation content is proposed. The effects of reaction times on the morphology, microstructure, and chemical and thermal properties of isolated carboxylated CNCs were investigated. The oxidative decomposition of Fe2+/H2O2 solution of MCC yielded CNCs with a size of 92–140 nm in length and 19–23 nm in width. The CNCs extracted at 6 h possessed the highest carboxyl content (2.2 mmol/g) with a zeta potential of −41 mV and a thermal decomposition temperature of greater than 325 °C. These CNCs are efficient adsorbents for dyes (methylene blue) and metal ions (copper ion) found in wastewater, with removal rates of up to 95.6 and 82.3%, respectively.

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Section: Resultsmentioning

confidence: 87%

Facile and Green Synthesis of Carboxylated Cellulose Nanocrystals as Efficient Adsorbents in Wastewater Treatments

Fan

Wang

et al. 2019

ACS Sustainable Chem. Eng.

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“…As shown in Figure 6 a, the MB removal efficiency of PUB 1 was increased from 45.12 to 71.16% within 60 h. It could be observed that adsorption was not fully saturated at 60 h. The unsaturated adsorption of PUB 1 was ascribed to the unexposed adsorption sites of hemicellulose and lignin. 51 The MB removal efficiencies of PUα 1 and PUN 1 increased first and then stabilized at 73.94 and 95.52%, respectively, as the contact time reached 60 h. These results indicated that PUN 1 had the maximum adsorption capacity for MB, which was ascribed to the high specific surface area and a large number of exposed hydroxyl groups on the surface of nanocellulose. 52 All of the adsorption efficiencies of biofoam adsorbents were greater than that of PU 0 , which was ascribed to the pure foam mainly acting as a matrix and having poor adsorption capacity.…”

Section: Resultsmentioning

confidence: 78%

“…It suggested that the removal of MB by PUB 1 , PUα 1 , and PUN 1 samples was controlled by chemical adsorption. 51 , 60 , 61 …”

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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“…Carex meyeriana Kunth (CMK), a perennial herb belonging to a genus Cares species in the family Cyperaceae, is widely distributed in China including Heilongjiang, Jilin, Inner Mongolia and Sichuan (Reznicek, 1990) and other countries such as Far East Russia, Mongolia, Korea and Japan (Yang et al, 2017a). The shoe pads, waist supports, mattress and other daily necessities made of CMK as the main material can keep warm and actively absorb moisture and they are hard to self-corrode (Luo and Zhang, 2008).…”

Section: Introductionmentioning

confidence: 99%

Extraction, Partial Identification and Bioactivities of Total Flavonoids from Carex meyeriana Kunth

Wang¹,

Wang²,

Yang³

et al. 2019

American Journal of Biochemistry and Biotechnology

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To date, knowledge associated with extraction, chemical constituents and bioactivities of Total Flavonoids from Carex meyeriana Kunth (TFCMK) that remains unclear. Therefore, this paper was designed to optimize the ethanol reflux extraction method by response surface methodology and determine the chemical constituents by Liquid Phase-Mass Spectrometry (HPLC-MS); additionally, the bioactivities including antioxidant, antibacterial and hemolysis test were also explored. The maximum TFCMK extraction yield of 6.248%±0.016% was obtained under the optimal conditions as follows: Ethanol concentration 50%, ratio of liquidto-solid 31 mL/g, extraction time 91 min and extraction temperature 71°C. Meanwhile, 9 compounds of TFCMK were identified by using LP-MS for the first time. In addition, TFCMK showed higher antioxidant activity compared with vitamin C, as evidenced by the lower EC 50 or IC 50 of TFCMK (reducing power assay: 0.125±0.025 mg/mL, DPPH radicals: 0.28± 0.031, ABTS + radicals:0.012 ± 0.005, hydroxyl radicals: 0.028±0.008 mg/mL; The EC 50 or IC 50 of VC 0.156±0.012, 0.059±0.019, 0.068±0.024 and 0.032±0.007 mg/mL, respectively.). Broth microdilution assays had demonstrated that the minimal inhibitory concentrations (MICs) of TFCMK on Bacillus pumilus, Bacillus subtilis and Escherichia coli were 0.625±0.0032, 1.250±0.0216 and 5.000±0.0205 mg/mL, respectively. Besides, the hemolysis rate (less than 5%) in vitro implied that TFCMK possessed a good blood compatibility. In summary, this paper provides evidences that TFCMK might be applied as an antioxidant and antibacterial agent in the pharmaceutical and chemical industries.

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Fabrication of cellulose nanocrystal from Carex meyeriana Kunth and its application in the adsorption of methylene blue

Cited by 53 publications

References 43 publications

Facile and Green Synthesis of Carboxylated Cellulose Nanocrystals as Efficient Adsorbents in Wastewater Treatments

Facile and Green Synthesis of Carboxylated Cellulose Nanocrystals as Efficient Adsorbents in Wastewater Treatments

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

Extraction, Partial Identification and Bioactivities of Total Flavonoids from Carex meyeriana Kunth

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